93
MAINTENANCE
Spark Plugs
Spark Plug Removal and Replacement
1. Remove the cargo box
access panel.
2. Clean the area around the
spark plugs before remov-
ing the plugs.
3. Remove the spark plug
caps.
4. Using the spark plug
wrench provided in the tool
kit, remove the plugs by
rotating them counter-
clockwise.
5. Reverse the procedure for
spark plug installation.
Torque to specification. See
page 92.
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 throttle body adjust-
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. Fouling may be caused by excessive oil or by
frequent short trips, especially in cold weather.
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