SPARK
PLUG
The
type
spark
plug
provided
in
your
engine
is
listed
as
medium
in
the
spark
plug
heat range
chart·
Prestolite 14
L4
or
equivalent. (Prestolite
14RL4
or
equivalent
in Canada)
Shank
Length
7/16"
(11.11
mm)
Thread Size
14
MM
Gap
Setting
.
025
Inch
(0.
64
mm)
NOTE:
I t
is
possible
that
under
unusual
conditions,
"colder"
type
spark plug may
be
required.
Consult
your
Authorized
Ca
se Dealer
re
o
garding the
proper
type
spark
plug
to
use
for
your
particular
condition
.
The spark plug plays a very
important
part
in the
power,
fuel
economy
and general
performance
of
your
eng.ine. The
outside
of
the
plug
should
be
cleaned
frequently
to
prevent
shorting
of
the plug.
The
spark plug should
be
removed, checked, cleaned and gapped at the end
of
every
100
hours
of
operation.
REMOVING
It
is
important
to select the exact size spark plug
wrench.
The
wrong
size
or
type
wrench
may ca
use
distortion
and
insulator
breakage.
Always
use
a spark plug
wrench
or
a
thin
wall deep socket
wrench
of
the recommended size.
THIS
TYPE
OF
CRACK
IS
Thoroughly
clean the s
park
plug,
USUALLY
CAUSED
BY
including
the threads,
with
a pen
knife
or
wire
brush and solvent. A
1.
DROPPING
PLUG
very
slight
drag should
be
felt
when
the gauge
wire
passes
between the
2.
STRIKING
PLUG
WITH
electrodes.
WRENCH
DURING
INSTALLATION
Reset the gaps
by
bending the side
electrode
only.
Never bend the center
electrode.
INSTALLING
Install the spark plug in the engine,
with
a new gasket, and seat the
plug
ROUND
FEELER
GAUGE
finger tight"
on
the gasket.
Tighten
the
WI
LL
GIVE
A
MORE
plug
about
3/ 4
of
a
turn
after
the plug
ACCURATE
READING
is
seated
firmly
on its gasket. I f a
FIGURE
23
torque
wrench is available,
tighten
the
plug to 27
foot·pounds
(
36
.6
Newton·
metre).
This
will
as
s
ure
proper
seating
Do
not
use abrasive cleaning ma-
and
seal
ing
of
the spark plug. chines.
·36·
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