Polaris 800 RMK, 800 Pro RMK Owner's Manual
![Polaris 800 RMK, 800 Pro RMK manual cover](/images/b0acbf296a9c2f4afa85c563/thumbs/thumb175x175.webp)
To break in a new Polaris 800 RMK engine, you should perform a heat cycle by running the engine at varying RPMs for short periods. Avoid full throttle and maintain a mix of 50:1 fuel for the first tank. Gradually increase engine load over the next several hours of operation.
The recommended maintenance schedule includes checking chaincase oil, greasing suspension and steering components every 500 miles, inspecting drive belt and clutches every 1000 miles, and changing spark plugs annually or every 3000 miles.
Difficulty starting in cold weather can be caused by improper fuel/air mixture, old spark plugs, or a weak battery. Ensure the choke is used correctly, spark plugs are clean, and the battery is fully charged.
To improve fuel efficiency, ensure regular maintenance like keeping the air filter clean, maintaining proper track tension, and using recommended fuel grades. Riding at moderate speeds and avoiding aggressive acceleration can also help.
If the engine overheats, immediately stop the machine and let it cool. Check for coolant leaks, ensure the radiator is clean, and verify the coolant level. Avoid riding in deep, powdery snow without adequate airflow to the engine.
To adjust the track tension, first elevate the snowmobile. Loosen the rear axle bolts, then adjust the tension bolts evenly on both sides until the track has 1/2 inch to 3/4 inch of sag with moderate pressure. Tighten the axle bolts after adjustment.
Polaris recommends using their VES (Variable Exhaust System) Synthetic 2-Stroke Oil for optimal performance and protection of the 800 RMK engine.
To troubleshoot a misfiring engine, check the spark plugs for wear or carbon build-up, inspect the ignition coils, and ensure the fuel system is clean. Replacing old fuel and ensuring proper carburetor settings can also resolve misfiring issues.
For off-season storage, drain the fuel system or add a stabilizer, fog the engine with fogging oil, clean and lubricate moving parts, and store the machine in a dry, covered location. Remove the battery and store it in a cool, dry place.
Common clutch issues include belt slippage and poor engagement. Check for worn or damaged belts, clean the clutch sheaves, and ensure proper clutch alignment. Replacing worn weights or springs may also be necessary.