Polaris 600 IQ Racer Owner's Manual page 71

Spark Plugs
Spark Plug Condition
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 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
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 injection oil, improper use of the choke, or incor-
rect 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.
4. Torque to 18-22 ft. lbs. (24-30 Nm).
5. Reinstall the spark plug cap.
MAINTENANCE
67