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Spark Plugs u Checking Spark Plugs
75
Maintenance
8.
With the plug washers attached, thread
the spark plugs in by hand to prevent
cross-threading.
9.
Tighten each spark plug:
● If the old plug is good:
● If installing a new plug, tighten it twice
to prevent loosening:
10.
Reinstall the spark plug caps. Avoid
pinching any cables or wires.
11.
Install the parts in the reverse order of
removal.
1/8 turn after it seats
a) First, tighten the plug:
NGK: 2/3 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 plugs can damage the engine.
If a plug is too lose, a piston may be damaged. If a plug is
too tight, the threads may be damaged.
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