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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, the provided spark plug wrench is
required.
Refer to the Specification section (see page 64) for the recommended
spark plug type. Always torque spark plugs to the 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. Open the service door.
2. Remove the spark plug cap
(A).
B
A