Replace Spark Plugs; Air Cleaner Maintenance; Service Dual Element Air Cleaners; Service Canister Air Cleaners - Generac Power Systems GTV-990 Manual

Figure 1-4. Clean Intake Screen & Oil Cooler Fins

REPLACE SPARK PLUGS:

Replace spark plugs every 100 hours of operation or every
season, whichever occurs first. Replace spark plugs if elec-
trodes are burned away, or the porcelain is cracked. Set spark
plug gap at .76 mm (.030") for all models. Torque spark plugs
to 20.0 Nm (180 in. lbs.).
Figure 1-5. Setting Spark Plug Gap
GENERAC
Spark Plug Type Part No.
Resistor Plug 072347

AIR CLEANER MAINTENANCE:

WARNING: NEVER OPERATE ENGINE WITH AIR
CLEANER ASSEMBLY OR AIR CLEANER CARTRIDGE
REMOVED. FIRE MAY RESULT.
A properly serviced air cleaner protects internal parts of the
engine from dirt and dust particles in the air. If air cleaner instruc-
tions are not carefully followed, dirt and dust which should be
INTAKE
collected in the cleaner, will be drawn into the engine. These
SCREEN
particles are highly abrasive and will cause the piston rings and
cylinder bore to wear quickly. As the rings and cylinder bore
become worn, these abrasive particles enter the crankcase
OIL
and contaminate the oil, forming an abrasive mixture which
COOLER
will cause wear on all of the internal moving parts.
FINS
The air cleaner on every engine brought in for a check up
or repair should be examined and serviced. If the air cleaner
shows signs of neglect, show it to the customer before clean-
ing. Instruct the customer on proper care, to assure long
engine life.
Note: Replace air cleaner gaskets and mounting gaskets
that are worn or damaged, to prevent dirt and dust from
entering engine due to improper sealing. Replace bent
air cleaner mounting bracket if necessary.

SERVICE DUAL ELEMENT AIR CLEANERS:

Remove and service foam pre-cleaner every 25 hours or every
season, whichever occurs first. Service cartridge every 50 hours
or every season, whichever occurs first.

SERVICE CANISTER AIR CLEANERS:

Clean the air filter element(s) with compressed air every 50
hours or every season, whichever occurs first. Replace the air
filter element(s) every 500 hours or if damaged.
Note: The air cleaner assemblies on some equipment
may have been supplied by the equipment manufac-
turer. See the equipment manufacturer's owner's manual
for service information specific to that product.
Most complaints concerning engine operation can be clas-
sified as one or a combination of the following:
1. Will not start
2. Hard starting
3. Lack of power
4. Runs rough
C h a m p i o n
Part No.
5. Vibration
RC12YC
6. Overheating
7. High oil consumption
Note: What appears to be an engine malfunction may be
a fault of the powered equipment rather than the engine.
If equipment is suspect, see equipment affecting engine
operation.
1-3
SECTION 1: GENERAL INFORMATION

TROUBLESHOOTING