Generac Power Systems GTH - 990 Owner's Manual

Generac Power Systems GTH - 990 Owner's Manual

33 hp

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Owner's Manual
GTH - 990, 33 HP
www.generac.com
SAVE this Manual. Provide this manual
to any operator of the engine.

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Summary of Contents for Generac Power Systems GTH - 990

  • Page 1 Owner’s Manual GTH - 990, 33 HP SAVE this Manual. Provide this manual to any operator of the engine. www.generac.com...
  • Page 2: Table Of Contents

    Table of Contents Introduction ............. 1 Maintenance ............5 Read This Manual Thoroughly ..........1 General Maintenance Recommendations ........5 Rules for Safe Operation ............1 Perfoming Scheduled Maintenance ........5 Before Operating..............1 Checking the Oil Level ............5 While Operating ..............2 Changing the Oil and Oil Filter ..........5 Service Information ..............2 Cleaning Intake Screen and Cooling Fins ........6 Servicing the Air Cleaner ............6...
  • Page 3: Introduction

    Safety Rules INTRODUCTION RULES FOR SAFE OPERATION Study these RULES FOR SAFE OPERATION carefully before READ THIS MANUAL THOROUGHLY operating or servicing this equipment. Become familiar with the OWNER’S MANUAL and with the engine. The engine can operate If any portion of this manual is not understood, contact the nearest safely, efficiently and reliably only if it is properly operated and Dealer for starting, operating and servicing procedures.
  • Page 4: While Operating

    Safety Rules WHILE OPERATING SERVICE INFORMATION • This engine was designed and manufactured for specific appli- Service on this engine within and after the cations. Do not attempt to modify the equipment or use it for any application for which it was not designed. warranty period can be performed by any •...
  • Page 5: General Information

    General Information OIL AND FUEL INFORMATION Thereafter, change oil and filter every 100 hours of operation. Change oil more often if engine is operated in dirty or dusty condi- NOTE: tions or if engine is operated under heavy loads or in high ambient Be sure to read these instructions carefully before attempting air temperatures.
  • Page 6: Recommended Battery

    General Information RECOMMENDED BATTERY BEFORE STARTING THE ENGINE Servicing of the battery is to be performed or supervised by per- Perform the following tasks before trying to start the engine: sonnel knowledgeable of batteries and the required precautions. Keep unauthorized personal away from batteries. Checking and Adding Engine Oil Use only 12 volt negative (-) ground batteries with a minimum rat- NOTE:...
  • Page 7: Operation

    Operation STARTING THE ENGINE Figure 4 — Winter/Summer Valve Open the fuel shut-off valve, (if equipped). Move choke control to Choke or Start position. Push throttle to Fast position (if equipped). Operate the engine with the throttle in Fast position. Turn key to Start position (hold until engine starts, but not more than 5 seconds).
  • Page 8: Cleaning Intake Screen And Cooling Fins

    Maintenance When changing the oil filter, use the following instructions: Figure 7 — Clean Intake Screen & Oil Cooler Fins A. Locate filter (Figure 6). B. Place a suitable container beneath the oil filter and turn the filter counterclockwise to remove the filter. C.
  • Page 9: Replacing The Spark Plug

    Maintenance Figure 8 — Air Cleaner Figure 10 — Spark Plug Gap CLEANING SPARK ARRESTOR SCREEN If 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. NOTE: If using the engine on any forest-covered, brush-covered or grass-covered unimproved land, it must have a spark arrestor.
  • Page 10: Carburetor Adjustments

    Maintenance CARBURETOR ADJUSTMENTS NOTE: The rocker arm jam nut must be held in place as the pivot ball The carburetor of the engine is pre-set at the factory. The carbure- stud is turned. tor should not be tampered with because it would violate EPA and CARB regulations and VOID THE EMISSION CONTROL SYSTEM When valve clearance is correct, hold the pivot ball stud in WARRANTY.
  • Page 11: Storage Instructions

    Maintenance STORAGE INSTRUCTIONS MAINTENANCE SCHEDULE This engine should be started at least once a month and run for at least 10 minutes. If this cannot be done and the equipment must Every Every be stored for more than 30 days, use the following guidelines to Every 8 Every 50 prepare it for storage.
  • Page 12: Product Specifications

    Troubleshooting PRODUCT SPECIFICATIONS SERVICE PARTS Model GTH 990 Part Number Bore 90mm Spark Plug 0E6037A Stroke 78mm Oil Filter 070185H Valve Clearance 0.05 - 0.10mm Air Cleaner Element 0D9723 (.002 - .004 in.) Air Pre-cleaner 0D4511 Displacement 992cc Air Filter, Primary (Canister Style, large) 0E3557 Maximum Tilt Angle While Operating 15°...
  • Page 13: Notes

    Notes...
  • Page 14: Warranty

    YOUR WARRANTY RIGHTS AND OBLIGATIONS The United States Environmental Protection Agency (EPA) and Generac Power Systems, Inc. (Generac) are pleased to explain the Exhaust Emission Control System Warranty (ECS Warranty) on your new 2011 and later equipment. New equipment that use small spark-ignited engines must be designed, built, and equipped to meet stringent anti-smog standards for the federal government.
  • Page 15: Emission Control System Warranty

    Warranty EMISSION CONTROL SYSTEM WARRANTY Exhaust Emission Control System Warranty (ECS Warranty) for equipment using small spark-ignited engines: Applicability: This warranty shall apply to equipment that uses small off-road engines. The ECS Warranty period shall begin on the date the new equipment is purchased by/delivered to its original, end-use purchaser/owner and shall continue for the lesser of: (1) The period of time specified in the product Warranty enclosed herewith, but not less than 24 months, or (2) For engines equipped with hour meters, a number of operating hours equal to half of the engine’s useful life.
  • Page 16 GENERAC POWER SYSTEMS’ TWO-YEAR LIMITED WARRANTY FOR GTH SERIES ENGINES For a period of 2 (two) years of operation from the date of original sale, Generac Power Systems, Inc. (Generac) will, at its option, repair or replace any part which, upon examination, inspection and testing by Generac or a Generac Authorized Warranty Service Dealer, is found to be defective under normal use and service, in accordance with the warranty schedule set forth below.

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