Generac Power Systems GTH - 990, Owner'S Manual

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Introduction ............................................................. 1
Read This Manual Thoroughly ...............................................1
Rules for Safe Operation ........................................................1
Before
Operating....................................................................1
While Operating .....................................................................2
Service Information ....................................................................2
General Information ................................................ 3
Oil and Fuel Information ............................................................3
Recommended Oil Type ............................................................3
Change
Oil ............................................................................3
Recommended Fuel Type ..........................................................3
Engine Emission Compliance Period ......................................3
Recommended Battery ..............................................................4
Battery
Cables .......................................................................4
Operation and Maintenance .......................................................4
Before Starting the Engine .....................................................4
Operation ................................................................ 5
Starting the Engine ....................................................................5
Stopping the Engine ..................................................................5
Low Oil Pressure System ......................................................5
Winter/Summer Intake Air Control (If So Equipped) ....................5
Maintenance ........................................................... 5
General Maintenance Recommendations ...................................5
Perfoming Scheduled Maintenance ........................................5
Checking the Oil Level ...........................................................5
Changing the Oil and Oil Filter ................................................5
Cleaning Intake Screen and Cooling Fins ................................6
Servicing the Air Cleaner .......................................................6
Replacing
the Spark Plug ........................................................7
Cleaning Spark Arrestor Screen .............................................7
Service and Adjustments...........................................................7
Engine
Speed ........................................................................7
Carburetor Adjustments .........................................................8
Checking and Adjusting Valve Clearance ................................8
Maintenance Schedule ..............................................................8
Storage Instructions ..................................................................9
Other Storage Tips.................................................................9
Product Specifications ............................................................10
Oil Capacities ..........................................................................10
Service Parts ..........................................................................10
Troubleshooting .................................................... 10
Notes .................................................................... 11
Warranty ............................................................... 12
Table of Contents