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Initial Settings
1. Turn both mixture screws (L and H)
counterclockwise until they stop.
2. Turn the idle speed screw clockwise
until it stops. Now turn counterclock-
wise 4-1/2 turns.
3. Start engine 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 ad-
justments are necessary. If engine
does not start, refer to the TROUBLE-
SHOOTING TABLE. If still unable to
remedy situation, call
1-800-235-5878.
Idle Speed
Allow engine to idle. If the blade
moves, idle speed is too fast. If the en-
gine stalls, idle speed is too slow.
• Turn idle speed screw clockwise to
increase engine speed.
• Turn idle speed screw counterclock-
wise to decrease engine speed.
_WARNING: Recheck the idle
speed after each adjustment. The
blade must not move at idle speed to
avoid serious injury to the operator and
others.
Low Speed Mixture - L
1. Allow the engine to idle.
2. Turn low speed mixture screw (L)
slowly clockwise until the speed
starts to drop.
3. Turn the low speed mixture screw (L)
counterclockwise until the speed in-
creases and then starts to drop again.
4. Set the low speed mixture screw (L)
at the midpoint between the two
positions.
Readjust the idle speed (see IDLE
SPEED).
High Speed Mixture - H
CAUTION: Do not operate engine at full
throttle for prolonged periods while mak-
ing high speed adjustments as damage
to the engine can occur. Adjust the high
speed screw 1/16 of a turn at a time. A
1/16 turn is about the width of the slot in
the top of the screw.
1. Allow the engine to idle.
2. Squeeze the throttle trigger fully.
Turn the high speed mixture screw
(H) counterclockwise until it stops.
3. Turn the high speed mixture screw
(H) screw the minimum amount
clockwise until the engine runs
smoothly.
After completing adjustments, check
for acceleration and blade movement
at idle. Reset if necessary.
Acceleration Check
If the engine dies or hesitates instead
of accelerating, turn the low speed mix-
ture screw (L) counterclockwise until
you have smooth acceleration with no
blade movement at idle.
CAUTION: If the engine does not op-
erate according to these instructions
after repeating the adjusting steps, do
no use the unit. Take it to your Sears
Service Center.
-9-
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