For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TECUMSEH Service Dealer’s and Technician’s Training and Informational Series Tecumseh Quick Reference Service Information Covers Engine and Transmission Product ENGINES www.mymowerparts.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 IMPORTANT NOTICE! Notice Regarding Emissions This booklet is intended for individuals who have a general understanding of internal combustion engines, adequate training, experience and who practice proper tool usage. Service procedures should be clearly understood and practiced when servicing Tecumseh Engines. NOTE Engines which are certified to comply with California and U.S.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Introduction This booklet contains the quick reference and basic troubleshooting information previously found on Tecumseh wall charts and in the Technician's Handbooks. This booklet is designed to be used as a work bench quick reference guide when servicing Tecumseh engines and motion drive systems. Technician's Note: Tecumseh engines are manufactured to meet EPA and CARB standards.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Contents General Safety Precautions .............................................................................................................................. 1-2 Locating and Reading Engine Model and Specification .................................................................................... 3-5 Quick Reference for Spec. Numbers-To-Model Designation .............................................................................
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 VLV Governor and Linkage ....................................................................................................................30 Engine Speed and Mixture Adjustments.................................................................................................31 Engine Speed Controls and Governor Linkages ..............................................................................
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 General Safety Precautions WARNING Read the original equipment manufacturer’s manual(s) and this booklet thoroughly before servicing Tecumseh engines. Always follow recommended service procedures. Such procedures affect the safe operation of the equipment and the safety of you and/or the operator. Failure to follow the instructions and warnings may result in serious injury or death.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 I. Operate Equipment Safely Operation of equipment presented for service can be hazardous. To avoid serious injury or death, DO NOT operate equipment, until: • all relevant inspection procedures presented in this book are performed and • technician is satisfied equipment can be operated safely. • Starter pulley springs hold the starter rope and control tension by winding the rope around the pulley.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 General Information The following information is being provided to assist you in locating and recording your engine model and specification numbers. This information will be needed to use this book or obtain parts from a local Tecumseh dealer. Model Numbering System for Tecumseh’s Full Engine Line Prior to 2004 Production LOCATING AND READING ENGINE MODEL AND SPECIFICATION THE FOLLOWING WILL BE NEEDED TO LOCATE PARTS FOR YOUR ENGINE.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Model Numbering System for Current Tecumseh’s Full Engine Line Reviewing The Engine ID Label Effective with the 2004 Model Year, we have changes to the engine I.D. label on our products. The following pages will explain the information contained on the label dependent on the age of your product. Specification Number The numbers following the model number make up the specification number.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Model Numbering Identification for Tecumseh’s Full Engine Line CURRENT CODE (effective 2004 production) Prior to 2004 Model Number Conversion Chart 1st Space - Valve Orientation T = Two Cycle O = Overhead Valve 4-Cycle L = L-Head 2nd Space - Crank Orientation V = Vertical H = Horizontal M = Multi-position 3rd, 4th and 5th Space - Displacement LEV90 LEV120 HSSK50 HSSK55 VSK90 OHV135 OHV180 TVT691 VTX691 - LV148EA LV195EA LH195SA LH
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Cross Reference for Specification - To - Model Number Designation This cross reference chart allows you to determine an engine Model Number if you only have the Specification Number.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Cross Reference for Specification - To - Model Number Designation This cross reference chart allows you to determine an engine Model Number if you only have the Specification Number.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TORQUE SPECIFICATIONS Two Cycle Engines NOTES Torque specifications listed should not be confused with the torque value observed on engines which have been run. The torque specifications take relaxation into account so sufficient clamping force exists after an engine has reached operating temperature. Torques listed are intended to cover highly critical areas. More extensive torques are found in the respective repair manual.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TORQUE SPECIFICATIONS Four Cycle Engines NOTES Torque specifications listed should not be confused with the torque value observed on engines which have been run. The torque specifications take relaxation into account so sufficient clamping force exists after an engine has reached operating temperature. Torques listed are intended to cover highly critical areas. More extensive torques are found in the respective repair manual.