Polaris Ranger 4x4 500 EFI Owner's Manual page 84

Spark Arrestor
Use the following procedure to periodically purge accumulated carbon
from the exhaust pipe.
1. Remove the arrestor clean-out
plugs located on the bottom of
the muffler.
2. Shift the transmission to neutral.
Apply the brakes. Start the
engine.
3. Purge accumulated carbon from
the system by momentarily rev-
ving the engine several times.
4. If carbon is expelled, cover or
plug the exhaust outlet and rap
on the pipe around the clean-out
plugs while revving the engine several more times.
5. If particles are still suspected to be in the muffler, elevate the rear of
the vehicle one foot higher than the front. Apply the brakes. Engage
the park brake. Block the wheels. Make sure the transmission is in
neutral and repeat steps 3 and 4 until no more particles are expelled
when the engine is revved.
6. Stop the engine. Allow the arrestor to cool.
7. Reinstall the arrestor plugs and remove the outlet cover or plug.
MAINTENANCE
Exhaust
Outlet
Clean-Out
Plugs
81