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MAINTENANCE
Spark Plugs
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.
NOTE: The tip should not be white. A white insulator tip indicates over-
heating, caused by use of an improper spark plug or incorrect
carburetor/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, 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 it.
3. Reverse the procedure for spark plug installation.
4. Torque the spark plug to specification. See page 79.
5. Verify that gap is within specification. See your Owner’s Manual
Supplement.
6. Reinstall the spark plug cap.