54
MAINTENANCE
Spark Plug
Spark Plug Inspection and Replacement
Using a non-recommended spark plug can result in serious engine
damage. Always use recommended spark plugs.
Note: In order to service the spark plug, a commercially available spark plug
wrench is required.
Refer to the “Specification” (page 62) for the recommended spark plug
type. Always torque the spark plug to specification.
Note: To ensure proper engine operation, the spark plug must be free of
deposits and properly gapped. If the engine has been running, allow it to
cool before servicing.
Normal Spark 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.
Note: The tip should not be white. A white insulator tip indicates overheating,
caused by use of an improper spark plug, fuel, or incorrect carburetor
adjustments.
Wet Fouled Spark 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.
1. Remove the top of the generator by
removing the 4 bolts (A) in the top
through the handles.
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