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Torque Specifications - continued Four Cycle Heavy Frame Engine Series (Cast Iron Block HH, VH and OH) Inch lbs. Torque Engine Designation Connecting Rod 86-110 10-12.5 Cylinder Head 180-240 20.5-27 Mounting Flange & Cylinder Cover 100-130 11-14.5 Rocker Arm Shaft to Box 180-220 20.5-25 Rocker Arm Box to Cylinder Head 80-90 9-10 Flywheel Nut 600-660 68-74.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Two Cycle Troubleshooting As an aid in troubleshooting any piece of equipment, interview the customer, and review conditions and symptoms of the problem. Examine exterior for clues: leaks, excessive dirt, damaged or new parts. Follow safety precautions when working with the fuel system. See page 2-J. Avoid Gasoline Fires.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Two Cycle Troubleshooting - continued IGNITION SYSTEM Engine Will Not Start Check for Spark Spark No Spark Check flywheel for correct key, damaged key or key adaptor Replace spark plug Set proper air gap on external coil Set proper point gap, check condensor and timing (if equipped) Test coil for intermittent or weak spark Check electric starter if applicable Isolate engine from all equipment (disconnect wiring harness), repeat test
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Four Cycle Troubleshooting As an aid in troubleshooting any piece of equipment, interview the customer, and review conditions and symptoms of the problem. Examine exterior for clues: leaks, excessive dirt, damaged or new parts. Follow safety precautions when working with the fuel system. See page 2-J. Avoid Gasoline Fires.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Four Cycle Troubleshooting - continued IGNITION SYSTEM Engine Will Not Start Check for Spark Spark No Spark Check flywheel for correct key, damaged or sheared key Replace spark plug Set proper air gap on external coil Set proper point gap, check condensor and timing Test coil for intermittent or weak spark Isolate engine from all equipment (disconnect wiring harness), repeat test Spark No Spark Equipment problem, check switches, wi
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 CARBURETORS AND GOVERNORS Tecumseh 2-Cycle Diaphragm Adjustments NOTE For meeting emission requirements, some carburetors have fixed-main or idle jets. The absence of the adjustment screw indicates fixed jets and no adjustment is necessary. Diaphragm-Dual Adjustment Turn mixture adjusting screws in finger tight to the closed position, then one (1) turn out from closed position. This setting is approximate.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TC/TM Governor Adjustment Three different styles of governor systems are used on TC/TM engines. Use the following illustrations (diags. 2 and 3) to identify the governor system used and the following procedure to adjust the governed engine speed. TC TYPE I Spring Hooked In Notch 1. Allow the engine to run for at least 5 minutes to reach the operating temperature.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Walbro (WTA, WT) and Tillotson (HU) Diaphragm Adjustment Carburetor Pre-Set and Adjustment Both the Walbro and the Tillotson carburetors used on TC engines have non-adjustable main mixture jets. Only the idle mixture is adjustable by turning the idle mixture screw. Use the following procedure to pre-set the idle mixture screw.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Emissionized TC/Tilloston Carburetor The Tillotson carburetor is an emissions grade carb. It has a married idle and high speed circuitry with limited jet adjustments on the idle (diag. 6). Emissions Carburetor Idle Mixture Adjustment Procedures The carburetor is preset at the factory at a normal setting required for initial engine operation. Allow the engine to reach normal operating temperature (after 3-5 minutes).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 2-Cycle Engine Speed and Governor Adjustments: TVS/TVXL840 IDLE SPEED ADJUSTMENT HIGH SPEED ADJUSTMENT HOLDING SCREW 8 Linkage Location To aid in the proper reassembly of the governor linkage, mark the linkage locations.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Governors and Linkage for Air Vane - continued ADJUST RPM BY LOOSENING SCREW AND SLIDING BRACKET IN DE CR CR EA EA SE SE HIGH SPEED RPM ADJUSTMENT IDLE RPM ADJUSTMENT IDLE MIXTURE THIS HOLE NOT PRESENT ON ALL MODELS SPRING HORIZONTAL FIXED SPEED (ALUMINUM AIR VANE GOVERNOR) ADJUST RPM BY LOOSENING SCREW AND SLIDING BRACKET 14 VERTICAL ENGINE VARIABLE SPEED-REMOTE CONTROL 15 SPRING GOVERNOR LINK IN DE CR CR EA EA SE SE IDLE RPM
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 4-Cycle Static Governor Adjustments The purpose of making a static governor adjustment is to remove all free-play between the governor spool and the carburetor (diag. 20). Any free-play here will result in hunting/surging or erratic running. After completing this procedure, always re-check the engine speeds using the steps outlined in the following pages.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Governor Shaft Pressed In Depth When assembling governor shaft into a flange or cover mounting boss, refer to this chart for exposed shaft length. Engine Model Exposed Shaft Length ECH 90 ECV 100 H30, 35 HS40, 50 LAV (all) LEV (all) LV (all) OH, OHH (all) OVRM (all) OV195 TNT100, 120 TVS (all) VLV (all) Mounting flange to top 1.319 - 1.334" (33.502 - 33.883 mm) TVM (all) V50, 60, 70 VH50, 60, 70 Mounting flange to top 1.581 - 1.596" (40.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Small Frame, Vertical and Horizontal* Models: LAV35,40,50 - H25,30,35 - HS40,50 - HSK - HSSK -TNT100,120 - ECH90 - TVS75,90,105,115,120 - OVRM ALL - ECV100,105,110,120 - ALL LEV, LV and LH195 Retainerless Governor System for Small Frames* SPOOL RETAINING RING UPSET ROLLED SPOOL SHAFT RETAINING RING GEAR ASSY. (GOV.) GEAR ASSY. (GOV.) WASHER WASHER NOTE: Gear assembly must have .010 - .020 (.25 - .
