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MAINTENANCE AND LUBRICATION
Spark Plugs
A spark plug with cracked porcelain or damaged
threads should be changed immediately. If the
electrodes are badly worn or burned the plug should
also be replaced.
If the spark plug is in good condition, clean it with a
clean shop cloth and/or wire brush. Adjust the gap to
the recommended dimension using a wire thickness
gauge.
Wipe any water from the spark plug and the inside of
the cap. Install the spark plug and torque to 18 ft. lbs.
(24 Nm). If a torque wrench is not available, 1/4 to 1/2
turn beyond finger-tight is close to the correct torque.
Push the cap down on the plug until it clicks.
NOTE: Apply dielectric grease to the inside of the
spark plug cap to prevent corrosion. Before installing
a used plug, wipe off the threads and apply dielectric
grease. Also clean the gasket surface.
WARNING
Removing a spark plug while the engine or
exhaust system is hot could result in serious
burns. Wait until the engine has cooled or wear
protective gloves while servicing the spark plug.
WARNING
High tension voltage is present in the spark plug
wires when the engine is running. Contacting the
wires could cause serious injury. Never touch
spark plug wires when the engine is being
cranked or operated.