Specifications

ManualsBrandsBriggs & Stratton ManualsTools610000

TABLE OF CONTENTS

SAFETY, MAINTENANCE AND ADJUSTMENTS Section 1. . . . . . . . . . . . . . . . . .

TROUBLESHOOTING Section 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ENGINE DISASSEMBLY Section 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FUEL SYSTEMS AND CARBURETION Section 4. . . . . . . . . . . . . . . . . . . . . . . . . .

GOVERNOR Section 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CYLINDER HEADS AND VALVES Section 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTERS Section 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LUBRICATION SYSTEMS Section 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CYLINDERS AND CRANKCASE COVERS/SUMPS Section 9. . . . . . . . . . . . . . .

CRANKSHAFTS AND CAMSHAFTS Section 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .

PISTONS, RINGS AND CONNECTING RODS Section 11. . . . . . . . . . . . . . . . . . .

ENGINE ASSEMBLY Section 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ENGINE SPECIFICATIONS Section 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983

www.mymowerparts.com

272144 - Vanguard V-Twin

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Summary of content (191 pages)

PAGE 1
272144 - Vanguard V-Twin For Briggs & Stratton Discount Parts Call 606-678-9623 To go to the beginning of each section, TABLE OF CONTENTS click below. To go back to Table of Contents, click on "Bookmark" to the left or 606-561-4983 SAFETY, MAINTENANCE AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . Section 1 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 2 ENGINE DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 1 Safety, Maintenance and Adjustments Page AIR CLEANER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Round Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Square Air Cleaner . . . . . . . . . . . . . . . .
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 IN THE INTEREST OF SAFETY DANGER FOLLOW INSTRUCTIONS CAREFULLY ! • Before attempting to service this equipment, read and understand this manual and the operating instructions. • Failure to follow instructions could result in DEATH, SERIOUS INJURY (including paralysis) or property damage. * Briggs & Stratton does not necessarily know what equipment this engine will power.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 WARNING Gasoline and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death. WHEN ADDING FUEL • Turn engine OFF and let engine cool at least 2 minutes before removing gas cap. • Fill fuel tank outdoors or in a well-ventilated area. Keep gasoline and its vapors away from sparks, open flames, pilot lights, heat, and other ignition sources.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 WARNING WARNING Engines give off carbon monoxide, an odorless, colorless, poison gas. Breathing carbon monoxide can cause nausea, fainting or death. Rotating parts can contact or entangle hands, feet, hair, clothing, or accessories. Traumatic amputation or severe laceration can result. • Start and run engine outdoors. • DO NOT start or run engine in enclosed area, even if doors or windows are open.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Additional Precautions Before working on the engine, read and understand the applicable sections of this manual. Follow all safety warnings. Death, personal injury and/or property damage may occur unless service instructions are followed carefully.
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For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 BRIGGS & STRATTON NUMERICAL IDENTIFICATION SYSTEM YOUR KEY TO THE WORLD'S FINEST ENGINES This chart explains the unique Briggs & Stratton numerical model designation system. It is possible to determine most of the important mechanical features of the engine by merely knowing the model number. Here is how it works: A. The first one or two digits indicate the approximate CUBIC INCH DISPLACEMENT. B.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 FUEL & OIL RECOMMENDATIONS Gaseous Fuel Engines DANGER Fuel Recommendations AVOID INJURY! Gaseous fuel systems should only be worked on in a very well ventilated area. Gasoline Engines • Use clean, fresh regular unleaded gasoline with a minimum of 85 octane. Fresh fuel prevents gum from forming in the fuel system or on essential carburetor parts.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Oil Recommendations ** Oil has four purposes. It cools, cleans, seals and lubricates. During normal operation, small particles of metal from the cylinder walls, pistons, bearings and combustion deposits contaminate the oil. Dust particles from the air also contaminate the oil, forming an abrasive mixture that can wear internal engine parts if the oil is not changed regularly. Fresh oil assists in cooling.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 AIR CLEANER SERVICE ÌÌ Ì WARNING AVOID FIRES! • Never operate an engine with the air cleaner assembly or air cleaner cartridge removed! A properly serviced air cleaner protects internal engine parts from airborne dirt and dust particles. If air cleaner instructions are not followed, particles that should be collected in the air cleaner will pass into the engine.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 CAUTION: DO NOT use petroleum solvents to clean paper cartridge. DO NOT oil paper cartridge. DO NOT use pressurized air to clean or dry paper cartridge. 6. Reinstall pre-cleaner over cartridge. 7. Install cartridge to air cleaner. 8. Install plate, knob and air cleaner cover. Square Air Cleaner 1. Remove knob(s) (2) and cover assembly (1), Fig. 3.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 CARBURETOR ADJUSTMENTS Models 290000 – 350000 The Vanguard OHV twin cylinder engine carburetor fuel mixture adjustment procedure is unique. Perform adjustments exactly in the sequence shown. NOTE: If engine is equipped with Performance Control electronic governor see separate adjustment procedure. Initial Adjustment Fig. 5 ARMATURE AIR GAP ADJUSTMENT 1.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ÌÌ ÌÌ ÌÌ Fig. 8 Fig. 10 4. Turn idle mixture screw slowly CLOCKWISE (1) until engine speed just starts to slow (LEAN mixture), Fig. 11. Final Adjustment All carburetor adjustments performed with the engine running must be made with the air cleaner installed. • Tools Required, Fig. 9: Tachometer #19200 or #19389 Tang Bender #19352 ÌÌ Ì ÌÌ Ì 1. Start engine.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 12 10. If the carburetor is equipped with an idle mixture limiter cap install it at this time. a. Position limiter cap (7) so that stop(s) on limiter cap are at mid point between stop(s) on carburetor body, Fig. 13. Fig. 14 Performance Control Engines NOTE: All carburetor adjustments with engine running must be made with the air cleaner correctly installed. 1.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Idle speed may vary according to OEM specifications. ÌÌ Ì ÌÌ Ì Fig. 16 8. Deactivate idle-down device, or remove jumper wire. Engine should accelerate smoothly to top governed speed. Re-adjust idle mixture screw 1/8 turn richer if necessary. 9. If the carburetor is equipped with an idle mixture limiter cap, install it at this time. a.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 4. While holding throttle lever, SLOWLY turn idle mixture screw for #1 cylinder CLOCKWISE until engine speed just starts to slow (LEAN mixture). a. 1750 RPM – Governed Idle Spring #805453 (RED). b. 1100 RPM – Governed Idle Spring #805454 (WHITE). NOTE: Parts removed for clarity. Fig. 19 5. Then turn idle mixture screw (3) COUNTERCLOCKWISE 3/8 turn, Fig. 20.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Remove deposits from combustion chamber and around valves using a wire brush or scraper. With piston at Top Dead Center (TDC), remove combustion chamber deposits from top of piston. Use care to prevent combustion chamber deposits from entering push rod or oil return cavity in cylinder. Take care not to damage cylinder, top of piston, cylinder head and cylinder head gasket surfaces. 11 Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 540000, 610000 1. Use a coin or screwdriver to twist the Easy Clean Access panel fasteners (1), Fig. 26 COUNTERCLOCKWISE until a CLICK is heard (approx. 3/4 turn). ÌÌ Ì Ì 2. Remove the panel (2). Ì Ì Ì Fig. 28 Fig. 26 3. Blow compressed air from the PTO side to clean the cooling fins (3), Fig. 27 around each cylinder and to back flush the cooling system.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 The crankcase capacity of Vanguard V-Twin engines is approximately: • All (except Model 540000) – 48 oz. (1.4 liters) with filter • Models 540000, 610000 – 79 oz. (2.3 liters) with filter • Models 540000, 610000 – 71 oz. (2.1 liters) without filter NOTE: When checking oil level, screw the dipstick all the way in for accurate readings. 7. Start engine. Run at IDLE for 30 seconds and stop engine.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fixed Speed Adjustable – Except Generators Governor spring is installed in #1 hole in governor lever (3), Fig. 35. Start and run engine for approximately 5 minutes to allow engine to warm up. 1. Turn fixed speed adjustable control nut counterclockwise until control swivel contacts slow speed stop. 2. Use Tool #19352 (1) to bend governed idle tang (2) to obtain RPM shown: Fig.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 5. Turn fixed speed adjustable control nut (6) clockwise (8) to increase or counter-clockwise (7) to decrease engine speed until desired Top No-Load RPM is obtained, Fig. 37. Adjust Secondary Governor Spring 1. Disengage the adjustable fixed speed control nut (Inset, Fig. 40). 2. Loosen and remove fixed speed adjustable control nut, spring and retainer. 3. Rotate governor control swivel (1) counterclockwise to end of travel, Fig. 39.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Adjust Secondary Governor Spring TABLE NO. 1 Generator Type 3600 RPM 60 Cycle 3000 RPM 50 Cycle Top No-Load RPM Regulated No-Load RPM 4250 RPM 3750 RPM 3600 RPM 3150 RPM 1. Move equipment control to SLOW position. 2. Install Adjustment Gauge #19385 (4), with notch over end of governor lever and flat end of tool against governor control bracket as shown in Fig. 42. 3.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 43 Fig. 45 Oil Cooler 7. With equipment control lever in SLOW position and engine running at governed idle RPM, use Tang Bender #19352 (1), and bend throttle restrictor tang (7) so that tang just contacts governor lever (8), Fig. 44. Some engines are equipped with an oil cooler, Fig. 46. The oil cooler is mounted on the blower housing.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 47 All Except Models 540000, 610000 FAST Resistor spark plugs recommended by Briggs & Stratton: SLOW • B&S #491055 (Champion RC12YC) or Fig. 48 • B&S #496018 (Champion RC14YC) Valve Clearance Adjustment Gap to 0.030” (0.76 mm). 1. Set No. 1 cylinder at 1/4” (6 mm) past TDC, compression stroke.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 TUNE-UP PROCEDURE A “Tune-Up,” see the steps listed below, would normally be performed on relatively new engines brought in for minor difficulties. By performing these steps you will either be sure that the engine is functioning properly or will know what major repairs should be made. The steps are also covered in the Overhaul Procedure and will normally be performed as a part of the complete overhaul. touch flywheel.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 23. Cylinder – check cylinder bores and bearings. Remove oil seal. 24. Disassemble and check connecting rods, pistons, piston pins and rings. 25. Disassemble and inspect oil pump. Inspection and Repairs 7. Electric starter. 8. Flywheel and starter pulley (if equipped). 9. Armatures – adjust air gap. 10. Check spark. 11. Valves, seals, springs and retainers. 1. Clean parts. 12.
