SPARK
PLUG
Due to varying
fuel
properties
etc,, check every
10
hours
of operation. Replace as
required
or annua1ly,
-
providing
spark
plug
heat
range
and the
carburetor
calibration is
correct, the
spark
pfug
will have
a
brownish
tinge at
the
electrodes.
A
sooty
spark
plug
usually indicates
a bad
pfug
or faulty ignition system i.n a sound engine.
If
the
plug
is sooty wilh
oi1
deposits,
carburation
and
air
system
slrould
be checked.
If the
plug
has
'ruhite'r
electrodes vrith
rrmeLt'r
dropl-ets,
first suspect lean nixture. If calibration is correct and
there is no
evidence
of uanifold leaks or lack of fuel, chan8e
the
plug
to a colder range. Do check if
cooling systern
ia
operating coryecbfy.
Al
Attention: Heavy oi1
deposits on the electrodes and
insulator
cause
engine troubles and have to be removed
regularly
(every
10 hours
)
.
If,
after
cleaning or changing the
spark
plug, you
stiLf
have
an ignition
problen
and
no external
fault
is
found,
the
ignition
ul1it rrust be
checked.(see seclrion under ignition
syslen),
I
Never
clean 2-cycLe spark
P6h6hh6F l-^ .^116^+ l t
--
--^
^ -- -^J
gap
0,4
to 0,5 nrn or ,015 bo ,020
torqued
to 27
l,ln
or 240 in.fb,
plugs
with abrasive cleaners.
your plug
with
a wire
gauge
-
in.
Spark
pLug
nust be
cg
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