Generac Power Systems OHVI GSH 220 Service Manual
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Generac Power Systems OHVI GSH 220 Service Manual

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  • Page 2 Foreword This manual has been written and published by GeNerAC ® Power SYSTeMS, INC. to aid our dealers’ mechanics, company service person- nel and general consumers when servicing the products described herein. It is assumed that these personnel are familiar with the servicing procedures for these products, or like or similar products, manufac- tured and marketed by GeNerAC ®...

  • Page 3: Table Of Contents

    Generac parts and are listed as such in this manual. ATTeNTIoN! Generac Power Systems does not approve or authorize the use of these engines on All Terrain vehicles (ATv’s), go-carts, motorbikes, aircraft products, personal watercraft, or vehicles intended for use in competitive events.

  • Page 4: Rules For Safe Operation

    ruleS For SAFe oPerATIoN ruleS For SAFe oPerATIoN If you do not understand any portion of this manual, con- tact Generac or your nearest Generac Authorized Service Study these RULES FOR SAFE OPERATION carefully before Dealer for starting, operating and servicing procedures. operating or servicing this equipment.

  • Page 5: Service Information

    Service inFOrMaTiOn use it for any application for which it was not designed. • Generac Power Systems does not approve or authorize the Service on this engine within and after the warranty use of these engines on All Terrain Vehicles (ATV’s), go-...

  • Page 6: 4-Cycle Engine Theory

    4-CYCle eNGINe THeorY If the engine is to run properly, four () events must occur in the proper sequence and at the correct time. These events are (A) intake, (B) compression, (C) ignition and power, and (D) exhaust. INTAke Power IGNITIoN ANd The piston is travelling from top dead center (TDC) to bottom By the time the piston reaches TDC , combustion is already in...

  • Page 7: Section 1: General Information

    SeCTIoN 1: GeNerAl INForMATIoN MAINTeNANCe SCHedule LUBRICATION: Oil has four purposes. It cools, cleans, seals and lubricates. Every Every Every Every During normal operation, small particles of metal from the 8 Hours or 25 Hours 50 Hours 100 Hours cylinder walls, pistons, bearings and combustion deposits will Daily Season Season...
  • Page 8 SeCTIoN 1: GeNerAl INForMATIoN Figure 1-1. Oil Fill Figure 1-3. Oil Filter Remove oil fill cap and refill slowly with new oil of proper REPLACE SPARK PLUGS: service classification and viscosity grade. Refill to bottom of Replace spark plugs every 00 hours of operation or every threads in oil fill opening.
  • Page 9 SeCTIoN 1: GeNerAl INForMATIoN crankcase and contaminate the oil, forming an abrasive mixture procedure is the same for all engine models, while any varia- which will cause wear on all of the internal moving parts. tion, by model, will be shown under the subject heading. The air cleaner on every engine brought in for a check up CHECK FUEL: or repair should be examined and serviced.
  • Page 10 SeCTIoN 1: GeNerAl INForMATIoN CYLINDER LEAK DOWN TEST PROCEDURE: one cylinder, not both. 5. Valves . Piston must be at TDC. 6. Rings 2. Install the tester into the spark plug hole 7. Piston . Pressurize the cylinder to 90 psi. 8.

  • Page 11: Section 2: Ignition

    SeCTIoN 2: IGNITIoN GeNerAl SPArk PluG The ignition system typically used on single cylinder engines The spark plug should be cleaned and regapped periodically. is a solid-state (breakerless) type. The system utilizes a magnet The plug should be replaced every 00 hours of operation or on the engine flywheel to induce a relatively low voltage into once annually, whichever comes first.
  • Page 12 SeCTIoN 2: IGNITIoN FLYWHEEL INSTALLATION: Align the keyway in the flywheel with the woodruff key on the crankshaft. Install the flywheel, the starter cup and the conical washer. Install the flywheel nut and tighten to the proper torque. NOTE: The conical washer must be installed in the proper direction (see Figure 2-4) with the convex side facing out (away from the flywheel).

