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WHILE OPERATING

•  This engine was designed and manufactured for specific appli-

cations. Do not attempt to modify the equipment or use it for 

any application for which it was not designed.

•  Engine exhaust gases contain 

DEADLY

 carbon monoxide gas. This 

dangerous gas, if breathed in sufficient concentrations, can cause 

unconsciousness or even death. Operate this equipment only in the 

open air where adequate ventilation is available.

•  Do not insert any object through the cooling slots of the engine. 

This could damage the equipment or injure personnel.

•  Do not operate the engine faster than the speed necessary to operate 

the equipment. Do not run the engine at high speed when not operat-

ing the equipment.

•  This engine requires an adequate flow of cooling air for its con-

tinued proper operation. Never operate the equipment inside any 

room or enclosure where the free flow of cooling air into and out 

of the equipment might be obstructed. Without sufficient cool-

ing air flow, the engine quickly overheats, damaging the engine 

or nearby property.

•  Do not smoke around the engine. Wipe up any fuel or oil spills 

immediately. Never leave oily or fuel soaked rags around the 

engine. Keep the area around the engine clean and free of 

debris.

•  Keep hands, feet, clothing, etc., away from moving parts of this 

engine.

• Never operate the engine (a) in the rain; (b) in any enclosed 

compartment; (c) if the engine speed changes; (d) if the engine 

sparks; (e) if flame or smoke is observed while the engine is 

running.

•  Never work on this engine or handle any electrical device while 

standing in water, while barefoot, or while hands or feet are wet.

 

DANGEROUS ELECTRIC SHOCK

 will result.

•  Allow muffler, engine cylinder and fins to cool before touching.
• Remove accumulated combustibles from muffler area and 

cylinder area.

• Install and maintain in working order a spark arrester before 

using equipment on forest covered, grass covered, brush 

covered unimproved land. The state of California requires this 

(Section 4442 of the California Public Resources Code). Other 

states may have similar laws. Federal laws apply on federal 

land.

CALIFORNIA PROPOSITION 65 WARNING

Engine exhaust and some of its constituents are known 

to the State of California to cause cancer, birth defects 

and other reproductive harm.

CALIFORNIA PROPOSITION 65 WARNING

This product contains or emits chemicals known to the 

State of California to cause cancer, birth defects and 

other reproductive harm.

Safety Rules



Running engines produce heat. Engine 

parts, especially muffler, become 

extremely hot. Severe thermal burns can 

occur on contact. Combustible debris, 

such as leaves, grass, brush, etc. can 

catch fire.

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.
When contacting an authorized service dealer 
about parts and service

, always supply the 

complete model number and serial number 

of 

the unit as given on its data plate decal. See the 
illustration below for the location of the decal.
The warranty for this engine is included in the 
owner’s manual.

Содержание GTH - 990

Страница 1: ...Owner s Manual GTH 990 33 HP www generac com SAVE this Manual Provide this manual to any operator of the engine...

Страница 2: ...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...

Страница 3: ...h the OWNER S MANUAL and with the engine The engine can operate safely efficiently and reliably only if it is properly operated and maintained Many accidents are caused by failing to follow simple and...

Страница 4: ...e is running Never work on this engine or handle any electrical device while standing in water while barefoot or while hands or feet are wet DANGEROUS ELECTRIC SHOCK will result Allow muffler engine c...

Страница 5: ...st eight 8 hours of operation Thereafter change oil and filter every 100 hours of operation Change oil more often if engine is operated in dirty or dusty condi tions or if engine is operated under hea...

Страница 6: ...ice Proper maintenance and care of the engine assures a minimum number of problems and keeps operating expenses at a minimum See an authorized dealer distributor for service aids and acces sories BEFO...

Страница 7: ...d or the crankcase breather system To eliminate this problem this engine may be fitted with a winter summer valve Figure 4 This directs hot air into the carburetor during cold weather operation Always...

Страница 8: ...ake Screen Oil Cooler Fins SERVICING THE AIR CLEANER The equipment s air cleaner system is one of the most important items to maintain The engine will not run properly and may be damaged if it is run...

Страница 9: ...st have a spark arrestor The spark arrestor must be maintained in good condition by the owner operator Clean and inspect the spark arrestor screen as follows Inspect the screen and replace if it is to...

Страница 10: ...The piston is at TDC when it is at its highest point of travel Loosen the rocker jam nut Figure 11 Use a 10mm allen wrench to turn the pivot ball stud while checking clearance between the rocker arm...

Страница 11: ...about five 5 minutes to warm it NOTE Alcohol blended fuel or gasohol attracts moisture which can lead to the separation and formation of acids during storage This acidic gas can damage internal engin...

Страница 12: ...ve stuck open or closed 11 Engine has lost compression 1 Clean or replace air cleaner 2 Fill fuel tank 3 Drain fuel tank and carburetor fill with fresh fuel 4 Connect wire to spark plug 5 Replace spar...

Страница 13: ...11 Notes...

Страница 14: ...r equipment but Generac cannot deny warranty solely due to the lack of receipts You should be aware that Generac may deny any and or all warranty coverage or responsibility if your equipment or a part...

Страница 15: ...replacement as required maintenance in the Owner s Manual shall be warranted for the period of time prior to first scheduled replacement point for that part If the part fails prior to the first schedu...

Страница 16: ...placement to perform well This warranty will not cover repair when normal use has exhausted the life of a part s or engine Failures caused by any external cause or act of God such as collision theft v...

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