Arctic Cat AC 120 2007, Operator'S Manual

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4. Turn the gas tank shut-off valve to
the OPEN position.
AIR CLEANER/FILTER
The air filter inside the air cleaner hous-
ing must be kept clean to provide good
engine power and gas mileage. If the
snowmobile is used under normal con-
ditions, service the filter at the intervals
specified. If operated in adverse condi-
tions, inspect and service the filter more
frequently. Use the following procedure
to remove the filter and to inspect and/
or clean it.
1. Remove the wing nut securing the
air cleaner cover; then remove the
cover.
2. Remove the foam filter from the
housing.
3. Clean the foam filter in a non-flam-
mable cleaning solvent; then allow
the filter to dry.
„
NOTE: Foam Filter Cleaner
(p/n 0436-194) and Foam Filter Oil
(p/n 0436-195) are available from
Arctic Cat.
4. Put the dry filter in a plastic bag;
then pour in recommended air filter
oil and work the oil into the filter.
5. Clean any debris from inside the air
cleaner. Be sure no debris enters
the carburetor.
6. Place the filter into the housing.
7. Place the air cleaner cover onto the
housing; then secure with the wing
nut.
SPARK PLUG
The recommended spark plug to use is
NGK BPR6ES. The correct spark plug
gap is 0.7 mm (0.028 in.). Varying ter-
rain conditions and operating usage
may require a spark plug of a different
heat range.
Checking Spark Plug
To see if the spark plug being used is of
the proper heat range for the conditions
in which it has been operated, pull the
spark plug cap off the spark plug,
remove the spark plug from the cylinder
head, and examine the condition of the
center electrode insulator.
! CAUTION
Failure to inspect the air filter fre-
quently if the snowmobile is used
in adverse conditions can dam-
age the engine.
! CAUTION
A torn air filter can cause damage
to the engine. Contaminants may
get inside the engine if the filter is
torn. Carefully examine the filter
for tears before and after cleaning
it. Replace the filter with a new
one if it is torn.