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1 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 26 www.mymowerparts.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 2 Troubleshooting Page ELECTRICAL SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Alternators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternator System Diagnosis . . . . . . . . . . . . . . . . . . . .
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Most complaints concerning engine operation can be classified as one or more of the following: 1. Will not start 2. Hard starting 3. Lack of power 4. Runs rough 5. Vibration 6. Overheating 7. High oil consumption NOTE: What appears to be an engine problem may actually be the fault of the powered equipment. If equipment is suspect, see Equipment Affecting Engine Operation. SYSTEMATIC CHECK Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fouled Plug or Dead Cylinder If plugs are dry, look for – To test for a fouled spark plug or a non-functioning cylinder, attach Ignition Tester #19368 (2) between the spark plug lead (1) and each spark plug (4).
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Cylinder Leakdown Test Use a leakdown tester to test the sealing capability of each cylinder. Follow the instructions for the leakdown tester you are using to determine the likely problem area(s). 1. Run engine for 5 minutes allowing engine to reach operating temperature.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Conclusion: Cylinder #1 is weaker cylinder. NOTE: A partially sheared flywheel key will affect ignition timing and engine performance. Problems Affecting One Cylinder NOTE: A two cylinder engine will run on one cylinder as long as the power required for the application does not exceed the power produced by one cylinder. Fig. 6 4.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEMS Alternators Alternator System Diagnosis The following list is provided to help diagnose alternator system problems. COMPLAINT POSSIBLE CAUSES Battery not charging • • • • • • • • • • • • Engine RPM too low. Inline fuse “blown” (if equipped). Defective battery. Loose, pinched, or corroded battery ground leads. Loose, pinched, or corroded battery charge leads.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Charging System Identification Table No. 1 provides a means of identifying the various alternator systems. The alternator systems installed on Briggs & Stratton OHV V-Twin Cylinder Engines can be identified by the color of the stator output wires and the connector.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Flywheel Magnet Identification Equipment Used to Test Alternators NOTE: Does NOT include engines with the PowerLinkt system. Digital Multimeter The V-Twin flywheels have a ring of magnets (1) on the inside of the flywheel, Fig. 7, that provides the magnetic field for the charging systems. The size of the magnet determines the alternator output. The Digital Multimeter #19464, Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Testing Alternator Output When testing alternators, perform the tests in the following sequence. NOTE: Before testing alternator output, use an accurate tachometer to temporarily adjust the engine speed to the RPM specified in the test instructions. 1. Test alternator output. Fig. 10 2. Test diode(s) or regulator-rectifier (if equipped).
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 7. If NO or LOW output is found, test diode. DC Alternator The DC alternator provides DC current for charging a 12 volt battery. The current from the alternator is unregulated and is rated at 3 amps. The output rises from 2 amps @ 2400 RPM, to 3 amps @ 3600 RPM. 1. Stator assembly (1), Fig. 12. 2. One RED lead from stator (2). ÌÌ ÌÌ Ì 3. DIODE encased at connector (3). 4. RED connector output lead (4). Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 A Fig. 15 Fig. 14 DC Output Test NOTE: The battery MUST be in good condition to perform this test. NOTE: Service replacement diode harnesses are available. Use resin core solder when installing new harness. Use shrink tubing or tape all connections. DO NOT USE CRIMP CONNECTORS. 2. Insert BLACK test lead into COM receptacle in meter. Dual Circuit Alternator 3.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Diode Test AC Output Test In the DIODE TEST position, the meter will display the forward voltage drop across the diode(s). If the voltage drop is less than 0.7 volts, the meter will BEEP once and display the voltage drop. A CONTINUOUS TONE indicates CONTINUITY (shorted diode) An INCOMPLETE CIRCUIT (open diode) will be displayed as OL. 1. Insert RED test lead into V receptacle in meter. 2.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 The battery is not used for the lights, so lights are available even if the battery is disconnected or removed. Current for the lights is available when the engine is running. The output varies with engine RPM, so the brightness of the lights changes with engine speed. Stator assembly (1), Fig. 19. ÌÌ BLACK lead from stator (2). Connector (3). Two diodes encased in wiring harness (4).
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 A A Fig. 21 Fig. 22 5 & 9 Amp Regulated Alternator Lighting Circuit Test (WHITE Wire) 1. Insert RED test lead into V receptacle in meter. 2. Insert BLACK test lead into COM receptacle. 3. Rotate selector to +))))) (DIODE TEST) position. 4. Attach RED test lead clip (1) to point A, of the WHITE wire (3) Fig. 22. (It may be necessary to pierce wire with a pin as shown.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Output Test Connect stator wire harness to regulator-rectifier. WHEN CHECKING ALTERNATOR COMPONENTS MAKE TESTS IN THE FOLLOWING SEQUENCE: 1. Insert RED test lead into 10A receptacle in meter. Temporarily disconnect stator wire harness from regulator-rectifier. 2. Insert BLACK test lead into COM receptacle. 1. Insert RED test lead into V receptacle in meter. 4.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 2. Two BLACK leads (2) from stator. • 20 Volts – 10 Amp System 3. YELLOW connector (3) with two pin terminals. • 30 Volts – 16 Amp System 5. Regulator-rectifier (5). 6. If NO or LOW output is found check for bare wires or other defects. If wiring defects are not visible, replace the stator. 6. One RED lead from regulator-rectifier to RED connector output lead (6). Regulator-Rectifier Test 4.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 7. If NO or LOW output is found, be sure that regulator-rectifier is grounded properly and all connections are clean and secure. If there is still NO or LOW output, replace the regulator-rectifier. 20 Amp Regulated Alternator The 20 amp regulated alternator system provides AC current through two output leads to the regulator-rectifier.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 4. Attach RED (2) and BLACK (1) test lead probes to the YELLOW wire (4) AC output terminals (6), of the connector (3), as shown in Fig. 31. (Meter test clip leads may be attached to either AC output terminal.) 5. If NO or LOW output is found check for bare wires or other defects. If shorted leads are not visible, replace the stator. 6. With the engine running at 3600 RPM output should be no less than 26 Volts. 7.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 POWERLINKt SYSTEM Some V-Twin engines are equipped with the PowerLinktSystem, an on-board generator system for riding tractors that provides 120 volt, 60 cycle AC to a GFCI receptacle provided by the OEM. 4. If the power goes OFF the GFCI is working correctly. Press the reset button to restore power. NOTE: Use only components.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 4. Test for continuity between the inverter case and the GFCI ground. There should be CONTINUITY in Step 3 and Step 4. If there is NO CONTINUITY a problem exists in the ground circuit. Fig. 36 Testing PowerLinkt Reset Switch Digital Multimeter #19464 is used for this test. Set the meter to the +))))) (DIODE TEST) position. 1. Remove reset (ON-OFF) switch from equipment. Disconnect from wiring harness. Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 If the previous tests have not revealed a faulty component it is necessary to check the alternator output. If the alternator output is within specification the inverter box is faulty and must be replaced. Required tools to test the PowerLinkt system are: 6. Press button on test box and note AC voltage. Alternator output should be NO LESS THAN 100 Volts.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Testing Battery Test Equipment Digital Multimeter #19464. The following tests will be performed with the meter in the V== (DC volts) position, Fig. 40. Fig. 40 WARNING Batteries contain ACID which is poisonous and causes severe burns. Avoid contact with skin, eyes or clothing. • EXTERNAL CONTACT: Flush with clear water for AT LEAST 20 minutes. Call a Physician IMMEDIATELY. • INTERNAL: Drink large quantities of milk or water.