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98
MAINTENANCE AND LUBRICATION
Spark Plugs
Polaris Model Recommended Spark Plug
Sportsman 400 BKR5E
Sportsman 500 BKR6E
Sportsman 600 RC7YC
Sportsman 700 RC7YC
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.
1. Normal
The normal insulator tip is gray, tan or light brown. There will be few
combustion deposits. The electrodes are not burned or eroded. This
indicates the proper type and heat range for the engine and the service.
NOTE: The tip should not be white. A white insulator tip indicates
overheating, caused by use of an improper spark plug or incorrect
carburetion adjustments.
2. Wet Fouled
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,
use of non-recommended oil, improper use of the choke, or incorrect
carburetion adjustments.
Spark Plug Removal and Replacement
1. Remove the spark plug cap.
2. Using the special wrench provided in the tool pouch, rotate the
spark plug counterclockwise to remove.
3. Reverse the procedure for spark plug installation, using the
recommended spark plug. Torque to 18 ft. lbs. (24 Nm).
Using non-recommended spark plugs can result in serious engine
damage. Always use Polaris-recommended spark plugs.
CAUTION
WARNING
A hot exhaust system and engine can cause serious burns. Wear
protective gloves when removing a spark plug for inspection.
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