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MAINTENANCE AND LUBRICATION
Spark Plugs
Check your owner’s manual supplement for recommended spark plug
and gap.
The spark plug and its condition is indicative of engine operation. The
spark plug firing end condition should be read after the engine is
warmed up and the vehicle i s driven at higher speeds. Immediately
check the spark plug for correct color.
1. Normal
The 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 t ype 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 or incorrect
carburetion adjustments.
2. Wet Fouled
The 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 are excessive oil, use of
non-recommended injection oil, improper use of the choke, or incorrect
carburetion adjustments.
Spark Plug Removal and Replacement
The spark plug is removed by using the s pecial wrench provided in the
tool pouch. Remove the spark plug cap and then the spark plug by
rotating counterclockwise.
Reverse t he procedure for spark plug installation. Torque to 17 ft. lbs.
Never deviate from the recommended spark plug as engine damage can
occur.
Never attempt to remove a spark plug while the engine is warm.
The exhaust system or engine could burn you causing severe
injury.
WARNING
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