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Installation 1. Before installing battery, connect all equipment to be operated. See typical wiring diagram, Fig. 42. 2. Place battery in holder with a flat base. Tighten hold downs evenly until snug. DO NOT overtighten. 3. Connect POSITIVE terminal to POSITIVE (+) battery post first to prevent sparks due to accidental grounding. Tighten connectors securely. 4.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 A jumper wire is required for this test. Testing Engine Wiring Harness Make sure key switch is OFF before connecting jumper wire. The engine wiring harness consists of a ground wire (1) with a diode (4) for each armature (5) and a separate wire (2) for the carburetor solenoid, Fig. 45. The engine wiring harness is connected to the wiring harness provided by the equipment manufacturer.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Attach BLACK test lead to a good ground, Fig. 47. 4. Turn key switch to ON position. Meter should display battery voltage. If meter does not display battery voltage, replace engine wiring harness. If meter displays battery voltage, test the solenoid. Fig. 46 Engine Wiring 1. With key switch OFF, re-connect equipment wiring harness to engine wiring harness.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ENGINE WIRING HARNESS DIAGRAM GROUND WIRE HARNESS CARBURETOR SOLENOID DIODE DIODE ENGINE HARNESS ENGINE HARNESS CONNECTOR RAISED RIB ON CONNECTOR INDICATES GROUND SIDE EQUIPMENT HARNESS CONNECTOR _ + 2 3 1 5 EQUIPMENT SWITCH 4 6 DIODE FAILURE DIAGNOSIS SWITCH ON SWITCH OFF Shuts Off OK 1 Closed Diode Engine Runs (Both Cylinders) Only One Cylinder Shuts Off 1 Open Diode Won’t Run (No Spark) 2 Closed Diodes Engi
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Oil Pressure Test Switch Use Digital Multimeter #19464. Set meter to test for continuity. Remove pressure switch. Connect one tester lead to the switch terminal and the other lead to the metal body of the switch, Fig. 48. The tester should indicate CONTINUITY when no pressure is applied to the switch. The switch should OPEN (no continuity) when approximately 4.5 PSI (0.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Terminals #1, #3 and #6 are grounded to key switch case when key switch is OFF. Meter must indicate CONTINUITY between these terminals and the key switch case when key switch is OFF. When testing RUN and START terminals, meter should show CONTINUITY between terminals, with key switch in position shown. NOTE: The #2 and #5 terminals should show CONTINUITY in both the RUN and START position. Switch Position 1. OFF 2. RUN 3.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Wiring Diagram For Starter Panel & Key Switch For V-Twin Engines Terminal No.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Starter Motor Starter Motor Spins But Does Not Crank Engine a. Sticking pinion gear due to dirt. Conditions Affecting Starter Motor Performance b. Damaged pinion or ring gear. 1. Bound or seized starter motor bearings. c. 2. A shorted, open or grounded armature. d. Battery faulty or damaged. a. Shorted armature (wire insulation worn and wires touching one another) will be indicated by LOW or NO RPM. b.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 6. Insert BLACK test lead into COM receptacle in meter. 7. Rotate meter selector to +))))) (DIODE TEST) position. 8. Attach one meter test lead to each stud terminal on solenoid (2, 3), Fig. 52. 9. Attach one end of jumper lead to POSITIVE terminal on battery (5). 10. Touch jumper wire to tab terminal (4) on solenoid. a.
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2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 PERFORMANCE CONTROL ELECTRONIC GOVERNOR The Performance Control electronic governor control system consists of an electronic control module, wiring and stop switch harness and a throttle actuator. The control module is equipped with an idle-down circuit for applications requiring that feature. By cutting and removing the yellow or red loop wire, the control module can be converted to 50 cycle – 3000 RPM generator applications.
PAGE 60
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Governor Test Static Check Dynamic Check To determine whether a governor problem is being caused by the actuator or the control module, perform the following static check exactly in order shown. Perform dynamic check exactly in order shown. 1. Start engine and check RPM. Top governed speed should be: A pair of jumper wires and a known good 12 volt battery is required. a.
PAGE 61
2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 2. Remove air cleaner assembly. 3. Disconnect governor link at carburetor. 4. Remove governor control bracket with actuator. 5. Disconnect governor link from actuator and remove throttle return spring. 6. Remove two screws, nuts and actuator from control bracket. a. Torque four 8mm screws to 150 in. lbs. (17 Nm). b. Torque two 6mm screws to 70 in. lbs. (10 Nm). Installation 1.
PAGE 62
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GASEOUS FUELED ENGINES TROUBLESHOOTING GUIDE Symptom Potential Cause Action Plugged vent ports on the regulator. Remove plastic shipping plugs. Less than 11 inches of water pressure at the inlet of the secondary regulator. Adjust the primary regulator output to 11 inches of water pressure.
PAGE 63
2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 TROUBLESHOOTING GUIDE (CONTINUED) Engine will not start. g on the regulator g Frost forming or on th the ffuell li line – li liquid id ((nott vapor) entering the system. Gas will not stop flowing after engine is stopped. Gas leak from fuel line. line Gas leak from regulator. 62 Out of fuel. Refuel the tank. Fuel supply shut off. Open fuel tank. Filter or vacuum lock off is not opening.
PAGE 64
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GASEOUS FUEL CARBURETOR ADJUSTMENT Some Briggs & Stratton V-Twin engines were available factory-built to operate on liquefied petroleum gas (LPG) or natural gas (NG). To maintain the California Air Resource Board (CARB) emissions certification on these engines, the Original Equipment Manufacturer (OEM) must use specific equipment and procedures to complete the installation.
PAGE 65
2 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 EQUIPMENT PROBLEMS AFFECTING ENGINE OPERATION Frequently, what appears to be an engine problem may be the fault of the equipment powered rather than the engine itself. Since many types of equipment are powered by Briggs & Stratton engines, it is impossible to list all the conditions that can exist. Listed below are some common equipment problems, and what to look for as the probable cause. Hard Starting or Will Not Start 2.
PAGE 66
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 3 Engine Disassembly Page AFTER DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 ENGINE DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 67
3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 PARTS IDENTIFICATION 6 7 1 5 3 1 AIR CLEANER BASE 2 ROTATING SCREEN 3 CARBURETOR COVER 4 BLOWER HOUSING 5 INTAKE MANIFOLD AND CARBURETOR 6 CHOKE BRACKET 7 AIR CLEANER SUPPORT 8 EXHAUST MANIFOLD 9 GOVERNOR LEVER 10 GOVERNOR CONTROL BRACKET 11 VALLEY COVER 12 CYLINDER SHIELDS 13 VALVE COVERS 4 2 13 10 11 9 8 12 66 www.mymowerparts.
PAGE 68
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 21 14 18 20 14 #2 CYLINDER HEAD 15 #1 CYLINDER HEAD 16 FLYWHEEL AND FAN 17 ALTERNATOR 18 ARMATURES 19 BACKPLATE 20 STARTER MOTOR 21 BREATHER 15 17 27 24 16 25 19 23 28 22 22 CRANKCASE COVER OR SUMP 23 CAMSHAFT AND GOVERNOR SPOOL 24 #2 PISTON AND CONNECTING ROD ASSEMBLY 25 #1 PISTON AND CONNECTING ROD ASSEMBLY 26 CRANKSHAFT 27 VALVES 28 CYLINDER 26 www.
PAGE 69
3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ENGINE DISASSEMBLY Preparation • Drain oil. Remove and discard oil filter. • Disconnect choke and throttle control cables. • Remove engine from equipment. • Remove spark plugs. • Remove muffler and exhaust manifold. Remove Air Cleaner Assembly Vertical Crankshaft – Models 290700 – 380700 Fig. 2 Current style: (Round cartridge), Fig. 1. Horizontal Crankshaft Models 290400 – 350400 1.
PAGE 70
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 4 Fig. 6 Horizontal Crankshaft – Models 351400 – 380400 1. Remove air cleaner cover, cartridge and precleaner. 2. Remove five screws (1) and carburetor shield (2), Fig. 5. Remove Blower Housing and Fan 1. Remove blower housing (1) and debris screen (2), Fig. 7. 3. Disconnect breather tube at air cleaner base and remove air cleaner base (3). ÎÎ Î Î Fig.
PAGE 71
3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Remove Carburetor and Intake Manifold 2. Disconnect choke link (1) from carburetor. Vertical Crankshaft, All Models 3. Disconnect fuel line at carburetor. 1. Remove air cleaner assembly. 4. Disconnect governor link and spring (4) from retainer (3) and throttle lever (2). 2. Remove two screws (2) and choke control bracket, Fig. 9. 5. Disconnect governor link. 3. Disconnect choke link (1) from carburetor.
