Polaris 2003 Genesis i Owner's Safety And Maintenance Manual page 88

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 proper dimension using a wire
thickness gauge.
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 removing the spark plug.
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
run.
Wipe any water from the spark plug and the inside of the cap. Install
the spark plug and torque to 18 ft. lbs. 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. Use dielectric
grease on 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.
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WARNING
WARNING