Manual No. A8927 ® GENERAC ENGINES Overhead Valve Industrial Owner’s Manual Model No. GN - 320/360/410 (11/13/15 Horsepower) THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS, WHICH, IF NOT FOLLOW E D, COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THE MANUAL BEFORE ATTEMPTING TO OPERAT E THIS UNIT. Revision 0 (11/16/98) Printed in U.S.A.
Generac GN-320/360/410 Engine RULES FOR SAFE OPERATION If you don’t understand any portion of this manual, contact Generac for a demonstration of actual starting, operating and servicing procedures. Study these RULES FOR SAFE OPERATION carefully before operating or servicing this equipment. Become familiar with the OWNER’S MANUAL and with the engine. The engine can operate safely, efficiently and reliably only if it is properly operated and maintained.
Generac GN-320/360/410 Engine • Do not overfill the fuel tank. Always allow room for fuel expansion. If the tank is overfilled, the fuel can overflow onto a hot engine and cause a FIRE or an EXPLOSION. • Allow at least two (2) feet of clearance on all sides of the engine, even while operating it outdoors, or you could damage the engine. • Thoroughly inspect the engine for loose or damaged parts before each use. Do not use the engine until adjustments or repairs are made.
Generac GN-320/360/410 Engine This engine meets the 1998 and later California emissions regulations. To ensure that your engine continues to meet these regulations, refer to the following information and instructions in this owner’s manual. SERVICE INFORMATION Service on this engine within and after the warranty period can be performed by any authorized service dealer. Service technicians are factory trained and capable of handling all service needs.
Generac GN- 320/360/410 Engine OIL AND FUEL INFORMATION The recommended oils include the following: NOTE: BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO START OR OPERATE THIS EQUIPMENT. Using old or improper oil or fuel can cause engine damage. • During summer months: SAE 10W-30, • During winter months: SAE 5W-20 or 5W-30. DO NOT USE SAE 10W-40. The crankcase oil capacity is about 1500 ml (51 oz.) with the oil filter. Without the filter, the oil capacity is 1350ml (46 oz.).
Generac GN-320/360/410 Engine OPERATION AND MAINTENANCE STARTING THE ENGINE It is the owner’s/operator's responsibility to perform all safety checks; to make sure that all maintenance for safe operation is performed promptly; and to have the engine checked by an authorized dealer periodically. Normal maintenance service and replacement of parts are the responsibility of the owner/operator and, as such, are not considered defects in materials or workmanship within the terms of the warranty.
Generac GN-190/200 Engine A If the engine FAILS TO START, go to Step 3. B. If the engine STARTS, go to Step 4. Figure 4 — Recoil Handle STOPPING THE ENGINE 1. Remove the load on the engine, and let it run for 30 seconds. 2. Turn off the engine by moving the RUN/STOP SWITCH to the STOP position. 3. Close the fuel shut-off valve, if so equipped.
Generac GN-320/360/410 Engine GENERAL MAINTENANCE RECOMMENDATIONS 2. When the oil is drained, install and tighten the oil drain plug. The owner/operator is responsible for making sure that all periodic maintenance tasks are completed on a timely basis; that all discrepancies are corrected; and that the equipment is kept clean and properly stored. Never operate a damaged or defective engine.
Generac GN-320/360/410 Engine CAUTION: Never run this equipment without the complete air cleaner system installed on the engine. This could result in premature wear to the engine. Use the following instructions to clean or replace the air cleaner components. 1. Loosen the two screws on the air cleaner cover. Remove the air cleaner cover (Figure 6). Figure 6 — Removing the Air Cleaner Cover 3. To clean or replace the foam pre-filter: A. Wash the pre-filter in soapy water. B.
Generac GN-320/360/410 Engine 3. Set the spark plug gap (Figure 8) to 0.76mm (0.030 in.). Install a correctly gapped spark plug into the cylinder head. Figure 9 — Removing Heat Shield Figure 8 — Setting Spark Plug Gap SET PLUG GAP AT 0.76 mm (0.030 inch) Spark Arrestor Screen 83083 CLEANING THE SPARK ARRESTOR SCREEN The engine exhaust muffler has a spark arrestor screen. Inspect and clean the screen every 100 hours of operation or once each year, whichever comes first.
Generac GN-320/360/410 Engine 3. Loosen the rocker arm jam nut. Using an allen wrench to turn the pivot ball stud, check the clearance between the rocker arm and the valve stem with a flat feeler gauge (Figure 11). CARBURETOR ADJUSTMENTS The carburetor of your engine is pre-set at the factory. The carburetor should not be tampered with because this will VOID THE EMISSION CONTROL SYSTEM WARRANTY.