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Medium Frame Horizontal OHM120 - OHSK 80-130 - OH318 - OH358 Models: HH60,70 - H50,60,70 - HM70,80,100 HMSK - LH318 - LH358 SPOOL SHAFT WASHER RETAINING RING ROD ASSY. (GOV.) GEAR ASSY. (GOV.) SPOOL WASHER WASHER RETAINING RING GEAR ASSY. (GOV) SHAFT BRACKET SCREWS OVM120, OVXL120, 125 - OHV11-17 OV358 - OV490 OH120, 140, 160, 180 SPOOL SPOOL WASHER RETAINING RING WASHER GEAR ASSY. (GOV.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 OH195 / OHH TVT / VTX / OV691 SPOOL SPOOL CLIP SHAFT GEAR ASSY. (GOV.) GEAR ASSY. (GOV.) WASHER www.mymowerparts.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed and Mixture Adjustments NOTE Starting and operating problems may exist when engines are used at high elevations (over 4,000 feet above sea level). In cases where a fixed main carburetor is used, refer to Bulletin 110 for correction.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Mixture Adjustment Procedure for Adjustable Carburetors Once the speed control bracket is adjusted, the main and idle fuel mixtures can be adjusted. Start the engine and allow it to warm up to normal operating temperature (3 - 5 minutes). Set the speed control to the HIGH or FAST position, then turn the main mixture adjustment screw in (clockwise) slowly until the engine begins to run erratic (lean). Note the position of the screw.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Common Engine Speed Controls and Governor Linkages LOW SPEED ADJUSTMENT SCREW HIGH SPEED ADJUSTMENT SCREW LOW SPEED TAB HIGH SPEED TAB HIGH SPEED PIN POSITION DECREASE TOOL (670326) 28 BEND BEND TVS, LEV SNAP IN CONTROL BEND BEND SPEED ADJUSTMENT TAB INCREASE 29 TO INCREASE SPEED TO DECREASE SPEED TO INCREASE SPEED TO DECREASE SPEED BEND CONTROL BRACKET TO SET RPM 30 THROTTLE CRACK SCREW IDLE MIXTURE SCREW MAIN MIXTURE S
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Common Engine Speed Controls and Governor Linkages - continued HIGH SPEED RPM ADJUSTMENT SCREW HIGH SPEED RPM ADJUSTMENT SCREW IDLE SPEED CRACK SCREW TVS, LEV AND LV ENGINE"S WITH PRIMER STYLE CARBURETOR AND REMOTE SPEED CONTROL 34 BEND BEND VERTICAL SHAFT ENGINES NOTE: ON REMOTE CONTROL THIS WILL NOT BE PRESENT TO INCREASE SPEED TO DECREASE SPEED 35 HIGH SPEED ADJUST LOW SPEED ADJUST TNT 100 VERTICAL ENGINES 36 TYPICAL LATE MO
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 VLV Governor and Linkage TWIST COUNTERCLOCKWISE TO DISCONNECT Static Adjustment - Governor With the engine stopped, loosen the screw holding the governor lever to the governor shaft. Push the governor lever up to move the carburetor throttle plate to the wideopen throttle position. Rotate the governor rod in the same direction. Hold the lever and rod in this position while tightening the screw (diag. 38).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed and Mixture Adjustments Medium Frame Vertical Shaft Engines To adjust high speed on an up/down control (diag. 41) bend the adjustment tab. Low speed is adjusted by a screw at the bottom of the control bracket. Both the governor override system and the up/down speed control have a governed idle. On these systems it is important to also adjust the throttle crack screw.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed Controls and Governor Linkages HIGH SPEED PIN POSITION LOW SPEED TAB HIGH SPEED TAB NOTE: ON REMOTE CONTROL THIS WILL NOT BE PRESENT HIGH SPEED ADJUST LOW SPEED ADJUST DECREASE INCREASE LEV, LV / TVS, OVRM SNAP IN CONTROL 43 TYPICAL LIGHTWEIGHT VERTICAL WITH MANUAL SPEED CONTROL 44 TYPICAL LIGHTWEIGHT VERTICAL WITH REMOTE SPEED CONTROL 45 STANDARD TVM ENGINE WITHOUT GOVERNOR OVERRIDE 46 SPEED CHANGES APPROXIMATELY
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed Controls and Governor Linkages - continued Horizontal Shaft Engines IDLE SPEED CRACK SCREW IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW HORIZONTAL LIGHTWEIGHT HIGH SPEED RPM ADJUSTMENT SCREW LIGHTWEIGHT R.V.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed Controls and Governor Linkages - continued Horizontal Shaft Engines IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW MEDIUM FRAME 56 HM80-100, LH318, LH358 SERIES 57 WINTER APPLICATION CONTROL GOVERNED IDLE LINK AND ADJUSTMENT HIGH SPEED ADJUSTMENT HIGH SPEED ADJUST BEND TO ADJUST SPEED DECREASE INCREASE OHH - OH195 REMOTE & MANUAL 59 OHH - OH195 FIXED SPEED 58 T-10 (TORX) THROTTLE CRACK SCREW GOVERNED HIGH