PAGE 72
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 13 Fig. 15 Remove Flywheel Flywheel – All Models EXCEPT Engines with PowerLinkt Flywheel Nut – Models 290000, 303000, 540000, 610000 1. Prevent the flywheel from turning with Flywheel Strap Wrench, #19433 (5) around outer rim of flywheel, Fig. 14. NOTE: See the special procedure at the end of this section for flywheel removal on engines with the PowerLinkt system. 2.
PAGE 73
3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Flywheel – Models WITH PowerLinkt CAUTION AVOID HAND AND/OR FINGER INJURY! • The flywheel magnets are VERY POWERFUL and can rapidly draw the flywheel to the engine. Exercise caution and use the proper tools when servicing the flywheel. Fig. 18 Required Tools NOTE: The components of Flywheel Puller #19534, are shown in Fig. 17. This tool is REQUIRED to service the flywheel on engines with the PowerLinkt system. 1. Puller 2.
PAGE 74
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Remove Breather and Starter Motor 1. Remove breather (3), alternator (6), backplate (5) and starter motor (4), Fig. 20. Fig. 22 3. Remove head bolts (5, 6, 7, 8) and cylinder head, Fig. 23. Discard cylinder head gasket. Fig. 20 2. Remove crankcase cover/sump.
PAGE 75
3 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Remove Pistons and Connecting Rods NOTE: Remove any carbon or ridge at the top of cylinder bores to prevent breaking rings when removing piston and connecting rod assemblies. Fig. 24 1. Remove #2 connecting rod cap. 2. Push connecting rod and piston assembly (11) out of #2 cylinder (arrow), Fig. 27. Reassemble cap to rod to prevent interchanging. 3. Repeat for #1 cylinder (10). 11 Fig. 27 Fig.
PAGE 76
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 4 Fuel Systems and Carburetion Page CARBURETION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Carburetor Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Carburetor Removal . . . . . . . . . . . . . . . . . .
PAGE 77
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 FUEL SYSTEMS 7 Quart Fuel Tank Removal 1. Remove air cleaner knob (1) and cover (2), Fig. 1. 2. Remove air cleaner nut (3), top plate (4) and element (5). Fig. 2 8. If necessary remove 4 screws and 2 PTO side fuel tank base supports (7), Fig. 3. NOTE: Do not disturb the governor controls. Fig. 3 9. If necessary remove 4 screws and 2 flywheel side fuel tank base supports (8), Fig. 4. Fig. 1 3.
PAGE 78
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Install the supports over the governor control bracket, one side at a time to avoid disturbing the governor adjustment. Install the screws in the same order as removed. 3. Install the fuel tank base plate. Torque screws to 140 in. lbs. (16 Nm). 9 Quart Fuel Tank Removal 1. Remove air cleaner cover knobs (1) and cover (2), Fig. 7. 4. Install the air cleaner base.
PAGE 79
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 5. Lift the fuel tank. Disconnect the fuel hose from the carburetor fuel inlet (6), Fig. 10. Remove the fuel valve shut-off knob from the shut-off link (7). All Except Models 540000, 610000 The fuel pump is actuated by pulsating crankcase vacuum from the engine. The vacuum pulse fitting (2), Fig. 11 is installed on the No. 1 cylinder valve cover.
PAGE 80
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fuel Filter Fuel Shut-Off Valve Replace the inline fuel filter yearly or every 100 hours, whichever occurs first. Replace the filter if dirt or water are present. See the IPL for correct fuel filter. Engines equipped with an optional fuel tank will also have a fuel shut-off valve, Fig. 15. Inspect valve for ease of operation and leakage.
PAGE 81
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 16 Fig. 18 5. Remove air cleaner elbow support screw (8), Fig. 19. 6. Remove 3 intake elbow screws and carburetor assembly. 7. Remove carburetor spacer (10) and gaskets (9). Models 351400 and 380400 The blower housing must be removed so that antiafterfire solenoid wire can be properly routed during reassembly. 1. Disconnect fuel line at carburetor. 2. Remove anti-afterfire solenoid ground wire (5). 3.
PAGE 82
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: The inspection in Step 2 is performed after the carburetor has been disassembled. 11 12 2. Inspect throttle shaft and choke shaft for wear (2), Fig. 22. 13 14 11 15 Fig. 22 Replace either shaft if worn. Replace the carburetor if the body is worn or if either shaft clearance exceeds 0.010” (0.25 mm) when a new shaft is used. Fig. 20 Carburetor Service Disassemble 1.
PAGE 83
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 8. Remove the idle mixture screw (12). 12 11 Fig. 24 Fig. 27 4. Remove fixed main jet (7) using Screwdriver #19062, Fig. 25. 5. Reach into carburetor throat with flat blade screwdriver and push down on end of emulsion tube (8). 9. The top and bottom edges of the throttle plate are beveled. Mark throttle plate (13) before removing to ensure reinstallation in the original position, Fig. 28. X 13 Fig. 25 Fig.
PAGE 84
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 16 17 15 27 18 Fig. 30 26 Fig. 32 This completes procedure. 13. Remove screw (25) and choke plate (24), Fig. 31. the ÎÎÎÎ ÔÔ ÔÔÔ ÔÔÔÔÔ ÔÔÔÔÔ carburetor disassembly Clean Carburetor 1. Disassemble carburetor. 2. Remove and discard all old gaskets, seals and sealing material.
PAGE 85
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Do not use wire, drills or other mechanical devices to clean out metering holes or passages. 8. Install new throttle shaft welch plug. Use round punch and tap in plug until it is flat. Inspect Carburetor 10. Install new ‘‘E” ring (11), washer (10) and felt seal (9) onto choke shaft, Fig. 35. Inspect all parts for wear, cracks, nicks and burrs. Inspect float for leaks. Replace damaged parts. 9.
PAGE 86
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 21. Position bowl drain as shown. 16 22. Torque screw or solenoid to 45 in. lbs. (5 Nm). 16 24 23 17 25 Fig. 37 26 27 18. Install idle jet (18), plug (19) and gasket (20), Fig. 38. 18 19 Fig.
PAGE 87
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 42 Fig. 44 4. Remove emulsion tube (10), Fig. 45. Replace either shaft if worn. Replace the carburetor if the body is worn or if either shaft clearance exceeds 0.010” (0.25 mm) when a new shaft is used. NOTE: If carburetor is equipped with solenoid, remove solenoid seat (9) first, then remove emulsion tube. Disassemble 1. Remove anti-afterfire solenoid (2) or bowl screw (1), washer and bowl (3), Fig. 43.
PAGE 88
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: The top and bottom edges of the throttle plate are beveled. Mark throttle plate before removing to ensure reinstallation in the original position. Remove Fuel Inlet Body and Seat The fuel inlet body must be removed before the inlet seat can be removed. 1. Use Screw #93029 (1) from Flywheel Puller, #19165. Thread screw into seat body 3 - 4 turns, Fig. 49.
PAGE 89
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Clean Carburetor Install Fuel Inlet Seat and Body 1. Disassemble carburetor. 1. Install new inlet seat (1) with chamfered end down, Fig. 51. 2. Remove and discard all old gaskets, seals and sealing material. CAUTION 2. Press in new body (3) using Knockout Pin #19135 (2). AVOID INJURY! • Wear suitable protection when using cleaners. Follow instructions on container. 3.
PAGE 90
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Use LOCTITE 222 on screw threads. 21 22 13 12 14 23 11 15 13 Fig. 55 16. Install emulsion tube (24), Fig. 56, using Screwdriver #19062. 16 12 17. If carburetor is equipped with anti-afterfire solenoid, install solenoid seat (25). Fig. 53 12. Assemble inlet needle retainer (19) to inlet needle (18). Assemble to float (17), Fig. 54. 13. Install float to carburetor body.
PAGE 91
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Nikki Carburetor Replace either shaft if worn. Models 351700, 351400, 380700, 380400 Replace the carburetor of the body is worn or if either shaft clearance exceeds 0.010” (0.25 mm) when a new shaft is used. Check Throttle, Choke Shaft and Body For Wear NOTE: The measurement in Step 1 is taken with the carburetor off of the intake manifold. 1. Lay carburetor on 1/4” (6.35 mm) raised flat surface (1).
PAGE 92
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fixed Main Jet Sizes Model 351700 Left (#1) cylinder is equipped with #98 main jet. Right (#2) cylinder is equipped with #100 main jet. Model 351400 Left (#1) cylinder is equipped with #94 main jet. Right (#2) cylinder is equipped with #98 main jet. Model 380700 Fig. 62 Left (#1) cylinder is equipped with #118 main jet. Right (#2) cylinder is equipped with #116 main jet. 5.
PAGE 93
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: If idle mixture screws are equipped with adjustment limiter caps, remove the caps (18) BEFORE removing idle mixture screws, inset, Fig. 65. 28 19 20 26 27 Fig. 67 18 Clean Carburetor 1. Disassemble carburetor. 2. Remove and discard all old gaskets, seals and sealing material. Fig. 65 10. Mark throttle plates (24) before removing to ensure reinstallation in the original position, Fig. 66. 11.
