Polaris 800 INDY XC 129 2019 Owner's Manual page 136

MAINTENANCE
FOGGING THE ENGINE
Fogging the engine with Polaris fogging oil or similar commercial alternative is
probably the most important storage step a rider can do to ensure the internal
parts of their snowmobile's engine do not rust and corrode during the storage
season.
To fog the engine, do the following:
1. Remove the spark plugs from the engine.
2. Liberally spray fogging oil into each spark plug hole. If possible, have an
assistant slowly pull on the recoil rope to rotate the engine while spraying the
oil into each cylinder.
3. Loosely install the spark plugs.
Do not install new spark plugs after fogging the cylinders. Fogging oil prevents
the formation of rust / corrosion by sticking to the internal engine components –
including the spark plug electrodes. Replace these spark plugs the following
season after all of the fogging oil has been burned out of the engine.
DRIVE BELT STORAGE
Never leave the drive belt installed in the clutches as oxidation may form where
the belt contacts the aluminum clutch sheave faces.
To clean the drive and driven clutches, do the following:
1. Remove the primary and secondary drive belt from the snowmobile.
2. Inspect the drive belt for wear and glazing. Compare the primary belt with the
back-up (secondary) belt. Decide if a new belt is needed next season and
note the primary belt can now be used as the back-up belt next season.
3. Clean the driven and driven clutch sheaves with Isopropyl Alcohol. Allow the
alcohol to air dry. Continue cleaning the sheave faces until all belt residue is
removed.
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