Polaris PMS 419 User Manual
87
MAINTENANCE
Spark Plugs
Spark Plug Removal and Replacement
1. Remove both seats.
2. Remove the rear service
panel. See page 31.
3. Remove the spark plug cap.
4. Using the spark plug wrench
provided in the tool kit,
remove the plug by rotating
it counter-clockwise.
remove the plug by rotating
it counter-clockwise.
5. Reverse the procedure for
spark plug installation.
Torque to specification. See
page 86.
Torque to specification. See
page 86.
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.
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 throttle body adjust-
ments.
ments.
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, use
of non-recommended injection oil or incorrect throttle body adjust-
ments.
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 or incorrect throttle body adjust-
ments.
Spark Plugs