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• Installbarclampnutsandfinger
tightenonly.Donottightenanyfur-
theratthispoint.
Bar CIamp Nuts
CHAIN ADJUSTMENT
See CHAIN TENSION in MAINTENANCE
section.
CHANGE FUEL FILTER
To change fuel filter, drain your unit by
running dry of fuel, remove fuel cap/re-
tainer assembly from tank. Putt the fil-
ter from the tank and replace with a
new filter.
CARBURETOR ADJUSTMENT
Zt
dl_ WARNING: The chain will be
moving during most of this procedure.
Wear your protective equipment and
observe all safety precautions. During
the low speed mixture adjustment re-
check idle speed after each turn of the
screw. The chain must not move at idle
speed.
Carburetor adjustment is critical and if
done improperly can permanently
damage the engine as welt as the car-
buretor. If you require further assis-
tance or are unsure about performing
this procedure, caIt our customer as-
sistance help line at 1-800-235-5878.
Old fuel, a dirty air filter, dirty fueI filter,
or flooding may give the impression of
an improperly adjusted carburetor.
Check these conditions before adjust-
ing the carburetor.
The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol-
lowing conditions:
• Chain moves at idle. See IDLE
SPEED under adjusting procedure.
• Saw witt not idle. See iDLE SPEED-T
and LOW SPEED MIXTURE-L under
adjusting procedure.
• Engine dies or hesitates when it
should accelerate. See ACCELERA-
TION CHECK under adjusting
procedure.
• Loss of cutting power. See HIGH
SPEED MIXTURE - H under adjusting
procedure.
There are three adjustment screws on
the carburetor. They are Iabeled H, L,
and T. They are located in the area just
above the primer bulb.
CARBURETOR PRESETS
When making adjustments, do not
force the plastic limiter caps beyond
the stops or damage will occur.
If carburetor presets are not needed,
proceed to IDLE SPEED-q_
• Turn both mixture screws counter-
clockwise untit they stop.
• Turn the idle speed screw clockwise
until it stops. Now turn counterclock-
wise 4-1/2 futt turns.
Start motor, let it run for 3 minutes, and
proceed to the adjustment section. If
engine does not start, refer to the
TROUBLESHOOTING CHART or catt
1-800-235-5878.
tf engine performance is acceptable at
the preset positions and there is no
chain movement at idle, no further ad-
justment is necessary.
ADJUSTING PROCEDURE
Idle Speed-T
Allow engine to idle. Adjust speed until
engine runs without chain movement
or stalling.
• Turn clockwise to increase engine
speed if engine stalls or dies.
• Turn counterclockwise to decrease
speed.
No further adjustments are necessary
if chain does not move at idle speed
and if performance is satisfactory,
Low Speed Mixture-L
Allow engine to idle. Then accelerate
the engine and note performance. If
engine hesitates, bogs down, or
smokes during acceleration, turn mix-
ture screw clockwise in t/16-turn incre-
ments untii performance is satisfactory.
Repeat this procedure as necessary
for proper adjustment. After completing
adjustments, check for acceleration
and chain movement at idle. Reset if
necessary.
High Speed Mixture-H
DO NOT operate engine at full throttle
for prolonged periods while making ad-
justments. Damage to the engine can
15
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