  • Page 13: Section 3: Air Intake System And Carburetion

    SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN AIr CleANer . Remove the paper filter. . Clean the paper filter by tapping gently on a flat surface. SERVICING: If it is very dirty, replace it. The engine will not run properly and may be damaged if it 5.
  • Page 14 SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN AIR CLEANER BOX REMOVAL (SMALL FRAME): CArbureTIoN If the air cleaner box must be removed for further engine GENERAL: disassembly, follow Steps - from Large Frame Air Cleaner Proper engine performance depends on the carburetion Box Removal.

  • Page 15: Carburetor Adjustment

    SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN . Rotate the THROTTLE PLATE to it's closed position and NOTE: On small frame engines a MAIN JET TUBE is pressed into the carburetor body to a measured depth. Do NOT remove two THROTTLE PLATE SCREWS. attempt to remove this tube.
  • Page 16 SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN Figure 3-5. Exploded View of Typical Carburetor (Small Frame Engine) ITeM deSCrIPTIoN ITeM deSCrIPTIoN Carburetor Body Throttle Shaft Felt Washer Float Throttle Shaft Spring Float Bowl Screw Bowl Nut (Main Jet) Throttle Valve Fiber Washer Throttle Shaft Bowl Gasket...
  • Page 17 SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN Figure 3-6. Exploded View of Typical Carburetor (Large Frame Engine) ITeM deSCrIPTIoN ITeM deSCrIPTIoN Carburetor Body Choke Shaft Seal Float Choke Shaft Float Bowl Choke Plate Bowl Nut Choke Plate Screw Fiber Washer Throttle Shaft Bowl Gasket Throttle Shaft Seal...
  • Page 18 SeCTIoN 3: AIr INTAke SYSTeM ANd CArbureTIoN FINAL ADJUSTMENT: a. If the driven unit is an AC generator and an AC frequency meter is used, the correct high no-load speed is between The following instructions apply to engines NOT equipped 62-6 Hertz.

  • Page 19: Section 4: Mechanical Governor

    SeCTIoN 4: MeCHANICAl GoverNor GoverNor oPerATIoN GOVERNOR . The GOVERNOR SPRING tends to pull the LEVER and GOV- THRUST GEAR SHAFT WASHER ERNOR ROD toward the "INCREASE RPM" direction. GOVERNOR GEAR ASSEMBLY 2. As engine speed increases, centripetal force acts on the FLYWEIGHT.
  • Page 20 SeCTIoN 4: MeCHANICAl GoverNor WITH AUTOMATIC IDLE CONTROL: . Reattach the GOVERNOR ROD and ANTI-LASH SPRING to the GOVERNOR LEVER. Models equipped with automatic idle control (Section 5) have the same external governor parts as shown in Figure 2. Slide the GOVERNOR LEVER onto the GOVERNOR ARM. - with the addition of an idle control solenoid as shown in .

  • Page 21: Governor Adjustment

    SeCTIoN 4: MeCHANICAl GoverNor . All Generac carburetors have fixed main jets. Carburetors built prior to 997 may have been equipped with adjustable CRANKCASE COVER jets. If so equipped, turn the MAIN JET in (clockwise) until it just bottoms. DO NOT FORCE. Then, back the MAIN JET (see Figure 4-6) out (counterclockwise) about -/2 turns SHAFT...
  • Page 22 NoTeS highest rpm under load (see Figure -6). DO NOT EXCEED SPECIFICATION. b. CARBURETOR WITH ADJUSTABLE MAIN JET: Adjust the carburetor as follows: () Slowly turn the MAIN JET counterclockwise ( richer) until rpm or frequency starts to drop off. (2) Turn the MAIN JET clockwise (leaner) until rpm or frequency again starts to decrease.

  • Page 23: Section 5: Optional Idle Control

    SeCTIoN 5: oPTIoNAl Idle CoNTrol GeNerAl CIrCuIT oPerATIoN Some applications, such as AC generators, may be equipped . With Idle Control switch set to ON: with an automatic idle control system. This type of system pro- a. AC power is delivered from the generator’s AC power vides greatly improved fuel economy by running the engine at a windings to a circuit board, for operation of the circuit high governed speed only when electrical loads are connected...
  • Page 24 SeCTIoN 5: oPTIoNAl Idle CoNTrol Idle CoNTrol AdjuSTMeNT FINAL ADJUSTMENT: On the carburetor, turn the idle speed stop screw clockwise GENERAL: (faster speed) until engine speed increases to 2,280-2,00 rpm Idle speed will be correct when (a) the idle control solenoid is (8-0 Hertz) (see Figure 5-).