PAGE 94
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Inspect Carburetor Inspect all parts for wear, cracks, nicks and burrs. Inspect float for leaks. Replace damaged parts. Assemble Carburetor When assembling carburetor, use new seals and gaskets. 6. Assemble inlet needle (11) to float (10). Install float assembly to carburetor body, Fig. 70. Install float hinge pin (12) from throttle lever (13) side.
PAGE 95
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 17 21 19 18 Fig. 72 Fig. 74 12. Install fixed main jets (20), Fig. 73, plugs and washers. 14. Assemble lower body with main jet plugs (23) facing throttle shaft side (24) of carburetor. Make sure gasket remains in position, Fig. 75. Tighten screws (22) securely. Model 351700 Left (#1) cylinder is equipped with #98 main jet. Right (#2) cylinder is equipped with #100 main jet. 15. Install anti-afterfire solenoid with washer.
PAGE 96
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Remove float and inlet needle. Fig. 76 NOTE: The inspection in Step 2 is performed after the carburetor has been disassembled. 2. Inspect throttle shaft and choke shaft for wear (3), Fig. 77. Replace if worn. Fig. 79 If idle mixture screw is equipped with adjustment limiter cap (9), use a pliers to remove it before removing idle mixture screw (inset), Fig. 80. 4.
PAGE 97
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 8. The top and bottom edges of the throttle plate are beveled. Mark throttle plate (11), Fig. 82 before removal to ensure reinstallation in the original position. ÒÒ ÒÒ 20 9. Remove throttle shaft (13) and spacer (14). 10. Remove throttle shaft seal (12). ÒÒÒÒÒÒÒÒÒ ÒÒÒÒÒÒÒÒÒ ÒÒÒÒÒÒÒÒÒ 11 Fig. 84 12 Clean Carburetor 13 1. Disassemble carburetor. 14 2. Remove and discard all old gaskets, seals and sealing material.
PAGE 98
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Use LOCTITE 222 on screw threads (10). Inspect Carburetor Inspect all parts for wear, cracks, nicks and burrs. Inspect float for leaks. Replace damaged parts. Assemble Carburetor When assembling carburetor, use new seals and gaskets. 1. Install new transitional hole welch plug (1), Fig. 85. 2. Use a round punch (2). Tap in plug until it is flat. 3.
PAGE 99
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Use brass inlet needle for fuel pump carburetors. Use aluminum inlet needle for gravity feed carburetors. 18 as shown in Fig. 92. This allows the weight of the float to close the inlet needle. 3. The float height is the dimension between the top flat area of the float just before the radius (23) and the machined surface of the carburetor (22). a. Float height for fuel pump carburetors (A) is 1/16” (1.
PAGE 100
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Check Throttle, Choke Shaft and Body For Wear 29 NOTE: The measurement in Step 1 is taken with the carburetor off of the intake manifold. 30 1. Lay carburetor on 1/8” (3 mm) raised flat surface (1). Use a feeler gauge (2) to check throttle and choke shaft clearance as shown in Fig. 96. 31 32 Throttle shaft and choke shaft clearance must not exceed 0.010” (0.25 mm). Fig.
PAGE 101
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 If equipped, remove adjustment limiter cap (14) with a pliers (inset) before removing idle mixture screw, Fig. 101. 8. Remove idle mixture screw (16) and spring. 9. Remove fuel bowl drain screw (15) and spring. 14 Fig. 98 3. Remove float (5) and fuel inlet needle (6), Fig. 99. 15 NOTE: Float hinge pin (7) is swaged on one end. Drive hinge pin out from side opposite swage. 16 Fig. 101 10. Mark throttle plate (21), Fig.
PAGE 102
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 26 27 28 25 29 ÒÒ ÒÒ ÒÒ 24 23 25 Fig. 105 Fig. 103 This completes procedure. Remove Fuel Inlet Body and Seat The fuel inlet body must be removed before the inlet seat can be removed. the ÒÒ 1. Disassemble carburetor. 2. Remove and discard all old gaskets, seals and sealing material. CAUTION AVOID INJURY! • Wear suitable protection when using cleaners.
PAGE 103
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Inspect Carburetor 8. Assemble spacer (9) onto choke shaft. Inspect all parts for wear, cracks, nicks and burrs. Inspect float for leaks. Replace damaged parts. 9. Insert spring and check ball (11) in to spring pocket. Compress with a small round punch. Assemble Carburetor 10. Push choke shaft into hole until ball engages groove in choke shaft. When assembling carburetor, use new seals and gaskets. 11.
PAGE 104
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 CAUTION: DO NOT press on float to adjust. 26 25 19 20 27 Fig. 110 28 18. Assemble inlet needle retainer (21) to inlet needle (22). Assemble to float (23), Fig. 111. 19. Install float (23) and needle to upper carburetor body. Insert hinge pin (24). 23 21 Fig. 112 21. Place new gasket (31) on lower carburetor body. Make sure holes in body line up with holes in gasket, Fig. 113. 22.
PAGE 105
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Nikki Carburetor Model 540000 General Information The Vanguardt Model 540000 OHV V-Twin utilizes a fixed jet, two barrel, side draft, flo-jet carburetor. Except for idle speed, the carburetor is non-adjustable. The carburetor incorporates a fuel shut-off (anti-afterfire) solenoid that controls fuel flow to the fuel metering system. The solenoid is controlled by the ignition switch. 104 www.mymowerparts.
PAGE 106
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Remove Carburetor from Manifold Remove carburetor gaskets (2) and spacer (1), Fig. 114. Discard carburetor gaskets. Fig. 116 Replace either shaft if worn. Replace the carburetor if the body is worn or if either shaft clearance exceeds 0.010” (0.25 mm) when a new shaft is used. Fig.
PAGE 107
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 14 15 Fig. 118 Fig. 121 7. Remove cover plate (10). Discard gasket (11), Fig. 119. 11. Mark throttle plates (16), Fig. 122, before removal so they will be re-installed in the original position. Sides of throttle plate are beveled. 17 11 16 Fig. 122 Fig. 119 12. Remove screws, throttle plates and throttle shaft with seal. Discard seal (17). 8. Remove screws and choke plate (12), Fig. 120. 9. Remove choke shaft.
PAGE 108
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Parts containing rubber, such as seals, O-rings, inlet needles, seats or pump diaphragms should not be placed in commercial carburetor cleaner. Do not leave non-metallic parts (plastic, nylon, Minlon, etc.), in commercial carburetor cleaner more than 15 minutes. CAUTION AVOID EYE INJURY! Fig. 123 2. Install cover plate (3) with new gasket, Fig. 124.
PAGE 109
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 11 Fig. 126 Fig. 128 8. Assemble bowl gasket (9) to body. 9. Install main jet, according to engine model. 6. Install emulsion tube body (8) with new gasket (19), Fig. 127. Tighten screw securely. 10. Install the float bowl assembly to the carburetor body. 11. Assemble fuel solenoid (13) to float bowl (12), Fig. 129. Use a 13 mm thin profile wrench to tighten the solenoid.
PAGE 110
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Aisan Carburetor Model 610000 General Information The Vanguardt Model 610000 OHV V-Twin utilizes a fixed jet, two barrel, side draft, flo-jet carburetor. The carburetor incorporates a fuel shut-off (anti-afterfire) solenoid that controls fuel flow to the fuel metering system. The solenoid is controlled by the ignition switch. www.mymowerparts.
PAGE 111
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Disassemble Carburetor 1. Remove four screws (1) and float bowl (2), Fig. 130. Discard gasket. 2. Use 13 mm thin profile wrench to remove fuel solenoid (3) from float bowl. Discard gasket. 11 12 13 14 18 17 16 15 Fig. 132 Fig. 130 3. Remove main jets (4) from float bowl, Fig. 131. This completes procedure. the carburetor disassembly Clean Carburetor 1. Disassemble carburetor. 2.
PAGE 112
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Use LOCTITER 222 on screw threads. CAUTION AVOID EYE INJURY! • Wear eye protection when using compressed air. 4. Assemble inlet needle to float. Install float, Fig. 133. 5. Assemble bowl gasket to groove in body. NOTE: The tab on the float bowl gasket (1) goes in the slot in the float bowl carburetor body (2). 4.
PAGE 113
4 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 112 www.mymowerparts.
PAGE 114
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 5 Governor Page GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 GOVERNOR CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 GOVERNORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 115
5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GENERAL INFORMATION NOTE: See Section 2 for Performance Controlt electronic governor service information. Vanguard OHV V-Twin engines may be equipped for remote control, manual friction, or fixed speed adjustable governor controls.
PAGE 116
LOCKED FOR PRINTING – SELECT SECT. NEEDED > 5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Loosen governor lever nut (3). 4. Remove governor lever (2) from shaft. Fig. 7 Remove Governor Shaft 1. Remove cotter pin (3) and collar (2). Discard cotter pin, Fig. 8. Fig. 5 5. Remove rust, nicks or burrs from crankshaft. 2. Slide governor shaft (1) out of bushings (5). 6. Remove oil fill tube and dipstick assembly. 3. Remove and discard seal (4). 7.
