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Manual No. A8927
®
GENERAC ENGINES
Overhead Valve
Industrial
Owner’s Manual
Model No. GN - 320/360/410 (11/13/15 Horsepower)
T TH HIIS S S SY YM MB BO OL L P PO OIIN NT TS S O OU UT T IIM MP PO OR RT TA AN NT T S SA AF FE ET TY Y IIN NS ST TR RU UC CT TIIO ON NS S,, W WH HIIC CH H,, IIF F N NO OT T F FO OL LL LO OW WE ED D,, C CO OU UL LD D E EN ND DA AN NG GE ER R
T TH HE E P PE ER RS SO ON NA AL L S SA AF FE ET TY Y A AN ND D//O OR R P PR RO OP PE ER RT TY Y O OF F Y YO OU UR RS
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e RULES FOR SAFE OPERATION If you don’t understand any portion of this manual, contact Study these RULES FOR SAFE OPERATION carefully before Generac for a demonstration of actual starting, operating and operating or servicing this equipment. Become familiar with the servicing procedures. OWNER’S MANUAL and with the engine. The engine can Throughout this publication and on tags and decals affixed to operate safely,
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e • Do not overfill the fuel tank. Always allow room for fuel • Do not insert any object through the cooling slots of the expansion. If the tank is overfilled, the fuel can overflow onto engine. You could damage the equipment or injure yourself. a hot engine and cause a FIRE or an EXPLOSION. • Do not operate the engine faster than the speed necessary to • Allow at least two (2) feet of clearance on all sides of the
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e This engine meets the 1998 and later California emissions TABLE OF CONTENTS regulations. To ensure that your engine continues to meet these regulations, refer to the following information and RULES FOR SAFE OPERATION..........................................2-3 instructions in this owner’s manual. GENERAL INFORMATION....................................................4-5 Service Information ......................
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G Ge en ne er ra ac c G GN N- - 3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e The recommended oils include the following: OIL AND FUEL INFORMATION • During summer months: SAE 10W-30, NOTE: BE SURE TO READ THESE INSTRUCTIONS • During winter months: SAE 5W-20 or 5W-30. DO NOT USE CAREFULLY BEFORE ATTEMPTING TO START OR SAE 10W-40. OPERATE THIS EQUIPMENT. Using old or improper oil or The crankcase oil capacity is about 1500 ml (51 oz.) with the oil fuel can cause engine damage. filter. W
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e OPERATION AND MAINTENANCE STARTING THE ENGINE It is the owner’s/operator's responsibility to perform all safety 1. Open the fuel shut-off valve, if so equipped. checks; to make sure that all maintenance for safe operation is 2. If your unit is equipped with the IDLE/CONTROL feature, performed promptly; and to have the engine checked by an locate the IDLE/CONTROL ON/OFF SWITCH on the control authorized dealer perio
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G Ge en ne er ra ac c G GN N- -1 19 90 0//2 20 00 0 E En ng giin ne e A If the engine FAILS TO START, go to Step 3. STOPPING THE ENGINE B. If the engine STARTS, go to Step 4. 1. Remove the load on the engine, and let it run for 30 Figure 4 — Recoil Handle 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. LOW PRESSURE SHUTDOWN SYSTEM The engine is equipped with a low oil pressure sensor that shuts down the engi
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e 2. When the oil is drained, install and tighten the oil drain GENERAL MAINTENANCE plug. RECOMMENDATIONS 3. If your engine is equipped with an oil filter, use the following instructions: The owner/operator is responsible for making sure that all periodic maintenance tasks are completed on a timely basis; that all A. Place a suitable container beneath the oil filter and discrepancies are corrected; and that the e
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e CAUTION: Never run this equipment without the complete 3. To clean or replace the foam pre-filter: air cleaner system installed on the engine. This could result A. Wash the pre-filter in soapy water. in premature wear to the engine. B. Squeeze the pre-filter dry with a clean cloth. DO NOT TWIST. Use the following instructions to clean or replace the air cleaner components. NOTE: If the pre-filter is still dirty a
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Generac GN-320/360/410 Engine 3. Set the spark plug gap (Figure 8) to 0.76mm (0.030 in.). Figure 9 — Removing Heat Shield Install a correctly gapped spark plug into the cylinder head. 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. Heat Shield NOTE: If you
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e 3. Loosen the rocker arm jam nut. Using an allen wrench to turn CARBURETOR ADJUSTMENTS the pivot ball stud, check the clearance between the rocker arm and the valve stem with a flat feeler gauge (Figure 11). The carburetor of your engine is pre-set at the factory. The carburetor should not be tampered with because this will VOID Figure 11 — Adjusting Valve to Rocker Arm Clearance THE EMISSION CONTROL SYSTEM WARRA
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e RETORQUING THE HEAD BOLTS Figure 12 — Tightening Sequence After the first 50 hours of operation, retorque the head bolts. D NOTE: Only perform this adjustment after the first 50 hours of B operation. The head bolts will need no further adjustment. 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).
