7.
Check that the spark plug washer
is
in
good condition, and thread the spark plug
in
by
hand
to
prevent cross-threading.
8.
After !he spark plug
is
seated, tighten with a spark plug wrench to compress the washer.
-11
installing a new spark plug, tighten 1/2 turn after the spark plug seats
to
compress the washer.
If
reinstalling a used spark plug, tighten
1
/8-1
/4 turn after the spark plug seats
to
compress the washer.
NOTICE I The
spark
plug
must
be
securely
tightenecL
An
impmperly
tightened
spark
plug
can
become
very
hot
and
could
damage
the
engine.
Never use
spark
plugs
which
have an
improper
heat range. Use
only
the recommended-spark
plugs
or
equivalent
28
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