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5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ÔÔÔ ÖÖ ÔÔ Ö ÔÔÔ ÖÖ ÔÔ Ö ÖÖ ÔÔ ÖÖ Fig. 9 Fig. 11 2. Insert proper seal protector through oil seal. Install Governor Shaft 1. Assemble lower bushing to governor shaft with thrust flange (4) down, Fig. 10. 2. Slide shaft up through lower bearing and upper bushing. 3. Install crankcase cover or sump with new gasket. Torque screws in sequence shown to 150 in. lbs. (17 Nm), Fig. 12. 4.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 2. If necessary, remove the governor gear (1) from the crankcase cover with two screwdrivers (3). Remove the washer from under the governor gear. Fig. 13 9. Perform governor adjustments, see Troubleshooting, Section 2. WARNING Fig. 15 Inspect Governor Gear Static adjustment of the governor must be completed BEFORE starting or running engine! 1.
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5 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Replace the oil seal (6, under the washer). Replace worn or damaged components. NOTE: Inspect the crank and the crank bushings. If the bushings are damaged or worn replace the cylinder block. Install Governor Crank Fig. 17 2. If necessary remove the crank from the cylinder block. Mark the governor lever and the governor crank to aid in reassembly. Remove the governor lever from the crank (3).
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 6 Cylinder Heads and Valves Page CYLINDER HEAD SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Remove Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 PARTS IDENTIFICATION Compression testing information and procedure is described in Section 2 – TROUBLESHOOTING. Fig. 1 shows the components of a typical V-Twin OHV Cylinder Head. each valve. The redesigned cylinder head, gasket and rocker arm assembly will not interchange with previous cylinder heads. The new cylinder head may be used on earlier V-Twins, but only as a complete assembly. Refer to date code when ordering parts.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 5. Remove intake and exhaust valves. Fig. 5 3. Remove head bolts (5, 6, 7, 8) and cylinder head, Fig. 6. Discard cylinder head gasket. NOTE: Engines manufactured before 940501xx were equipped with sealing washers under cylinder head bolts (5) and (6). Repeat for other cylinder head. Fig. 7 6. Remove and discard valve stem seals, Fig. 8. Fig.
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6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 • CAUTION: Do not resurface cylinder head mounting surfaces. 2. Check valve guide bushings for wear using Plug Gauge (2) #19382, Fig. 10. Replace valve guide if gauge enters guide 1/4” (6 mm) or more. 3. Use Reamer Pilot Guide #19345 (5) and Finish Reamer #19444 (6) to ream new valve guide, Fig. 13. a. Use Stanisol or kerosene to lubricate reamer. b. Ream through entire guide. c.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 1. Measure valve stem diameter approximately 1-1/2” (38 mm) from end of valve, Fig. 15. Replace valve if stem diameter is less than 0.233” (5.92 mm). NOTE: Lightly coat valve stems with Valve Guide Lubricant #93963 before installing valves. Be sure valve guide lubricant is not on valve face, seat or end of valve stem. 3. Install springs and valve spring retainers over valve stems. 1.
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6 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Install Cylinder Heads Early Style 1. Install cylinder head with NEW gasket, Fig. 20. NOTE: Rocker shaft support (3) holes are offset. Install with holes facing ends of rocker shaft, Fig. 22. 1. Lubricate rocker arms (4) and shaft (2) with clean engine oil. 2. Assemble rocker arms, shaft, supports and studs (1) and install on cylinder head, Fig. 22. Torque studs to 140 in. lbs. (16 Nm). Fig.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 7 Starters Page GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 REWIND STARTER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 REWIND STARTER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GENERAL INFORMATION The starter motor uses a gear engagement method, similar to an automotive starter. When the starter motor is activated, the pinion gear engages a ring gear attached to the engine flywheel and cranks the engine. Three starter motors are used on Vanguard V-Twin engines, Figs. 1-3. Nylon Pinion The starter motor shown in Fig.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 C-Ring Style Disassemble CAUTION PREVENT EYE INJURY! • Wear eye protection when removing C-ring. 1. Place the counterbored side of C-ring Remover #19436 (2) over retainer. Align drive pins (1) with open end of C-ring, Fig. 7. NOTE: If retainer (3) has a notch (4) as shown, DO NOT align drive pins with notch. If necessary, rotate notch away from open end of C-ring. Fig. 8 4. Place C-ring (8) over chamfered end of shaft.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Assemble 1. Assemble clutch drive (5) to starter shaft. Rotate clutch until it drops into place, Fig. 11. 2. Install pinion gear (4) with beveled side of teeth UP. 3. Install washer (3) and retainer (1). 4. Install NEW roll pin (2). 3. Assemble lower spring retainer with OPEN END UP. 4. Install spring. 5. Install upper spring retainer with OPEN END UP. 6. Compress spring. Install NEW retaining ring to shaft. 7.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 11 4. Remove end cap and brush retainer with brushes. Replace end cap if bushing is worn or damaged. 12 13 Fig. 15 14 Inspect Armature Commutator Fig. 13 The armature commutator shown in Fig. 16 (A) can be cleaned with fine sandpaper. DO NOT use emery cloth. The commutator can be machined a diameter of NO LESS THAN 1.230” (31.24 mm). 1. Remove pinion gear assembly. 2.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 B A Fig. 17 Fig. 20 Assemble End Cap Replace Brushes Three different brush end caps are used. Refer to Fig. 18 for radial flat coil spring end caps. NOTE: When all parts have been inspected, lightly lubricate bearings in both end caps with #20 oil. Radial Flat Coil Brush Spring 1. Assemble armature to brush end cap before installing brushes. 2. Install brush in holder. 3.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Brush retainers can be made from Part #26634 control wire or similar material. The retainer is U shaped, with two legs 1/2” (13 mm) high (2), 3/4” (19 mm) long (3), Fig. 22, inset. 1. Install brush spring and brush into holder. 2. Compress brush and spring. Install retainer. 3. Repeat for remaining brushes. Fig. 24 2. Compress brushes and springs. Assemble brush retainer to end cap, Fig. 25. Fig. 22 Fig.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 1. Push down on armature and brush end cap. STARTER MOTOR SERVICE 2. Slide starter housing (1) over armature (2), aligning notch with insulated terminal. Models 540000, 610000 NOTE: Use care to prevent damage to magnets in starter housing. 1. Remove nut and field coil wire from stud terminal. Remove Starter Solenoid 2. Remove solenoid mounting nuts and solenoid 3. Lift solenoid to disengage drive lever from plunger, Fig. 29.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Pinion Gear Pinion gear replacement requires complete starter motor disassembly. A thorough inspection of all components should be performed at that time. 5. Remove armature and pinion gear with drive lever from drive end cap, Fig. 33. Disassemble Starter For ease of disassembly and assembly, clamp drive end housing in a vise as shown, Fig. 32. NOTE: Do not damage drive housing or mounting surface. 1. Remove solenoid. 2.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Clean and inspect helix. If helix is damaged, replace starter. Inspect bearing journals on armature shaft for wear or damage. If bearing journals are worn or damaged, replace starter. NOTE: Bearings in drive and brush end cap are not replaceable. Inspect Armature Commutator The armature commutator may be cleaned with fine sandpaper (#300 – 500 grit). DO NOT use emery cloth.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 40 Assemble Pinion Gear 1. Lubricate helix with a light coat of grease. Assemble pinion gear and clutch. 2. Assemble new retainer to shaft. 3. Install new C-ring. 4. Pry up on retainer until C-ring snaps into groove in retainer, Fig. 39. 5. Assemble spacer to armature shaft, Fig. 41. NOTE: Lip (1) on spacer must face bearing in drive end cap. Fig. 42 2.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 8. Install end cap, Fig. 47. Torque thru bolts to 70 in. lbs. (8 Nm). Fig. 44 4. Insert brushes into brush holder, Fig. 45. 5. Compress springs with needle nose pliers and insert spring behind brushes. Fig. 47 9. Install solenoid, see “Starter Solenoid.” RING GEAR SERVICE NOTE: Ring gear is not replaceable on models 540000, 610000. 1. Mark center of rivets holding the ring gear (1) to flywheel (4), Fig.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 REWIND STARTER IDENTIFICATION Two rewind starters are used on V-Twin engines. The rewind starter components (including the starter and cup) are NOT INTERCHANGEABLE between starters. Figure 49 shows how to identify the rewind starters. Current Style Early Style Fig. 49 1. Rewind Starter. 2. Air Inlet Slots – larger on current starters. 3. Retainer – nylon on current starters, metal on early starters. 4.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Replace Rope 4. Rotate pulley CLOCKWISE just until rope hole in pulley (2) is in line with starter housing eyelet (1). Remove Rope 1. Pull rope out partially. Tie a temporary knot (4), Fig. 51. 5. Hold pulley in this position. 2. Remove insert (1) from rope handle (2). Pull knot out of rope insert. 3. Untie knot. Remove insert and handle from rope. 4. Pull rope (3) out as far as it will go. 5.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 5. Carefully lift out pulley with spring, Fig. 57. ÓÓÓ ÓÓÓ ÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓ ÓÓ ÓÓÓÓ ÓÓÓ ÓÓ ÓÓÓÓ ÓÓÓ ÓÓ Fig. 55 Replace Pulley and Spring Current Style Fig. 57 CAUTION PREVENT EYE INJURY! Inspect Starter Housing and Pulley Inspect pulley for wear, cracks, rough edges or burrs in pulley groove (2) and wear on center hole (1), Fig. 58. Replace pulley if damaged or worn.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Assemble Pulley To Housing 2. Install retainer making sure that slots (4) in retainer (6) engage tabs (7) on pulley, Fig. 63. 1. Lay starter housing on work bench. 2. Assemble starter pulley (1) and spring assembly to center pivot post (2) in housing, Fig. 60. 3. Hold retainer down, compressing dog springs and install retainer screw (5). Torque screw to 70 in. lbs. (8 Nm). 4. Install rope. Fig. 60 3.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Inspect Spring, Starter Housing and Pulley Inspect pulley for cracks, rough edges (1) or burrs in pulley groove, wear on spring cup lugs (2), and wear on center hole (3), Fig. 67. Replace pulley if damaged or worn. Ó Fig. 64 3. Lift out dogs (6) and dog springs (7). 4. Rotate pulley (8) until it disengages spring. 5. Carefully lift out pulley, Fig. 65.