Generac GN-320/360/410 Engine RETORQUING THE HEAD BOLTS After the first 50 hours of operation, retorque the head bolts. Figure 12 — Tightening Sequence D NOTE: Only perform this adjustment after the first 50 hours of operation. The head bolts will need no further adjustment. B 1. Remove the four (4) screws from the rocker cover (see Figure 10). 2. Remove the rocker cover and rocker cover gasket. 3. Torque the bolts to 6.9 kg-m. (44 ft-lb). 4.
Generac GN-320/360/410 Engine STORAGE INSTRUCTIONS OTHER STORAGE TIPS This engine should be started at least once a week and run for at least 30 minutes. If this cannot be done and the equipment must be stored for more than 30 days, use the following guidelines to prepare it for storage. WARNING: Never store the engine with the fuel in the tank indoors or in an enclosed, poorly ventilated areas, where fumes can reach an open flame spark or pilot light as on a furnace, water heater, or clothes dryer. 1.
3C Generac GN-320/360/410 Engine — 14 — 10C 21A 21B EXPLODED VIEW — LONG BLOCK (GN-320/360/410) 4C
Generac GN-320/360/410 Engine REPAIR PA RTS LIST — LONG BLOCK (GN-320/360/410) ITEM 1 PART NO. 71978 QTY.
Generac GN-320/360/410 Engine EXPLODED VIEW — AIR CLEANER AND CARBURETO R 43A 43B 43C — 16 —
Generac GN-320/360/410 Engine AIR CLEANER AND CARBURETO R ITEM 31 32 33 34 35 36 37 38 39 40 41 42 43A 43B 43C DESCRIPTION PART NO. Breather Hose 72745 Manifold Head Gasket 91039 M6 x 20 SHCS 40945 Carburetor Bolt 81647 M6 x 12 HHCS 66476 K Adapter 91028 M6 Lock Washer 22097 M6 Hex Nut 49813 Carburetor/Air Box 90970 Gasket M6 Ribbed Lock93873 washer Spitback Plate 91204 Carburetor/Manifold 89228 Gasket 320 Nikki Carburetor 93302A 360 Nikki Carburetor 91187A 410 Nikki Carburetor A4600 QTY.
Generac GN-320/360/410 Engine EXPLODED VIEW — GAS TANK MOUNTING HARDWARE ITEM PART # 22 26 94 95 96 97 98 99 100 40976 22129 B2348 52858 59012 96083 96084 89263 A6558 QTY. 2 2 1 2 2 1 1 1 1 — 18 — DESCRIPTION SHCS M8-1.
Generac GN-320/360/410 Engine EXPLODED VIEW — OIL FILTER AND OPTIONAL OIL FILL TUBE ITEM PART # QTY.
Generac GN-320/360/410 Engine EXPLODED VIEW — LOW OIL SHUTDOWN AND GOVERNOR ITEM PART # QTY. ITEM PART # DESCRIPTION QTY. DESCRIPTION 7 78653 1 Run/Stop Switch 21 72734 1 Governor Lever 8 85272 1 LED Assembly 23 83502 1 Adjust Screw 9 93104 1 L.O.S. Decal 24 83512 2 M8 X 15 Taptite 10 93611 1 Black Sleeving 25 73100 1 60Hz Gov. Spring 12 84329 1 3 Pin Male HSG 27 83503 1 M5 Lock Nut 13 92981 1 Wire Assembly 28 73101 1 Governor Brkt.
Generac GN-320/360/410 Engine EXPLODED VIEW — STEPPER MOTOR, F LYWHEEL, RECOIL STA RTER ITEM PART # QTY. DESCRIPTION 81 67890 1 M20 Hex Nut 82 88433 1 Top Wrapper 83 45756 7 M6 X 10 Taptite 84 78609 2 Cover Bolts 85 73104B 1 Air Box Cover DESCRIPTION 86 92437 1 Blower Housing ITEM PART # QTY. 17 21544 1 Starter Motor Assm. 87 88434 1 Lower Wrapper 22 40976 2 SHCS M8 — 1.
Generac GN-320/360/410 Engine CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS The California Air Resources Board ("CARB") and Generac Corporation are pleased to explain the Emission Control System Warranty on your new utility or lawn and garden equipment engine. In California, new utility and lawn and garden equipment engines must be designed, built and equipped to meet the State's stringent anti-smog standards.
Generac GN-320/360/410 Engine EMISSION CONTROL SYSTEM WARRANTY Emission Control System Warranty ("ECS Warranty") for 1995 and Later Model Year Utility and Lawn and Garden Equipment Engines: A. Applicability: This warranty shall apply to 1995 and later model year utility and lawn and garden equipment engines.
Generac GN-320/360/410 Engine GENERAC POWER SYSTEMS, INC. TWO YEAR LIMITED WARRANTY FOR “GN” ENGINES Generac Power Systems, Inc. warrants to the original purchaser that the engine will be trouble free from defects in material or workmanship for the items and period set forth below from the date of original purchase. This warranty is not transferable. This warranty pertains to “GN” engines utilized to power equipment within the lawn and garden industry.
