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MAINTENANCE AND LUBRICATION
Spark Plugs
Refer to page 7 for the correct spark plug for your machine.
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 is 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 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 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, improper
use of the choke, or incorrect carburetion adjustments.
Spark Plug Removal and Replacement
The spark plug is removed by using the special wrench provided in the
tool pouch. Remove the spark plug cap and then the spark plug by
rotating counterclockwise.
Reverse the 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