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Speed Adjustments 8-18 HP, Cast Iron Governor Adjustment for Horizontal Engines Move the remote controls to the RUN position. Loosen Screw "A". Pivot plate "B" counterclockwise and hold. Move lever "C" to left. Tighten screw "A" securely. When the governor is properly set the carburetor throttle lever will be in a wide open position when the controls are set for starting.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TVT / VTX / OV691 Governors and Linkage General Information The TVT / VTX / OV691 engine is equipped with an internal mechanical governor. The governor’s function is to maintain a R.P.M. setting when engine loads are added or taken away. This chapter includes governor assembly linkage illustrations to aid in governor or speed control assembly.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Engine Overspeed 1. If the engine runs wide open (faster than normal), shut the engine off immediately. WARNING Failure to shut off the engine if overspeeding, can result in serious injury or death. 2. Check the condition of the external governor shaft, linkage, governor spring, and speed control assembly for breakage or binding. Correct or replace binding or damaged parts. 3.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 GOVERNOR SERVICE Static Adjustment - Governor With the engine stopped, loosen the screw holding the governor lever to the governor shaft. Push the governor lever up to move the carburetor throttle plate(s) to the wide-open throttle position. Rotate the governor rod in the same direction. Hold the lever and rod in this position while tightening the screw (diag. 70).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Synchronizing the Carburetors Some TVT / VTX / OV691 series use twin carburetors, which MUST be synchronized if the linkage or carburetor body has been disturbed. The following step by step procedures must be followed to synchronize both the throttle and choke. Inspect all link connectors. If excessively worn or damaged replace them. To perform this service the carburetors must be mounted and all linkage must be connected. 1.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 6. Connect both carburetors by attaching the link and link connector bushing clip to the # 1 carburetor. 7. Hold the throttle plate on the #2 carburetor in the true idle position. (Screw against the tang). NOTE Do not set the gap using the idle R.P.M. adjustment screw. Use a .010” (.254 mm) feeler gauge to set the air gap between the idle R.P.M. adjustment screw and the throttle plate tang on the #1 carburetor (diag. 77).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 ELECTRICAL SYSTEMS Switches, Sensors and Solenoids Low Oil Shutdown Switches Check the L.O.S. switch while it is in the engine. The engine must be level, and the oil level at the full mark. Place the speed control in the run position. Remove the spark plug wire from the spark plug. Install a gap type tester connected to the spark plug wire and a good engine ground. Spin the engine over using the electric or recoil starter.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Switches, Sensors, and Solenoids - continued Low Oil Sensor This sensor must use a #194 bulb, resistance of the bulb MUST be .27 ampere in series with the sensor for proper operation and to prevent sensor damage. Remove the sensor from the engine and attach the electrical plug. Attach a jumper lead from an engine ground to the threaded portion of the sensor. Place the keyswitch in the run position.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Wiring CONDITION. All wiring must be fully insulated between connection points, securely fastened and free of foreign material (such as rust and corrosion) at the connection points. This is especially important in the use of batteries where much of the potential may be lost due to loose connections or corrosion. Remember to check the insulation on the wire. All it takes is a pin hole for a wire to "ground out" on the engine or frame.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Diodes In order to charge a battery it is necessary to convert alternating current (A.C.) to direct current (D.C.) This is accomplished by using a diode or rectifier. Using a single diode will make use of one half of the A.C. signal and is known as HALF WAVE RECTIFICATION. This is acceptable in certain applications. In certain situations it is necessary to make use of the entire A.C. signal.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Key Switches Switches are the common point on the vehicle where most of the wiring centrally comes together. There are many varieties of switches available. Replace damaged or failed switches according to the equipment manufacturer's specifications. NEVER substitute an automotive switch for a switch replacement on a small engine application, or a switch from an engine with a battery ignition. A. B. C. D. E. F.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Continuity Check for Switches Switch A Connect Ohmmeter Leads to: S&G S&B X M&S X S&G X M&S X M&S X X X M&B X M&G X X X S&L X R & B, R & A X X B&L X X A&G A&S X A & R, A & B X S & M, S & R, S & G (3) X X A&M X A&S X G&B X X G&S X X B&M X B&S X R&B X G&M X M & R, M & B X A&B X A & M, A & G (3) Continuity w / key in run position X Switch F Connect Ohmmeter Leads to: Switch C Connect Ohmmete