  • Page 25: Section 6: Cylinder Head And Valves

    SeCTIoN 6: CYlINder HeAd ANd vAlveS MAjor CoMPoNeNTS dISASSeMblY Valve train components are shown in Figure 6- below. . Remove the oil breather tube. Remove the four M6-.00 x 2mm screws. Then, remove the rocker arm cover (see Figure 6-2). NOTE: Whenever the rocker arm cover is removed, the cover gasket must be replaced to ensure a proper seal.
  • Page 26 SeCTIoN 6: CYlINder HeAd ANd vAlveS NOTE: Replace the cylinder head gasket every time the NOTE: Proper lapping of valves and seats will remove cylinder head is removed. The new head gasket must be grinding marks and ensure a good seal between the free of nicks and scratches as these could cause leaks.
  • Page 27 SeCTIoN 6: CYlINder HeAd ANd vAlveS vAlve ServICe (CoNTINued) INSTAllATIoN After the valve train components have been properly VALVE GUIDES: inspected and serviced, install the components as follows: Valve guides are permanently installed in the cylinder head . Install the intake and exhaust valves through the proper and cannot be replaced (see Figure 6-9).
  • Page 28 SeCTIoN 6: CYlINder HeAd ANd vAlveS INTAKE VALVE EXHAUST VALVE Figure 6-12. Intake and Exhaust Valves Figure 6-15. Install Push Rods AdjuSTING vAlve CleArANCe Adjust valve clearance with the engine at room temperature. The piston should be at top dead center (TDC) of its compres- sion stroke (both valves closed).

  • Page 29: Install Rocker Arm Cover

    SeCTIoN 6: CYlINder HeAd ANd vAlveS ROCKER ALLEN COVER WRENCH GASKET SCREW ROCKER COVER Figure 6-17. Tightening Rocker Arm Jam Nut Figure 6-18. Install Rocker Cover INSTAll roCker ArM Cover . Using a new rocker arm cover gasket, install the rocker arm cover and retain with four screws (see Figure 6-8).
  • Page 30 NoTeS...

  • Page 31: Section 7: Rewind Starters

    SeCTIoN 7: rewINd STArTerS GeNerAl REMOVE The rewind starter used on most GN/GSH series engines is BOLTS a manual starter that uses a spring to rewind the starter rope after it has been pulled. Pulling the rope winds up a clock-type spiral spring in the starter housing.
  • Page 32 SeCTIoN 7: rewINd STArTerS dISASSeMblY (old STYle) into the HOUSING. Install SPRING, STARTER DOGS and DOG SPRINGS. . Pry up the HANDLE INSERT, to expose knot in ROPE (see Figure 7-2). . Install retainer PAWL and SCREW. 2. Untie knot in ROPE. Remove HANDLE INSERT and .
  • Page 33 SeCTIoN 8: eleCTrIC STArTer INTroduCTIoN STARTER MOTOR REMOVAL: Some GN/GSH series engine applications may be equipped Note: Before removing starter, disconnect the negative with a 2 Volt DC electric cranking system. Such a system con- battery cable from the battery. verts electrical energy from a battery into mechanical energy To remove the starter from the engine, loosen and disconnect at the starter motor, for the purpose of turning the engine...
  • Page 34 SeCTIoN 8: eleCTrIC STArTer TeSTING A bATTerY STArTer MoTor PerForMANCe SPeCIFICATIoNS AT 12 volTS dC (reMovAble veNT CAP bATTerIeS oNlY) MINIMuM MoTor rPM = 800 . Visually inspect the battery case for cracks and other MAXIMuM AMPS = 9 defects. If damaged, replace the battery. If the starter does not perform satisfactorily, it should be 2.

  • Page 35: Section 9: Lubrication System

    SeCTIoN 9: lubrICATIoN SYSTeM GeNerAl (a) reduce friction The engine lubrication system serves to between moving parts, (b) cool the engine and (c) establish a negative pressure in the crankcase to prevent oil seal leakage. Major components include the following: •...

  • Page 36: Oil Pump

    SeCTIoN 9: lubrICATIoN SYSTeM INSPECTION: Remove the o-ring seals, then clean the pickup in solvent. Inspect the plastic body for cracks or other damage. Check the Make sure the hollow pickup screen for damage or clogging. tube is free of obstructions. Install the two o-ring seals prior to reassembly.

