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We recommend all service and adjust-
ments not listed in this manual be per-
formed by your Sears Service Center.
CARBURETOR ADJUSTMENT
Carburetor adjustment is critical and if
done improperly can permanently dam-
age the engine as well as the carburetor.
If you require further assistance or are
unsure about performing this procedure,
call our customer assistance help line at
1-800-235-5878.
Old fuel, a dirty air or fuel filter, or flood-
ing may give the impression of an im-
properly adjusted carburetor. Check
these conditions before adjusting the
carburetor.
The carburetor has been carefully set at
the factory. Adjustments may be neces-
sary if you notice any of the following
conditions:
• Engine will not idle. See IDLE SPEED
and MIXTURE under adjusting
procedure.
• Engine dies or hesitates instead of ac-
celerating. See ACCELERATION CHECK
under adjusting procedure.
• Loss of power. See MIXTURE under
adjusting procedure.
S2e'e
Screw ............_ O __,,,_,.__Oi _1_
Mixture Screw
(with Limiter Cap)
ADJUSTING PROCEDURE
CAUTION: Do not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
Initial Settings
1. Turn the mixture screw counterclock-
wise until it stops.
2. Turn the idle speed screw clockwise
until it stops. Then turn counterclock-
wise 4 1/2 turns.
3. Start motor and let it run for 3 min-
utes, then proceed to adjust screws
according to the instructions below.
If engine performance at initial set-
tings is acceptable, no further adjust-
ments are necessary. If engine does
not start, refer to TROUBLESHOOTING
TABLE. If still unable to remedy situ-
ation, call 1-800-235- 5878.
Idle Speed "IDLE"
Allow engine to idle. Adjust speed until
engine runs without stalling.
• Turn IDLE screw clockwise to increase
engine speed.
• Turn IDLE screw counterclockwise to
decrease engine speed.
Mixture "MIX"
Allow engine to idle. Then accelerate the
engine and note performance. If engine
hesitates, bogs down, or smokes during
acceleration, turn MIX screw clockwise in
1/16-turn increments until performance
is satisfactory. Repeat this procedure as
necessary for proper adjustment. After
completing adjustments, check for accel-
eration. Reset if necessary.
Acceleration Check
If engine dies or hesitates instead of ac-
celerating, turn MIX screw counterclock-
wise until you have smooth acceleration.
-10-
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