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(CONT.)
PROBABLE
CAUSE
SERVICE
DIAGNOSIS
REMEDY
TROUBLE
Motor
over-
heats
Chain
stalls
in
cut.
Chain
moves
when
throttle
is closed.
Chain
cuts
roughly or
digs in.
Chain oiler
stops
pump-
ing.
Cylinder
fins
or
air system
clogged.
Incorrect fuel
mixture.
Carburetor
lean.
Loose
cylinder head
nuts.
Leaking cylinder head or
base
gaskets.
Clutch
slipping.
Improper filing or jointing.
Cutter
bar
and
chain
pinched in log.
Idling speed too
fast.
Top and
front angles
on cutters
incorrectly
filed.
Too
much joint.
Dirt
in pump
assembly
or
discharge
vent.
Clean.
Drain
tank,
refill with
correct mixture.
Adjust.
Tighten.
Check .and
replace
if
necessary.
Check
linings,
if worn
replace.
Check
filing
and
jointing instructions,
or see
your
servicing
dealer.
Use
wedge if necessary
to open cut wider to free bar and
chain.
Adjust
idle speed.
Check
filing
and
jointing instructions,
or
see your servicing
dealer.
Remove
and
clean pump
and
feed
line.
Fill with clean
oil.
(SAE 10 or 20.)
NOTE:
If-
motor idling is erratic
or
races
away
and
then
drops, it may indicate
the possibility
of excess air
en-
tering
the
crankcase.
i:'
this
condition
exists,
the
motor would
continue
to
idle
with
the idle
stop
screw
backed
completely
off.
Check
the
following
points:
(1.)
Cocked
throttle
shutter.
(2,)
Leaking
carburetor
gasket.
(3.)
Loose
carburetor
nuts.
(4.)
Leaking
crankshaft
seals.
(5.)
Improper
carburetor
adjustments.
8
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