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Spark Plug u Checking Spark Plug
64
Maintenance
9.
Check the spark plug gap using a
wiretype feeler gauge.
u If adjustment is necessary, bend the
side electrode carefully.
10.
Make sure the plug washer is in good
condition.
11.
With the plug washer attached, thread
the spark plug in by hand to prevent
cross-threading.
12.
Tighten the spark plug:
●
If the old plug is good:
1/8 turn after it seats
●
If installing a new plug, tighten it twice
to prevent loosening:
13.
Reinstall the spark plug cap. Take care
avoid pinching any cables or wires.
14.
Install the parts in the reverse order of
removal.
The gap should be:
0.031 to 0.035 in (0.80 to 0.90 mm)
Side
electrode
Spark plug gap
a) First, tighten the plug:
NGK: 1/2 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
NOTICE
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.
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