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e OTHER STORAGE TIPS STORAGE INSTRUCTIONS 1. Do not store gasoline from one season to another. This engine should be started at least once a week and run for at 2. Replace the gasoline can if it starts to rust. Rust and/or dirt least 30 minutes. If this cannot be done and the equipment must be stored for more than 30 days, use the following guidelines to in a gasoline can cause problems when you use that fuel with t
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Generac GN-320/360/410 Engine E EX XP PL LO OD DE ED D V VIIE EW W — — L LO ON NG G B BL LO OC CK K ( (G GN N- -3 32 20 0//3 36 60 0//4 41 10 0) ) — 14 — 3C 4C 21A 10C 21B
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e R RE EP PA AIIR R P PA AR RT TS S L LIIS ST T — — L LO ON NG G B BL LO OC CK K ( (G GN N- -3 32 20 0//3 36 60 0//4 41 10 0) ) ITEM PART NO. QTY. DESCRIPTION ITEM PART NO. QTY. DESCRIPTION 1 71978 1 Connecting Rod With Cap 29 86025 1 Gerotor Set and Bolt 30 84430 1 Balancer 2 71980 1 Piston Pin 31 21714 1 Cylinder Head With Valve 3A 89291 1 Piston Ring Set 80 MM (320) Seats & Guides 3B 71977 1 Piston Ring S
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e E EX XP PL LO OD DE ED D V VIIE EW W — — A AIIR R C CL LE EA AN NE ER R A AN ND D C CA AR RB BU UR RE ET TO OR R 43A 43B 43C — 16 —
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e A AIIR R C CL LE EA AN NE ER R A AN ND D C CA AR RB BU UR RE ET TO OR R ITEMDESCRIPTION PART NO. QTY. ITEMDESCRIPTION PART NO. QTY. 31 Breather Hose 72745 1 44 Air Cleaner Base 73108A 1 32 Manifold Head Gasket 91039 1 45 M6 Flatwasher 49811 4 33 M6 x 20 SHCS 40945 2 46 #8 x 3/8" Plastite 59635 1 34 Carburetor Bolt 81647 2 Screw 35 M6 x 12 HHCS 66476 2 47 Air Filter 73111 1 36 K Adapter 91028 1 48 Precleaner 816
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e E EX XP PL LO OD DE ED D V VIIE EW W — — G GA AS S T TA AN NK K M MO OU UN NT TIIN NG G H HA AR RD DW WA AR RE E ITEM PART # QTY. DESCRIPTION 22 40976 2 SHCS M8-1.25 X 20 26 22129 2 Lock Washer M8 94 B2348 1 Tank Cradle 95 52858 2 M8 Lock Nut 96 59012 2 M8 X 20 FLHCS 97 96083 1 Front Tank Bracket 98 96084 1 Rear Tank Bracket 99 89263 1 Dipstick ASM 100 A6558 1 Oil Fill/Check Tube — 18 —
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e E EX XP PL LO OD DE ED D V VIIE EW W — — O OIIL L F FIIL LT TE ER R A AN ND D O OP PT TIIO ON NA AL L O OIIL L F FIIL LL L T TU UB BE E ITEM PART # QTY. DESCRIPTION 2 86999 1 Oil Filter Gasket 3A 72709 1 Oil Blockoff 3B 94683 1 Oil Filter Adapter 4 49821 2 M8 X 30 SHCS 5 99236 1 Oil Press Switch 6 70185 1 Oil Filter — 19 —
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G Ge en ne er ra ac c G GN N- -3 32 20 0//3 36 60 0//4 41 10 0 E En ng giin ne e E EX XP PL LO OD DE ED D V VIIE EW W — — L LO OW W O OIIL L S SH HU UT TD DO OW WN N A AN ND D G GO OV VE ER RN NO OR R ITEM PART # QTY. DESCRIPTION ITEM PART # QTY. DESCRIPTION 7 78653 1 Run/Stop Switch 21 72734 1 Governor Lever 23 83502 1 Adjust Screw 8 85272 1 LED Assembly 9 93104 1 L.O.S. Decal 24 83512 2 M8 X 15 Taptite 25 73100 1 60Hz Gov. Spring 10 93611 1 Black Sleeving 12 84329 1 3 Pin Male HSG 27 8
