Polaris Sportsman 400, Service Manual

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MAINTENANCE
2.24
AIR BOX SEDIMENT TUBE
Periodically check the air box drain tube located toward the
rear of the machine. Drain whenever deposits are visible
in the clear tube.
NOTE: The sediment tube will require more frequent ser-
vice if the vehicle is operated in wet conditions or at high
throttle openings for extended periods.
1. Remove drain plug from end of sediment tube.
2. Drain tube.
3. Reinstall drain plug.
BREATHER FILTER INSPECTION
Four cycle ATV engines are equipped with a breather filter.
The in-line filter is similar in appearance to a fuel filter, and
is visible on the left side (Location A).
1. In-line breather filters should be installed with the
arrow pointing toward the engine (away from the air
box).
NOTE: In-line breather filter service life is extended when
the foam air box pre-filter is in place and maintained prop-
erly. Never operate the engine without the pre-filter.
BREATHER HOSE
1. Be sure breather line is routed properly and secured in
place. CAUTION: Make sure lines are not kinked or
pinched.
Sediment Tube
In-Line Breather Filter
Location A
Typical Breather Filter Location