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Section 3 – Maintenance
PRIMEPACT 50 Recreational Vehicle Generator
3.3 MAINTAINING THE ENGINE
AIR CLEANER
3.3.1 CLEANING THE FOAM PRECLEANER
Clean and re-oil the foam precleaner every three
months or every 25 hours of operation, whichever
occurs first. Service the foam precleaner more fre-
quently if operating the generator in extremely dusty
or dirty conditions. Use the following procedure
(Figure 3.2):
1. Turn the two screws counterclockwise to loosen.
2. Remove the cover, foam precleaner and paper filter.
3. Remove the foam precleaner from the cover.
4. Wash the foam precleaner in liquid detergent and
water.
5. Wrap the foam precleaner in a clean cloth and
gently squeeze it dry.
6. Saturate the foam precleaner in clean engine oil.
Gently squeeze it in a clean cloth to remove
excess oil and to distribute oil (DO NOT TWIST).
7. Install the foam precleaner into the cover, fol-
lowed by the paper filter.
8. Install the cover, foam precleaner and paper filter.
9. Tighten the two screws to retain the filter in place.
Figure 3.2 – Engine Air Cleaner
3.3.2 CLEANING OR REPLACING
THE PAPER FILTER
Once each year or every 100 hours of operation
(whichever comes first), clean or replace the paper
filter. The new replacement filter must be flame retar-
dant. Service the paper filter more frequently if oper-
ating the generator in extremely dusty or dirty condi-
tions. Use the following procedure (Figure 3.2):
1. Follow steps 1-3 in Section 3.3.1; service the
foam precleaner if necessary.
2. Remove the paper filter.
3. Clean the air filter by tapping it gently on a solid
surface. If the filter is too dirty, replace it with a
new one. Dispose of the old filter properly.
4. Clean the air cleaner cover then reassemble
following steps 7-9 in Section 3.3.1.
3.4 CLEAN AIR INTAKE
Clean all foreign material from the air intake (Figure
3.3) at least once every 100 hours of operation. 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 3.3 – 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 3.4).
Figure 3.4 – 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.
!
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PAPER
AIR FILTER
FOAM
PRECLEANER
AIR CLEANER
COVER
SCREWS
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Generac
®
Power Systems, Inc. 13