Muffler/Spark Arrester; Engine Oil - Filter - Arctic Cat 300 Utility Service Manual

When installing the spark plug, make sure to tighten it
securely. A new spark plug should be tightened 1/2 turn
once the washer contacts the cylinder head. A used spark
plug should be tightened 1/8-1/4 turn once the washer
contacts the cylinder head.

Muffler/Spark Arrester

The muffler has a spark arrester which must be periodi-
cally cleaned. At the intervals shown in the Periodic
Maintenance Chart, clean the spark arrester using the fol-
lowing procedure.
! WARNING
Wait until the muffler cools to avoid burns.
1. Remove the cap screw (1) securing the spark arrester
(2) to the muffler assembly; then carefully remove
the spark arrester.
2. Using a soft wire brush, clean the carbon from the
screen (3) taking care not to tear or damage the screen.
10
.
ATV0052B
3. Install the spark arrester and secure with the cap
screw. Tighten securely.

Engine Oil - Filter

Replace the engine oil and clean the screen/filter at the
scheduled intervals. The engine should always be warm
when the oil is changed so the oil will drain easily and
completely.
1. Park the ATV on level ground.
2. Loosen the oil fill plug.
3. Remove the screen/filter cap from the bottom of the
engine and drain the oil into a drain pan. Account for
a spring, O-ring, and screen/filter.
KM139A
4. Clean the screen/filter in parts-cleaning solvent; then
inspect the O-ring and replace if damaged.
KM140B
KM126A
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