Snowmobile Polaris 800 RMK / 800 Pro-RMK / 800 RMK (2010 year). Manual - part 19

77

MAINTENANCE

Intake Filters

The intake foam filters 
limit snow ingestion into 
the intake system. When 
operating in loose powder 
snow, check the foam fil-
ters periodically to 
remove any accumula-
tion of snow.

Fuel Pump

All fuel pump service must be performed by an authorized POLARIS 
dealer. Do not attempt to service the fuel pump.

Fuel Filter/Fuel Lines

See your POLARIS dealer for replacement of the fuel filter at the inter-
vals outlined in the Periodic Maintenance Table beginning on page 70

.

Contaminated or poor quality fuel will shorten the life of the fuel filter 
and result in poor engine performance. Always store fuel in clean fuel 
containers. If low fuel pressure or reduced engine performance occurs 
between the recommended fuel filter service intervals, the filter may 
need replacement. See your dealer.

Inspect the fuel lines regularly for signs of deterioration or damage. 
Always check fuel line condition after periods of storage. Normal dete-
rioration from weather and fuel compounds may occur. Replace worn or 
damaged fuel lines promptly.

NOTICE: Kinking the fuel lines or using a pliers or similar tools to remove fuel 

lines may cause damage to the lines. If a fuel line has been damaged 
or kinked, replace it promptly.

78

MAINTENANCE

Spark Plugs

Spark Plug Recommendations

A new engine can cause temporary spark plug fouling due to the preser-
vative added during the assembly process. Avoid prolonged idle speeds, 
which cause plug fouling and carbonization.

Refer to your Owner's Manual Supplement for the specific spark plug to 
be used in your snowmobile.

Change the spark plugs every 2000-2500 miles (3200-4000 km).

• Use recommended spark plugs with the proper gap.
• Use only resistor-type spark plugs.
• Torque spark plugs to 18-22 ft. lbs. (24-30 Nm).
• Always carry spare spark plugs.

NOTICE: Using non-recommended spark plugs can result in serious engine 

damage. A spark plug with a heat range too high will always cause 
engine damage if the engine is operated in conditions more severe 
than intended for that plug. Always use the spark plugs recommended 
for your snowmobile. See your Owner’s Manual Supplement.

79

MAINTENANCE

Spark Plugs

Spark Plug Inspection

Spark plug condition is indicative of engine operation. The spark plug 
firing end condition should be read after the engine has been warmed up 
and the vehicle has been driven at higher speeds. Immediately check the 
spark plug for correct color.

CAUTION! A hot exhaust system and engine can cause burns. Wear 
protective gloves when removing a spark plug for inspection.

1. Remove the left side panel.

2. Remove the spark plug cap.

3. Using the special wrench provided in the tool pouch, rotate the 

spark plug counter-clockwise to remove.

4. Reverse the procedure for spark plug installation. Torque to specifi-

cation.

5. Reinstall the spark plug cap.

Spark Plug Condition

Normal Plug

The normal insulator tip is gray, tan or light brown. There will be few 
combustion deposits. The electrodes are not burned or eroded. This indi-
cates the proper type and heat range for the engine and the service.

TIP: The tip should not be white. A white insulator tip indicates overheating, 

caused by use of an improper spark plug or incorrect carburetor/throttle 
body adjustments.

Wet Fouled Plug

The wet fouled insulator tip is black. A damp oil film covers the firing 
end. There may be a carbon layer over the entire nose. Generally, the 
electrodes are not worn. General causes of fouling are excessive oil or 
use of non-recommended injection oil.

80

MAINTENANCE

Oil Lines

Inspect oil line condition every 1000 miles (1600 km).

Oil Filter

The oil filter is located at the side of 
the oil tank. Have your dealer change 
the oil filter and bleed the system 
annually or every 1000 miles (1600 
km). 

TIP: The direction of the arrows indicates 

the direction of flow through the fil-
ter.