Generac Power Systems 009600-5 - Manual (Page 15)

Section 3 – Maintenance
PRIMEPACT 66G and 66LP Recreational Vehicle Generators
filter must lock into slots on cover.
8. Install the cover, foam precleaner and paper filter.
9. Replace knob to retain the filter in place.
Figure 3.3 – Engine Air Cleaner
3.4 CLEAN AIR INTAKE SCREEN
Clean all foreign material from the air intake screen
(Figure 3.4) at least once every 100 hours of opera-
tion. Clean more often if necessary.
Inspect the area around the generator exhaust muf-
fler periodically and remove all grass, leaves, dirt,
etc., from this area.
Figure 3.4 – Cleaning Air Intake
3.5 CHECKING THE ENGINE
SPARK PLUG
Clean the spark plug and reset the spark plug gap
every 100 hours of operation.
1. Clean the area around the base of the spark plug
to keep dirt and debris out of the engine. Clean by
scraping or washing using a wire brush and com-
mercial solvent. Do not blast the spark plug to
clean.
2. Remove the spark plug and check the condition.
Replace the spark plug if worn or if reuse is ques-
tionable.
3. Check the spark plug gap using a wire feeler
gauge. Adjust the gap to 0.030 inch (0.76 mm)
by carefully bending the ground electrode
(Figure 3.5).
Figure 3.5 – Setting the Spark Plug Gap
Sparking can occur if the wire terminal does
not fit firmly on the spark plug terminal end. If
necessary, re-form the wire terminal to obtain a
tight fit.
3.6 FUEL FILTER
(GASOLINE ONLY)
Remove and replace the fuel filter (Figure 3.6)
once each year or every 100 hours of operation,
whichever comes first.
Figure 3.6 – Fuel Filter
3.7 SPARK ARRESTOR MUFFLER
If the generator is not equipped with a spark arrestor
exhaust muffler and is to be used on any forest cov-
ered, brush covered or grass covered unimproved
land, you may have to install a spark arrestor. The
spark arrestor must be maintained in effective work-
ing order by the vehicle owner/operator.
For assistance in ordering, installing and maintaining
spark arrestor exhaust mufflers, contact your nearest
Generac Authorized Service Dealer.
Exhaust mufflers supplied by Generac are spark
arrestor types. Generac exhaust mufflers for recre-
ational vehicle generators do not have a spark
arrestor screen, but are of the more efficient “toroid”
or “swirl” type. To remove carbon and combustion
deposits from such mufflers, remove the plug from
the muffler and run the engine for approximately 15
minutes. Shut down the engine, let the muffler cool
and install the plug.
Generac ® Power Systems, Inc. 13
PAPER
FILTER
FOAM
PRE-CLEANER
COVER
KNOB
TO FUEL PUMP
CUSTOMER FUEL CONNECTION
FUEL FILTER