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Maintenance
Spark Plug
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Checking Spark Plug
6.
Check the spark plug gap using a wire
type feeler gauge.
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If adjustment is necessary, bend the
side electrode carefully.
The gap should be:
0.8 to 0.9 mm (0.03 to 0.04 in)
7.
Make sure the plug washer is in good
condition.
8.
Install the spark plug. With the plug
washer attached, thread the spark plug in
by hand to prevent cross-threading.
9.
Tighten the spark plug:
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If the old plug is good:
1/12 turn after it seats.
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If installing a new plug, tighten it twice
to prevent loosening:
a) First, tighten the plug:
NGK: 1/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/12 turn after it seats.
NOTICE
An improperly tightened spark plug can damage the
engine. If a plug is too loose, a piston may be damaged.
If a plug is too tight, the threads may be damaged.
10.
Install the parts in the reverse order of
removal.
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When reinstalling the spark plug cap,
take care to avoid pinching any cables
or wires.
Spark plug gap
Side electrode