  • Page 37: Pressure Relief Valve

    SeCTIoN 9: lubrICATIoN SYSTeM PreSSure relIeF vAlve OIL PUMP DESCRIPTION: OUTER ROTOR A ball type pressure relief valve is located in a bore of the crankcase cover (see Figure 9-7). The valve serves to limit oil pressure to a maximum value. The ball will remain against its seat as long as oil pressure is below about 0 psi (on Large OIL PUMP Frame engines) or 0 psi (on Small Frame engines).

  • Page 38: Crankcase Cover

    SeCTIoN 9: lubrICATIoN SYSTeM CrANkSHAFT oIl SeAlS NOTE: The crankcase breather on vertical shaft GN/GSH/ GSV series engines is mounted on the crankcase assem- DESCRIPTION: bly and is configured differently. See "SERVICE MANUAL. COMPUTER CONTROLLED VARIABLE SPEED RV GENERA- An oil seal is provided in the crankcase cover and in the TORS,”...
  • Page 39 SeCTIoN 9: lubrICATIoN SYSTeM when working with compressed air, be sure to . Make sure the timing marks on the crankshaft, cam- wear appropriate eye protection to avoid personal shaft and balancer gears are properly aligned. Refer to injury. Figure -. .
  • Page 40 SeCTIoN 9: lubrICATIoN SYSTeM . Install the oil pump outer rotor onto the two drive pins CRANKCASE COVER INSTALLATION (SMALL FRAME ENGINE): at the of the camshaft (see Figure 9-2). Install the crankcase cover as follows: 2. Carefully install the crankcase cover. Align the cover with .
  • Page 41 SeCTIoN 9: lubrICATIoN SYSTeM CRANKCASE COVER BOLTS OIL PUMP INNER ROTOR CRANKCASE GASKET OIL PICKUP ASSEMBLY OIL PUMP OUTER ROTOR Figure 9-16. Crankcase Cover Bolt Tightening Sequence Figure 9-14. Reassembly of Crankcase Cover and Oil Pump . After tightening the crankcase cover bolts, make sure the crankshaft turns freely.
  • Page 42 SeCTIoN 9: lubrICATIoN SYSTeM low oIl PreSSure SYSTeM Some engine applications may be equipped with a low oil pressure switch (see Figure 9-9). The switch is a normally closed LOW OIL SWITCH type, but is held open by engine oil pressure during cranking and running.

  • Page 43: Section 10: Housing And Shrouds

    SeCTIoN 10: HouSING ANd SHroudS GeNerAl . Remove the capscrew from the lower shroud (see Figure 0-). In the course of tearing down a complete engine for service and repairs, the engine shrouds and housing will need to be 5. Remove the two capscrews from the upper shroud (see removed.
  • Page 44 NoTeS...

  • Page 45: Section 11: Crankshaft, Camshaft And Balancer 1

    SeCTIoN 11: CrANkSHAFT & CAMSHAFT CrANkCASe Cover reMovAl Note: Some models may be equipped with a camshaft spring washer. Before attempting to remove the crankcase cover, remove all rust, burrs and paint from the power take-off (PTO) end of . Remove the balancer (large frame engine only). the crankshaft.
  • Page 46 SeCTIoN 11: CrANkSHAFT & CAMSHAFT . Inspect the crankpin for nicks, scratches or other damage. Small scratches and nicks can be polished out using fine emery cloth. ALL EMERY CLOTH RESIDUE MUST BE COMPLETELY REMOVED USING A SOLVENT (SUCH AS KEROSENE).

