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Spark Plug u Checking Spark Plug
56
Maintenance
8.
Inspect the electrodes and center
porcelain for deposits, erosion or carbon
fouling.
uIf the erosion or deposit is heavy,
replace the plug.
9.
Make sure that a 1.0 mm wire-type feeler
gauge cannot be inserted between the
spark plug gap. If the gauge fits in the gap,
replace the plug with a new one.
10.
Make sure the plug washer is in good
condition.
11.
Install the spark plug. 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 to
avoid pinching any cables or wires.
14.
Install the parts in the reverse order of
removal.
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
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.
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