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Charging System 1 AMP (18 WATT) A.C. - ADD-ON ALTERNATOR 350 Milliamp 611077 (Alternator Only) Red ENGINE CENTERING TUBE RECOIL STARTER ADD-ON ALTERNATOR 34960 Red 34990 ALTERNATOR SHAFT A.C. CONNECTOR D.C. CONNECTOR Black Yellow Red 35493 Brown SELF-TAPPING SCREWS 18 Watt A.C. Lighting 611111 3 Amp A.C. 610981 Yellow wire under sleeve Green Black Red 3 Amp D.C. 610968 Red 3 Amp A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Charging System - continued 3 Amp D.C. 611113 2 and 3 Amp D.C. 611116 (3 AMP) Red Green Green DIODE Red 3 Amp DIODE Red 2 Amp (requires optional flywheel) 5 Amp D.C. 611176 3 Amp D.C. - 5 Amp A.C. 611104 Red Yellow Yellow Red Yellow DIODE Red Yellow * Uses regulator/rectifier 611175A 7 Amp D.C. 610975 7 Amp D.C. 610818 Yellow Green Red Green Yellow Red Yellow * Uses regulator/rectifier 610749 Yellow - Alternator A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Charging System - continued 7 Amp D.C. 611097 7 Amp D.C. 611256 Red Yellow Yellow Green Green Green Yellow Green Red Yellow Red Yellow Red Yellow * Uses regulator/rectifier 611098; an open circuit D.C. voltage check cannot be made. 10 Amp D.C. 10 Amp D.C. 610761 Green Yellow Red Yellow Yellow Green Yellow Yellow Black Green * Uses regulator/rectifier 610749 10 Amp Alternator 611159 Green Yellow Yellow - Alternator A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Charging System - continued 20 Amp Alternator 610902 12 Amp D.C. Green Yellow Yellow Yellow Yellow Red Yellow Yellow Green Red Black Green * Uses regulator/rectifier 610996 or 610907A; depending on spec. number; an open circuit D.C. voltage check cannot be made.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Testing Procedures When testing Alternator/Charging System: DO NOT disconnect positive lead(s) from the battery while the engine is running. With the engine stopped, disconnect lead(s), then perform test and stop engine before re-connecting. Connecting or disconnecting while the engine is running will send a voltage surge through the regulator, causing damage. CAUTION D.C. Charging Adaptor Rectifier Bridge Check With Ohmmeter for D.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 350 Milliamp Charging System (+) POSITIVE LEAD CHECKING THE SYSTEM: The battery must be in the circuit to perform the test properly. Set the voltmeter to the 0-20 D.C. volt scale. Connect a voltmeter across the battery. The voltmeter should read battery voltage. Start the engine. With the engine running, there should be an increase in the voltage reading.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 1 Amp (18 Watt) Add-on Alternator CHECKING THE SYSTEM: To check the system, disconnect the plug from the rest of the lighting system. Connect a No. 4414, 18 watt bulb in line with each terminal in the plug. Start the engine and test the circuit using a voltmeter as shown (diag. 97). Yellow With the engine running the minimum A.C. voltage values across the bulb should be: Yellow 2000 R.P.M. - 8.0 Volts A.C. 3000 R.P.M. - 10.5 Volts A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 2 and 3 Amp DC Alternator System - Diode in Harness Models: H30-35, HS40, H50-60, HH50-60, HM7080-100, HMSK, HHM80, HSK, HSSK, LH195, LH318, LH358 Rotary Mower Engines Green This system has a diode included in the red wire which converts the alternating current (A.C.) to direct current. The direct current (D.C.) is used to provide a trickle charge for the battery.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 3 Amp D.C. Alternator System - Rectifier Panel This 3 Amp system is readily identified by the rectifier panel in the circuit. The panel includes two diodes and a fuse for overload protection. The rectifier panel does not regulate the output of this system. CHECKING THE SYSTEM: Check the fuse to determine if it is good. A continuity light or ohmmeter can detect a faulty fuse. Replace with a six (6) Amp fuse if necessary.