  • Page 47: Compression Release

    SeCTIoN 11: CrANkSHAFT & CAMSHAFT 2. Inspect the crankshaft bearing bore in the crankcase cover for damage and wear (Figure -7). a. Measure the Inside diameter of the bearing bore. b. If the bore is worn excessively, replace the crankcase cover.
  • Page 48 SeCTIoN 11: CrANkSHAFT & CAMSHAFT After installing the crankshaft, the piston and connecting rod can be installed. (See Section 2) TIMING MARK bAlANCer INSTAllATIoN (lArGe FrAMe eNGINeS) Apply oil to balancer bearing surfaces and to bearing bore surfaces. Install the balancer into the balancer bearing bore of the crankcase.
  • Page 49 SeCTIoN 12: PISToN, rINGS & CoNNeCTING rod INSPeCTIoN & ASSeMblY GeNerAl REMOVAL FROM CONNECTING ROD: There are no oversize pistons or rings available for these An oil hole in the wrist pin area of the piston helps distribute engines. For that reason, if the cylinder is damaged or worn oil to aid in cooling.
  • Page 50 SeCTIoN 12: PISToN, rINGS & CoNNeCTING rod INSPeCTIoN & ASSeMblY NOTE: Tolerances between the wrist pin and wrist pin DESCRIPTION: bores are extremely close. Always apply engine oil to A piston ring set consists of (a) a top compression ring, (b) a the pin and its bores prior to installation.
  • Page 51 SeCTIoN 12: PISToN, rINGS & CoNNeCTING rod INSPeCTIoN & ASSeMblY e. Slide the wrist pin through the piston bore opposite the side with the snap ring (installed in Step 2c), then through the rod and the second piston bore until it contacts the snap ring.
  • Page 52 NoTeS 0. Install the connecting rod cap with its match mark aligned with identical mark on rod. . Install the connecting rod cap bolts and tighten to the proper torque. CYlINder ServICe INSPECTION: . Inspect cylinder for dirty, broken or cracked cooling fins. 2.

  • Page 53: Section 13: Troubleshooting 1

    SeCTIoN 13: TroubleSHooTING ProbleM SolvING CHECK IGNITION SYSTEM: See "Testing the Ignition System" in Section 8. INTRODUCTION: Problems that affect engine operation may be classified as CHECK COMPRESSION: one of, or a combination of two or more of the following: To check engine compression, remove the spark plug.
  • Page 54 SeCTIoN 13: TroubleSHooTING ProbleM PoSSIble CAuSeS reMedY 1. engine will not start or starts a. Fuel tank is empty. a. Fill fuel tank. with difficulty. b. Low oil level. b. Replenish oil as necessary. c. Dirty air cleaner. c. Clean or replace air cleaner element.
  • Page 55 SeCTIoN 13: TroubleSHooTING ProbleM PoSSIble CAuSeS reMedY 7. engine surges or . Vent hole in fuel tank cap plugged. . Open vent hole in tank cap. runs unevenly 2. Governor parts sticking or binding. 2. Clean governor parts and replace as necessary.
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  • Page 57: Section 14: Specifications - Small Frame Engines 1

    SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS GeNerAl SPeCIFICATIoNS Model GN-190 GN-191 GN/GSH-220 BORE 2.76 inches (70mm) 2.76 inches (70mm) 2.95 inches (75mm) STROKE .9 inches (9mm) .9 inches (9mm) .9 inches (9mm) DISPLACEMENT 88.6cc 88.6cc 26.5cc OIL CAPACITY 2 ounces (700 ml) 2 ounces (700 ml) 2 ounces (700 ml) WITH OIL FILTER CHANGE...
  • Page 58 SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS CrANkCASe ASSeMblY Model GN-190 GN-191 GN/GSH-220 2.756-2.757 INCH 2.756-2.757 INCH 2.95-2.95 INCH CYLINDER BORE DIAMETER (70.000-70.025MM) (70.000-70.025MM) (75.000-75.025MM) 0.295-0.296 INCH 0.295-0.296 INCH 0.295-0.296 INCH VALVE TAPPET BORE DIAMETER (7.9-7.520MM) (7.9-7.520MM) (7.9-7.520MM) CRANKSHAFT SLEEVE BEARING .0-.06 INCH .0-.06 INCH .0-.06 INCH...
  • Page 59 SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS CoNNeCTING rod ASSeMblY Model GN-190 GN-191 GN/GSH-220 LARGE END INSIDE .8-.8 inch .8-.8 inch .8-.8 inch DIAMETER: (0.06-0.07mm) (0.06-0.07mm) (0.06-0.07mm) SMALL END INSIDE 2.96-2.2 inch 2.96-2.2 inch 2.96-2.2 inch DIAMETER: (55.8-56.2mm) (55.8-56.2mm) (55.8-56.2mm) .02-.0 inch .02-.0 inch .02-.0 inch...
  • Page 60 SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS CAMSHAFT ASSeMblY Model GN-190 GN-191 GN/GSH-220 MAIN CAMSHAFT BEARING .022-.02 inch .022-.02 inch .022-.02 inch DIAMETER (FLYWHEEL END): (25.96-25.98mm) (25.96-25.98mm) (25.96-25.98mm) MAIN CAMSHAFT BEARING .022-.02 inch .297-.298 inch .297-.298 inch DIAMETER (PTO END): (25.96-25.98mm) (2.96-2.98mm) (2.96-2.98mm)
  • Page 61 SeCTIoN 14: SPeCIFICATIoNS - SMAll FrAMe eNGINeS Torque SPeCIFICATIoNS Model GN-190 GN-191 GN/GSH-220 5. Nm 5. Nm 5. Nm ROCKER COVER SCREWS (8 in-lbs) (8 in-lbs) (8 in-lbs) 8. Nm 8. Nm 8. Nm ROCKER ARM JAM NUT (72 in-lbs) (72 in-lbs) (72 in-lbs) 29.8 Nm...
  • Page 62 NoTeS 14-6...