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7 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 2. Note location of spring tab (5) and location of spring anchor (4) on center post of starter housing. 3. Lower starter housing onto pulley and spring assembly, Fig. 70. ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓ Fig. 72 2. Place large washer (7), brake spring (6) and retainer (5) on pulley, Fig. 73. 3. Place small washer (4) on shoulder screw (3). Install screw and washer in center pivot post. 4. Position tabs of retainer inside dogs.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 8 Lubrication Systems Page CRANKCASE BREATHER IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 CRANKCASE BREATHER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Models 290000, 300000, 350000, 3510000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GENERAL INFORMATION Crankcase Breather Identification Briggs & Stratton Vanguardt OHV V-Twins use a full pressure lubrication system with an oil filter. The gear driven oil pump (1) draws oil from a screened oil pickup (2) in the sump and pumps the oil through the oil filter (3). The lubrication systems shown are: Vanguardt engines utilize a breather valve to control and maintain a vacuum in the crankcase.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 CRANKCASE BREATHER SERVICE Models 290000 – 351000 Remove the air cleaner assembly. Remove breather assembly (1). Discard gasket (2), Fig. 5. Fig. 7 ÓÓ Ó ÓÓ Ó Install Reed Valve Breather 1. Place breather (2) on gasket (3), Fig. 8. 2. Assemble large O-ring (1) onto mounting screw. 3. Install screw. Torque to 30 in. lbs. (3 Nm). Fig.
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8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Model 380000 Remove two screws. Separate breather assembly from valve cover, Fig. 10. Fig. 12 Fig. 10 Install Breather 1. Assemble reed valve and reed stop to breather body, Fig. 13. Tighten screws securely. Checking Breather 1. Remove two screws, reed stop and reed valve. 2. Place reed valve on flat surface. 3. Check reed valve for distortion with feeler gauge, Fig. 11. NOTE: Holes in reed and reed stop are offset.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 540000, 610000 Oil Pump 1. Remove two screws (6) and breather cover (5), Fig. 15. Inspect 2. Lift off the outer baffle (4). 3. Remove the reed valve assembly (3) and O-ring. 4. Remove the inner baffle (2) from the valve cover (1). Inspect pump drive gear (2) for worn or chipped teeth.
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8 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 540000, 610000 For proper sealing on these models, the oil fill cap (5) has an O-ring, the dipstick has a grommet (6), Fig. 18. NOTE: The oil dipstick tube (7) is not removeable/ serviceable on these models. If damaged replace the crankcase cover. Fig. 18 148 www.mymowerparts.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 9 Cylinders and Crankcase Covers/Sumps Page CYLINDERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Inspect and Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Resizing Cylinder . . . . . . . . . . . . .
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9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 CYLINDERS Inspect and Measure 1. Check cylinder for cracks, stripped threads or broken fins. Check cylinder bores for damage or scoring. 2. Check cylinder head mounting surface for distortion with a straight edge, Fig. 1. Replace the cylinder if the mounting surfaces are distorted more than 0.004” (0.1 mm). Fig. 2 Resizing Cylinder Verify the available piston oversize(s) for the engine being worked on.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 NOTE: Recondition the cylinder bores to restore the crosshatch finish whenever new piston rings are installed to a cylinder that is within specification. Be careful not to hone the cylinder oversize or it will be necessary to resize the cylinder. Lubricate hone as recommended by hone manufacturer. The recommended drill speed is 300 – 700 RPM and 40 - 60 strokes per minute.
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9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ENGINE BEARINGS Mag Bearing – After 970430xx Check 1. Check magneto bearing for damage. Check for wear at several locations using plug gauge #19219 (1) or appropriate measuring tools, Fig. 5. If plug gauge is not available see reject dimension in Section 13. 2. Replace bearing if damaged or worn. Fig. 7 4. Stake bearing in top notch (2) with 1/8” round pin punch to prevent bearing from turning, Fig. 8. Fig. 5 Remove 1.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Insert Bushing Driver #19349 into bearing from oil seal side. Place a reference mark on driver to indicate proper depth of bushing when installing new bearing, as shown, Fig. 6. Remove The magneto bearing has a roll pin installed in the oil gallery to prevent the bearing from turning. 1. Drive roll pin (2) into oil gallery using a 3/16” punch (1), Fig. 10. Fig. 12 2.
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9 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 The following tools are recommended to replace the ball bearing, Fig. 15. (1) Washer #224061 3. Insert screw (2) and washer (1) through pilot (3) and thread into support (5). Tighten screw until bearing is seated. 4. Use Cylinder Support #19227 and press oil seal until flush with crankcase cover. (2) Puller Screw #19318 (3) Pilot #19396 (4) Driver #19401 (5) Support #19440 Fig.
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10 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 10 Crankshafts and Camshafts Page INSPECT CAMSHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 INSPECT CRANKSHAFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 INSPECT FLYWHEEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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10 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 INSPECT CRANKSHAFT Inspect crankshaft threads (1) and keyways (2, 8), Fig. 1. Replace crankshaft if threads or keyways are damaged or worn. Check magneto (3) and PTO (7) journals for scoring. Measure journals for wear. Replace crankshaft if journals are scored, or worn past reject sizes listed in Section 13. Check oil galleries (4) for blockage or obstructions. Complete instructions are included with undersize connecting rods.
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10 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 INSPECT CAMSHAFT Inspect gear teeth (4), lobes (9, 10), compression release balls (7) and camshaft bearing journals (6, 11) for wear and nicks, Fig. 4. Camshaft journal and lobe reject sizes are shown in specifications page in Appendix. Replace cam gear if not to specification. Governor spool (2) must move freely on PTO journal (6) of camshaft. Flyweight (12) must move freely on pivot (8).
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10 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 158 www.mymowerparts.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 11 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 11 Pistons, Rings and Connecting Rods Page ASSEMBLE PISTON AND CONNECTING ROD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 ASSEMBLE RINGS TO PISTON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162 DISASSEMBLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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11 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 GENERAL INFORMATION Install new piston rings whenever the engine is disassembled for major servicing or overhaul, providing that cylinder bores are within specification. 1. Remove any carbon or ridge at the top of the cylinder bore. This will prevent breaking the rings when removing the piston and connecting rod from the engine. 2. Remove the connecting rod cap.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 11 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 540000, 610000 • Top Compression Ring – 0.030” (0.76 mm) • Center Compression Ring – 0.030” (0.76 mm) • Oil Rings – 0.040” (1.0 mm) Fig. 6 ÎÎ ÎÎ ÎÎ Fig. 4 3. Check piston pin bore, Fig. 5. Replace piston if worn beyond reject dimension or 0.0005” (0.01 mm) out of round. Piston Pin Bore Reject Dimension • Models 290000 – 351000 – 0.674” (17.12 mm) • Model 380000 – 0.711” (18.
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11 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Assemble Piston Rings to Piston Install rings in order shown, Fig. 10. Use Piston Ring Expander, #19340 when installing center (2) and top (1) compression rings. #1 1. Install oil ring expander (4). a. Install lower scraper ring (5). b. Install upper scraper ring (3). Fig. 8 3. Lubricate parts with engine oil. Assemble #2 piston and connecting rod, Fig. 9. • • Arrow, notch or casting mark on piston must face flywheel side.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 12 Engine Assembly Page ENGINE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Install Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Install Piston and Connecting Rod . . . . . . . . . . . .