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 3 Amp D.C. 5 Amp A.C. Alternator Models: OVM/OVXL 12.5, OHV12.5-18.0, OV358, OV490 This unit combines a 3 Amp D.C. system used to charge a battery and a 5 Amp A.C. system used for lighting. Located in the red wire of the harness is a diode which converts the alternating current to direct current for charging the battery. The yellow wire provides the A.C. voltage for the lighting circuit. RED LEAD DIODE 3 AMP D.C. BLACK LEAD 5 AMP A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Models OVM/OVXL/OHV (Read between Engine and Diode, diag. 108 and 109) A.C. With the engine running the minimum values should read: 2500 R.P.M. - 20.0 Volts A.C. 3000 R.P.M. - 25.0 Volts A.C. 3300 R.P.M. - 26.5 Volts A.C. 3600 R.P.M. - 29.0 Volts A.C. Red DIODE Models OHV13.5-17.0 (Read between Engine and Diode) 2500 R.P.M. - 17.0 Volts A.C. 3000 R.P.M. - 21.0 Volts A.C. 3600 R.P.M. - 24.5 Volts A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 All Models With the engine running the minimum values should read: HEAD & TAIL LIGHT 2500 R.P.M. - 20.0 Volts A.C. 3000 R.P.M. - 25.0 Volts A.C. 3300 R.P.M. - 26.5 Volts A.C. 3600 R.P.M. - 29.0 Volts A.C. Yellow Green Yellow If low or no voltage is experienced, replace the alternator. If the alternator puts out the minimum A.C. voltage, replace the diode. IGNITION GROUND STOP LIGHT 3 Amp A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 5 Amp Alternator System RegulatorRectifier Under Blower Housing CHECKING THE SYSTEM: An open circuit D.C. voltage check cannot be made with this system. If a known good battery fails to maintain a charge, proceed in making an A.C. voltage test. To do this, the blower housing must be removed, and the regulator-rectifier must be brought outside of the blower housing. Disconnect the red D.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Check for a defective ammeter, wiring, etc. If less than the above readings, disconnect the plug from the regulator-rectifier, and insert the A.C. voltmeter probes in the two outside terminals (diag. 114). With the engine running the minimum values should read: A.C. 2500 R.P.M. - 12.0 Volts A.C. 3000 R.P.M. - 14.0 Volts A.C. 3600 R.P.M. - 18.0 Volts A.C. If the minimum readings are noted, the regulatorrectifier is defective.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 10 Amp A.C. Alternator CHECKING THE SYSTEM: Unplug the connector at the wiring harness supplied by the O.E.M. Proceed to make an A.C. output check. Place one lead of the A.C. voltmeter into the center of the connector. Place the other lead to engine ground (diag. 117). A.C. OUTPUT YELLOW A.C. With the engine running the minimum values should read: 2500 R.P.M. - 16.0 Volts A.C. 3000 R.P.M. - 20.0 Volts A.C. 3300 R.P.M. - 22.0 Volts A.C.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 16 Amp Alternator System with External Regulator D.C. OUTPUT - RED CHECKING THE SYSTEM: An open circuit D.C. voltage check cannot be made with this system. If a known good battery fails to maintain a charge, proceed in making an A.C. voltage test. Disconnect the red D.C. output connector at the wire harness and connect the probes from an A.C. voltmeter to the wire terminals at the regulator-rectifier (diag. 120).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Standard Wiring Harness Connector Adapters In an effort to standardize all of the connectors on our wiring harnesses, we have created new connectors to match O.E.M. standard wiring. No matter what size of alternator our large frame engines are equipped with the connector and will have six wire positions with the wires going into assigned positions. Connector part #611296 is set up for engines with a 3/5 split alternator.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TECUMSEH AND PEERLESS® MODEL AND SPECIFICATION NUMBERS The following information is being provided to assist you in locating and recording your Tecumseh transmission components model and specification numbers. This information will be needed to use this book or obtain parts from a local Tecumseh dealer.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Various Styles of Identification Used On Tecumseh and Peerless Transmission, Transaxle and Gear Products MOD 506 PEERLESS 1 275 1374 SPECIFICATION NUMBER REQUIRED FOR WARRANTY MODEL NUMBER REQUIRED FOR WARRANTY Individual Serial Number Manufactured on the 275th Day Manufactured in 1991 MODEL NUMBER REQUIRED FOR WARRANTY D.O.M. (DATE OF MANUFACTURE) ORIGINAL SERIAL NUMBER SPECIFICATION NUMBER REQUIRED FOR WARRANTY D.O.M.