20
9.4
Spark
plug
service
Recommended
spark
plug:
BPR5ES
(NGK)
F7RTC
(LG)
To
ensure
proper
engine
operation,
the
spark
plug
must
be
properly
gapped
and
free
of
deposits.
1)
Remove
the
spark
plug
cap.
WARNING
If
the
engine
has
been
running
the
muffler
will
be
very
hot.
Be
careful
not
to
touch
the
muffler.
2)
Visually
inspect
the
spark
plug.
Discard
it
if
the
insulator
is
cracked
or
chipped.
3)
Measure
the
plug
gap
with
a
feeler
gauge.
The
gap
should
be
0.7
‐
0.8mm
(0.028
‐
0.031
in),
Correct
as
necessary
by
bending
the
side
electrode.
4)
Attach
the
plug
washer,
thread
the
plug
in
by
hand
to
prevent
cross
‐
threading.
5)
When
mounting
a
new
spark
plug,
you
should
screw
1/2
more
thread
with
the
wrench
after
the
washer
is
compressed.
If
you
are
mounting
an
old
one,
you
should
only
screw
1/8
‐
1/4
more
thread.
CAUTION:
The
spark
plug
must
be
securely
tightened.
An
improperly
tightened
plug
can
become
very
hot
and
possibly
damage
the
engine.
Never
use
a
spark
plug
with
an
improper
heat
range.
Summary of Contents for DT36V
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