Piper Lance II - Page 337

LANCE
II
SERVICE
MANUAL
8-40.
INSPECTION
AND
CLEANING
OF
SPARK
PLUG.
a.
Visually
inspect
each
spark
plug
for
the
following
non-repairable
defects:
1.
Severely
damaged
shell
or
shield
threads
nicked
up,
stripped
or
cross-threaded.
2.
Badly
battered
or
rounded
shell
hexagons.
3.
Out-of-round
or
damaged
shielding
barrel.
4.
Chipped,
cracked
or
broken
ceramic
insulator
portions.
5.
Badly
eroded
electrodes
worn
to
approximately
50%
of
original
size.
b.
Clean
the
spark
plug
as
required,
removing
carbon
and
foreign
deposits.
c.
Test
the
spark
plug
both
electrically
and
for
resistance.
d.
Set
the
electrode
gap
at
0.015
to
0.018
inches.
8-41.
INSTALLATION
OF
SPARK
PLUGS.
Before
installing
spark
plugs,
ascertain
that
the
threads
within
the
cylinder
are
clean
and
not
damaged.
a.
Apply
anti-seize
compound
sparingly
on
the
threads
and
install
gasket
and
spark
plugs.
Torque
360
to 420
inch-pounds.
CAUTION
Make
certain
the
deep
socket
is
properly
seated
on
the
spark
plug
hexagon
as
damage
to
the
plug
could
result
if
the
wrench
is
cocked
to
one
side
when
pressure
is
applied.
b.
Carefully
insert
the
terminal
insulator
in the
spark
plug
and
tighten
the
coupling
nut.
Issued:
1/3/78
POWER PLANT
2C1