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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
indicates 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
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, use of non-
recommended injection oil or incorrect throttle
body adjustments.
SPARK PLUG REMOVAL AND
REPLACEMENT
1. Remove the spark plug cap.
2. Using the spark plug wrench provided in the
tool kit, remove the plug by rotating it counter-
clockwise.
3. Reverse the procedure for spark plug
installation. Torque to 14 ft. lbs. (19 Nm).
110
MAINTENANCE
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