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Transaxle Troubleshooting In-Line Shift Models (i.e. 800, 820, 915, 920, 930, MST) Transaxle troubleshooting can be a mystery to many technicians, but by using a common sense approach that most technicians use for engine troubleshooting, the mystery will disappear and be replaced with confidence, skill and eventually, mastery of transaxle service.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Hard Shifting Transaxles and Drive Belts 1/16" to 3/16" (1.6 mm - 4.8 mm) THIS DIMENSION VARIES FROM EACH MANUFACTURER Often hard shifting is blamed on an internal problem in the transaxle. To determine if the problem is transaxle or equipment related make these simple checks. 1. Turn the unit off so that all power is removed to the transaxle. 2. With the unit off move the shift lever through the shift gate.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Tecumseh and Peerless Transmission, Transaxle and Gear Products NOTE Before troubleshooting any system problem, see original equipment manufacturer’s (O.E.M.) instructions. Make your troubleshooting easier by preparing as follows: • Work in a clean, well-lighted place. • Keep proper tools and materials nearby. • Keep an adequate supply of clean petroleum-based solvent.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Tecumseh LTH-2000 Series Transaxle Troubleshooting - continued BRAKE NOT WORKING LEAKING LUBRICANT DOES NOT DRIVE UNIT IS NOISY SYMPTOM PROBLEM CORRECTIVE ACTION Final drive gear noise Check, add gear oil to final drive Check, replace worn gears Check, replace worn bearings Hydrostatic transmission noise Replace hydrostatic transmission Mechanical disconnect not properly engaged, check for obstruction Transaxle clicking Check,
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Check Fluid Level on Hydrostatic Transmission • After THROUGHLY cleaning the outside of the case near the expansion tank, and the chassis. Carefully remove the expansion tank. • Insert the scale through the expansion tank opening until it stops, at about 5-5/8" (142.8 mm). • The oil level should be between 3-5/8" and 4-3/8" (92.07 mm and 111.27 mm). (2.0" to 2.75" [64.69 mm - 69.85 mm] if measured from the top of casting.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 1800 / VST Troubleshooting The information on this page has been provided to help understand the internal operation of the VST. Do not use this information to attempt any internal repairs. Tecumseh's current policy on hydrostatic transaxles that have internal failures is to replace the complete unit. This has not changed.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Replacing Bellows or Adding Oil The following step by step procedure MUST be followed exactly if a proper repair is to be done. 1. Before assuming the transaxle has an internal problem causing low power or slow speed, it is critical to check the belt system. Many problems of this nature are in fact a glazed or worn belt, a damaged pulley or a tension problem requiring service. ✔Check Equipment 129 2.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 5. To prepare the “NEW” bellows for installation, place the bellows on the cover as shown. Then compress the bellows and place a piece of tape over the hole to keep it compressed during installation. 133 This can also be done by using a refrigerator magnet cut to cover the hole. (The new bellows cover comes with only one hole in the center and seals very easily). 134 When reusing the old cover it is difficult to seal all five holes.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Tecumseh and Peerless® Lubrication Requirements NOTE Use ONLY the recommended lubricant in all models as listed to insure proper operation and long life. TRANSAXLES Model No.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Peerless Torque Chart TORQUE VALUE PART MODELS AFFECTED IN-LBS FT-LBS Nm Bolt 5/16-18 (Housing) Nut 5/16-18 (Drive Gear) 100 Series 100 Series 228-264 120-156 19-22 10-13 25.8 - 29.9 13.6 - 17.7 Bolt 1/4-20 (Case to Cover) Bolt 5/16-18 (Axle Support Housing) Bolt 1/4-20 (Shift Lever Housing) Bolt 1/4-20 (Brake Disc) 600 Series 600 Series 600 Series 600 Series 84-108 156-180 84-108 84-108 7-9 13-15 7-9 7-9 9.5 - 12.2 17.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TECUMSEH 4-CYCLE LUBRICATION REQUIREMENTS Tecumseh recommends the use of a high quality, brand name oil with a minimum classification of SL/SJ. Very few air cooled engines have any type of oil filtration system, making regular oil changes critical to remove TECUMSEH 4-CYCLE ENGINE OIL shown with model names prior to 2004 CLASSIFICATIONS: “SL/SJ" DO NOT USE 10W40 CAPACITIES: Engine Model ml All LAV, TVS, LEV, OVRM .........................
