Service and Maintenance of the Spark Plug
Remove the spark plug from the engine. If the color of the
insulator skirt of the spark plug is brown it indicates that the
carburetor is adjusted properly. Any signs of buildup on the plug
should be noted as this could be a sign of an incorrect carburetor
adjustment.
Cleaning the Spark Plug
Inspect the spark plug for carbon buildup. If there are noticeable
deposits or wear on the spark plug, replace.
It is normal for the
spark plug to be light
brown. This
indicates a proper air
fuel mixture.
Correct spark plug gap helps fuel
economy and performance. Incorrectly
gapped spark plugs can lead to hard
starting and poor performance. Always
replace the spark plug with the original
NGK replacement.
When removing and tightening the
spark plug, be sure to use the correctly
sized socket. Improper removal can
result in spark plug damage that can
result in costly repairs.
Check the electrode gap of
the spark plug with a gauge
and adjust the gap to 0.025
inches.
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