SPARK
PLUG
SERVICE
In
order
to
ensure
the
engine
normal running, gap
of
the spark
plug
must
be
correct
and no
deposit around the spark plug.
Spark recommended using plug
model TORCH:
FSTC/FSRTC
0.7-0.Bmm
A
WARNING
Don't
touch
the
muffler
to
avoid
burn
in
the
engine
running
or
just
stopping a moment.
1.
Remove
tlie spark plug
cap.
2.
Clear away
dirt
aroimd tlie spark plug
base.
3.
Dismantle the spark plug
witli
a spark plug wrench.
11 I Maintenance
4.
Visually check the spark plug. Clean
with
a steel brush.
If
the
insulator
is
damaged, replace the spark plug instead.
5.
Measure
the
spark
plug
clearance
with
a
feeler.
The
clearance should
be
0.7-0.8mm.
If
adjustment
is
necessary,
bend the side electrode carefully.
6.
To
avoid cross-threading, first, screw in spark plug by hand,
then
tighten
with
a spark plug
wrench
to
compress
tlie
gasket.
7.
If
a new spark plug
is
used,
please replace
it
with
same
spark
plug model
as
can
as
possible,
and
more
twist
1/2
turns after
compressing the gasket.
8.
If
reinstalling
tlie
used spark plug,
just
more
twist
1/8-1/4
turns.
A
CAUTION
The
spark
plug
must
be
tightened securely,
or
it
may
become very
hot
damage the engine.
Only
use
recommended spark plug
or
the equivalent.
Incorrect heat range
of
the spark plug may damage
the engine.
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