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ENGINE ASSEMBLY NOTE: The words “OUT-1” (5) on #1 connecting rod must be facing PTO side of engine (6). Install Crankshaft Lubricate mag bearing and lips of oil seal with engine oil. Install crankshaft, Fig. 1. Fig. 3 4. Assemble connecting rod cap to rod with match marks aligned, Fig. 4. Torque screws to 115 in. lbs. (13 Nm). Fig. 1 Install Piston and Connecting Rods NOTE: Models 540000, 610000 – 125 in. lbs. (14 Nm).
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Align timing marks on camshaft and crankshaft timing gear. Install camshaft, Fig. 5. 4. Assemble governor spool (2) to camshaft (except Models 540000, 610000). a. Install new O-ring (3) in cylinder. b. Make sure that spool engages flyweights and slot on spool fits over locating pin (1). Fig. 7 Install Crankcase Cover or Sump 2.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Crankshaft end play is adjusted by adding or removing a thrust washer. Thrust Washer Kit #807625 contains shims with the following thickness; 0.039” (1.0 mm), 0.049” (1.25 mm) and 0.059” (1.5 mm). The thrust washer is installed on the PTO side of the crankshaft next to the timing gear. 2. Assemble rocker studs (1), rocker arm supports and rocker arms (3) to cylinder head, Fig. 11. 3. Torque studs to 100 in. lbs. (11 Nm).
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 13 Fig. 15 2. Install valve covers with new gaskets and valve cover seals (6), Fig. 14. Torque nuts (7) to 25 in. lbs. (3 Nm). Install Flywheel NOTE: Models 540000, 610000 – 70 in. lbs. (8 Nm) CAUTION: Clean flywheel and crankshaft taper. Remove ALL oil, dirt and grease. All models except Engines with POWERLINKt 3. Repeat for No. 2 cylinder. 4.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 350000, 380000 1. Install washer and flywheel nut. 2. Assemble Flywheel Holder #19321 (2) to retainer, Fig. 17. 3. Use a torque wrench (1) and 30 mm socket (3) to torque flywheel nut to 125 ft. lbs. (175 Nm). 4. Install starter hub and screw (if equipped). Torque to 35 ft. lbs. (48 Nm). Install Flywheel – Engines with PowerLinkt NOTE: Before installing flywheel make sure the flywheel magnets are free of debris.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Install Armatures 1. Assemble armature to engine, Fig. 20. 2. Install ground wire onto tab terminal on armatures. NOTE: Mounting holes in armature are slotted. Push armature away from flywheel (arrow) as far as possible. Tighten either screw (4) to hold armature in place. 3. Assemble governor lever (3) to governor shaft. DO NOT tighten nut at this time. 4.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 2. Assemble carburetor onto mounting studs, Fig. 24. Fig. 26 3. Connect choke link (7) to choke lever and install choke control bracket (5), single barrel carburetor, Fig. 27, two barrel carburetor, Fig. 28. Torque screws (6) to 65 in. lbs. (7 Nm). Fig. 24 All Models 1. Connect governor link (3) to throttle lever (1). Snap retainer (2) over link, single barrel carburetor, Fig. 25, two barrel carburetor, Fig.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 ÑÑ ÑÑ Fig. 31 Fig. 29 a. Be sure locating pin (2) in spacer fits in recess (4) in manifold. b. Torque screws to 65 in. lbs. (7 Nm). 2. Install new gaskets (5) and carburetor/manifold assembly (6) to cylinder heads, Fig. 30. Torque screws to 140 in. lbs. (16 Nm). Models 351400, 380400, 540000, 610000 1.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 3. Assemble choke link (6) to choke lever, Fig. 33. 10. Assemble choke link (13) to carburetor and choke lever. Install choke bracket (15). Torque screws to 65 in. lbs. (7 Nm). 11. Install air cleaner elbow support. Torque screw to 65 in. lbs. (7 Nm). 13 15 14 Fig. 35 Install Blower Housing 1. Install blower housing (8), Fig. 36. Fig. 33 a. Torque 6 mm screws to 65 in. lbs. (7 Nm). b.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 4. Install breather deflector (4) and three screws (3). Torque nuts and screws to 65 in. lbs. (7 Nm). 5. Torque nuts and screws to 65 in. lbs. (7 Nm). Make sure air inlet tube is installed correctly to air cleaner base. Make sure air inlet tube (1) is installed correctly in air cleaner base. Fig. 37 Early Style: (Square cartridge) Fig. 38. Fig.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Fig. 41 3. Install breather deflector (2) and two screws (3). Do not tighten at this time. Fig. 43 4. Install two air cleaner support screws (4). Torque screws to 65 in. lbs. (7 Nm). Make sure air inlet tube is installed correctly in air cleaner base. Models 351400, 380400 1. Install new air cleaner mounting gasket (2) with adhesive side toward air cleaner base, Fig. 42. 2.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Final Engine Assembly • Install muffler and exhaust manifold. Torque to 150 in. lbs. (17 Nm). NOTE: Models 540000, 610000 torque screws to 180 in. lbs. (20 Nm). • Install spark plugs. Torque spark plugs to 180 in. lbs. (20 Nm). • Install engine into equipment. • Connect choke and throttle control cables. • Install oil filter. Refill oil. • Static-adjust engine governor (see below). 1.
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12 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 176 www.mymowerparts.
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Section 13 Engine Specifications Page ENGINE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Models 290000, 300000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178 Model 350000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 290000, 300000 Common Specifications NOTE: All dimensions in Inches (Millimeters) Armature Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Torque Values Description Torque Air Cleaner Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Guide Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Block Plate Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Model 350000 Common Specifications NOTE: All dimensions in Inches (Millimeters) Armature Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve Clearance – Measured Cold Intake .
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Torque Values Description Torque Air Cleaner Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Guide Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Block Plate Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Model 380000 Common Specifications NOTE: All dimensions in Inches (Millimeters) Armature Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Torque Values Description Torque Air Cleaner Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Guide Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Block Plate Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Models 540000, 610000 Common Specifications NOTE: All dimensions in Inches (Millimeters) Armature Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crankshaft End Play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Torque Values Description Torque Air Cleaner Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Guide Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Block Plate Mounting Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Vanguardt Engines – Honing Fixture 10” (254 mm) 3” (76 mm) 3-1/4” (83 mm) 1-7/8” (48 mm) 6-11/32” (161 mm) 8-9/16” (217 mm) 10” (254 mm) 2” (51 mm) 8-5/32” (207 mm) 13/32” Thru Hole (4) (10 mm) CLAMP THIS END IN VISE Material: Wood 2” x 10” x 10” (51 mm x 254 mm x 254 mm) Cylinder Mounting Hardware Fasteners Required: 4 @ Crankcase Cover Screws, 4 @ Flat Washers 3/8” (9.5 mm) I.D. 186 www.mymowerparts.
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Starter Motor Support Block A starter motor support block can be made from stock 1” (25.4 mm) thick as shown in Fig. 1. The dimensions for the block are: d. e. f. g. 2” (50.8 mm) 10” (254 mm) 1” (25.4 mm) 3-1/2” (88.9 mm) 1. Drill two holes (1) 3/8” (9.5 mm) diameter for mounting starter. 1. 1” (25.4 mm) 2. 0.4” (10.2 mm) 2.
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 FUEL SYSTEM IDENTIFICATION Model Fuel System Type Color Code 290400 Gravity Yellow 290400 Pump White 294400 Gravity Pump 294400 Pump None 303400 Gravity Blue 303400 Pump None 350400 Gravity Blue 350400 Pump None DIODE FAILURE DIAGNOSIS Switch ON Switch OFF Cause Engine Runs on Only 1 Cylinder Shuts Off OK 1 Closed Diode Engine Runs on Both Cylinders Only 1 Cylinder Shuts Off 1 Open Diode Won’t Run
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LOCKED FOR PRINTING – SELECT SECT. NEEDED > 13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Drill Size – Decimal Equivalent (Inches) 60 0.040 9/64 0.1406 E, 1/4 0.250 59 0.041 27 0.144 F 0.257 58 0.042 26 0.147 G 0.261 57 0.043 25 0.1495 17/64 0.2656 56 0.0465 24 0.152 H 0.266 55 0.052 23 0.154 I 0.272 54 0.055 5/32 0.1562 J 0.277 53 0.0595 22 0.157 K 0.281 1/16 0.0625 21 0.159 9/32 0.2812 52 0.0635 20 0.161 L 0.
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13 For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 English to Metric Conversion Table Fraction 1/64 Decimal 0.0156 mm 0.396 1/32 3/64 1/16 0.0313 0.0469 0.0625 5/64 3/32 7/64 1/8 190 0.795 1.191 1.588 Fraction 33/64 17/32 35/64 9/16 Decimal 0.5156 0.5313 0.5469 0.5625 mm 13.096 13.495 13.891 14.288 0.0781 0.0938 0.1094 0.1250 1.984 2.383 2.779 3.175 37/64 19/32 39/64 5/8 0.5781 0.5938 0.6094 0.625 14.684 15.083 15.479 15.875 9/64 5/32 11/64 3/16 0.1406 0.1563 0.