Idle Speed; Low Speed Mixture; High Speed Mixture; Acceleration Check - Craftsman 358.796330 Instruction Manual

The carburetor has been carefully set
at the factory. Adjustments may be
necessary if you notice any of the fol-
lowing conditions:
• The blade moves at idle. See IDLE
SPEED under adjusting procedure.
• Engine will not idle. See IDLE SPEED
under adjusting procedure.
• Engine dies or hesitates instead of
accelerating. See ACCELERATION
CHECK under adjusting procedure.
• Loss of power. See MIXTURE AD-
JUSTMENT (L or H) under adjusting
procedure.
There are three adjustment screws on
the carburetor. The low speed mixture
screw is marked with the letter L, and
the high speed mixture screw is
marked with the letter H. The third
screw is the idle speed screw.
Speed Screw
LOWSpeed High Speed f'_
Mixture Mixture
Screw Screw
ADJUSTING PROCEDURE
CAUTION: DO not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
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, varying the speed with the trig-
ger; 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 idl_ 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.
_i;_ 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 clock-
wise 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 mixture
screw (L) counterclockwise until you
have smooth acceleration. It may be
necessary to readjust idle speed. The
blade must not move at idle speed.
CAUTION: If the engine does not op-
erate according to these instructions
after repeating the adjusting steps, do
not use the unit. Take it to your Sears
Service Center or call the Customer
Assistance Helpline at 1-800-235-5878.
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