  • Page 63: Section 15: Specifications - Large Frame Engines 1

    SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS GeNerAl SPeCIFICATIoNS Model GN-320 GN-360 GN/GSH-410 BORE .5 inches (80mm) .5 inches (85mm) .5 inches (90mm) STROKE 2.52 inches (6mm) 2.52 inches ( 6mm) 2.52 inches ( 6mm) DISPLACEMENT 22cc 6cc 07cc OIL CAPACITY 7 ounces (.0 L) 7 ounces (.0 L) 7 ounces (.0 L)
  • Page 64 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS CrANkCASe ASSeMblY Model GN-320 GN-360 GN/GSH-410 .50-.5 inch .6-.7 inch .5-.5 inch CYLINDER BORE DIAMETER (80.000-80.025 mm) (85.000-85.025 mm) (90.000-90.025 mm) VALVE TAPPET BORE 0.5-0.55 inch 0.5-0.55 inch 0.5-0.55 inch DIAMETER (8.99-9.020 mm) (8.99-9.020 mm) (8.99-9.020 mm) CRANKSHAFT SLEEVE...
  • Page 65 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS CoNNeCTING rod ASSeMblY Model GN-320 GN-360 GN/GSH-410 LARGE END INSIDE .9-.20 inch .9-.20 inch .9-.20 inch DIAMETER (6.06-6.07 mm) (6.06-6.07 mm) (6.06-6.07 mm) SMALL END INSIDE 0.788-0.789 inch 0.788-0.789 inch 0.788-0.789 inch DIAMETER (20.02-20.0 mm) (20.02-20.0 mm) (20.02-20.0 mm)
  • Page 66 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS ASSeMblY CAMSHAFT Model GN-320 GN-360 GN/GSH-410 MAIN CAMSHAFT BEARING .08-.082 inch .08-.082 inch .08-.082 inch DIAMETER (FLYWHEEL END) (27.6-27.8 mm) (27.6-27.8 mm) (27.6-27.8 mm) MAIN CAMSHAFT BEARING .297-.298 inch .297-.298 inch .297-.298 inch DIAMETER (PTO END) (2.96-2.98 mm) (2.96-2.98 mm)
  • Page 67 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS Torque SPeCIFICATIoNS Model GN-320 GN-360 GN/GSH-410 5. Nm 5. Nm 5. Nm ROCKER COVER SCREWS (8 in-lbs) (8 in-lbs) (8 in-lbs) 9.6 Nm 9.6 Nm 9.6 Nm ROCKER ARM JAM NUT (7 in-lbs) (7 in-lbs) (7 in-lbs) 59.6 Nm...
  • Page 68 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS 15-6...
  • Page 69 SeCTIoN 15: SPeCIFICATIoNS - lArGe FrAMe eNGINeS 1 5 15-7...
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  • Page 72 Generac Power SyStemS, Inc. ® P. O. BOx 310 EaglE, WI 53119 Printed in USa Part no. 0c1103a revision a (06/20/06)

This manual is also suitable for:

Ohvi gsh 190Ohvi gsh 320Ohvi gsh 410Ohvi gsv 190Ohvi gsv 220

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