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 TECUMSEH 2-CYCLE ENGINE OIL REQUIREMENTS The proper type and ratio of 2-cycle oil is critical to long life and low maintenance of the engine. The use of non-certified oils and improper mix ratio’s can cause severe engine damage and possibly void warranty consideration.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Spark Plug Replacement NOTE: Only models which will continue to be manufactured long term will have an updated Model designation.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Spark Plug Replacement NOTE: Only models which will continue to be manufactured long term will have an updated Model designation.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Head Bolt Torque Sequence LEV, TVS75-120, H, HSK30-70, HS, HSSK40-50, V50-70, TVXL105-115, TVM125-140 Torque bolts in 50 in. lb. (5.5 Nm) increments. TVM-TVXL170-220, VM, HM, HMSK80-100 Torque bolts in 50 in. lb. (5.5 Nm) increments. HH, VH80-120 Torque bolts in 50 in. lb. (5.5 Nm) increments. OHV11-17, OH120-180, OHM, OHSK, OVM, OVXL Torque bolts in 60 in. lb. (7 Nm) increments.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Valve Clearance Valve Clearance (Cold) * ±.002 (.05 mm) Engine Model LAV35,50 LEV80-120, LV195 TVS75-120 ECV & TNT100-120 H30-35 & HS40-50 VLV40-6.75 TVT (V-Twin), VTX TVM125-220 V & VH50-70 H & HH50-70 HM70-100 & HHM80 LH318 - 358 OHSK80-130, OHM, OVM120 OVXL120 & OHV11-17, OV318, 358, OV358, OV490 HH100-120 OH120-180 OVRM40-6.75, OV195, OH195 OHH/OHSK50-70 HSK60-70 HMSK80-100 Intake Valve Exhaust Valve .006" (.004" - .008") .15 mm (.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Recoil Quick Reference Parts During the past few years we have introduced you to several new styles of recoil assemblies. These recoils are used on all small and medium frame series engines. To assist you in making repairs, we have developed the quick reference illustrations below. By looking at the direction and style of ribs between the inner and outer parts of the pulley, you can use this chart to obtain the correct parts.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Flywheel Key Quick Reference Identification Chart - Keys are shown actual size. 650592 32589 611191 650455 611054 611298 650496 610951 610961 30884 Steel Steel Aluminum Alloy Steel Steel Steel 611004 Aluminum Alloy Crankshaft Timing Tabs 611014A Point Ignition Steel Steel 611154 Aluminum Alloy Steel Steel 610995 Aluminum Alloy 611107 Aluminum Alloy Crankshaft Timing Tabs www.mymowerparts.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Primer Bulb Identification Caution must be used when replacing carburetor primer bulbs. Using the wrong primer bulb could cause hard starting and operating problems. Currently, Tecumseh uses five different carburetor mounted bulbs. To avoid problems, use the Master Parts Manual for the correct application. The primer bulbs offered feature two different shapes; derby and stepped (or hourglass).
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Piston Ring Installation Piston ring orientation: Compression rings may have either an inside chamfer or an outside notch. Inside chamfers always face up towards the top of the piston. Outside notches, which are generally the second compression ring always face down towards the skirt of the piston.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Quick Reference for Dipsticks SCREW-IN DIPSTICK FEMALE THR’D, PLASTIC TUBE LARGE SCREW-IN DIPSTICK MALE THR’D, METAL TUBE LARGE TWIST-LOCK SERVICE NO. ID NO. SERVICE NO. ID NO. SERVICE NO. ID NO.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Metric Conversions Factors (approximate) Conversions TO Metric Measures Symbol When You Know Multiply By To Find Symbol in. inches 25.4 millimeters mm in. inches 2.54 centimeters cm ft. feet 30 centimeters cm yd. yards 0.9 meters m mi. miles 1.6 kilometers km MASS (weight) oz. ounces 28 grams g lb. pounds 0.45 kilograms kg VOLUME tsp. teaspoons 5 milliliters ml Tbsp.
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Notes __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ ______________________________________________________________
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983 Tecumseh Power Company Tecumseh Europa S.p.A. 900 North Street Strada delle Cacce, 99 Grafton, WI 53024 10135 Torino, Italy Phone: 262-377-2700 Tel. (39) 0 11 391-8411 Fax: 262-377-4485 Telefax (39) 0 11 3910031 www.TecumsehPower.com Form No. 695933 R 10/05 Litho in U.S.A. www.mymowerparts.
