obviously worn out or the insulation ring on it is broken or
cracked. Clean the spark plug with a brush when put it back in
place.
3) Check the plug gap with a feeler gauge. Vary the gap by
moving the side electrode. Normal plug gap: 0.70~0.80mm
4) Check the plug O-ring for normal condition. Screw it in with
the plug wrench to protect the plug thread.
NOTE:
·In the case of screwing in a new spark plug, tighten it by
an additional 1/2 screw turn after the plug reaches and pushes
on the O-ring, while in the case of a used spark plug, an
additional 1/2~1/4 screw turn is necessary.
CAUTION:
· Make sure the spark plug is properly tightened.
Improper tightening may cause the engine to be overheated
or damaged. Never use spark plugs with an incorrect thermal
value range.
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