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equipment and observe all safety in-
structions.
Remove blade before making carbu-
retor adjustments.
Do not make ad-
justments from the blade side of the
unit. Hold the unit with your hand.
Recheck idle speed after each adjust-
ment. The blade shaft must not turn
at idle speed to avoid serious injury to
the operator or others.
• Poor engine performance can be the
result of other causes such as dirty
air filter, carbon build-up
on muffler
outlets, etc. See TROUBLESHOOT-
ING TABLE before proceeding with
carburetor adjustments.
• For best results, it is recommended
that you have a Sears Service Cen-
ter make all carburetor adjustments.
Your dealer has the training, experi-
ence, and tools necessary to proper-
ly adjust your unit to meet our facto-
ry performance specifications.
This
service is nat covered by warranty. If
it becomes necessary for you to
make carburetor adjustments your-
self, follow the described procedures
very carefully.
• Very small adjustments
can affect
engine performance.
It is important
to turn the screw a very small
amount per adjustment and test per-
formance before making further ad-
justments.
Each adjustment should
be no more than the width of the slot
in the adjusting screw.
• This is a complicated task. Follow
instructions
in sequence as indi-
cated.
The carburetor
has been carefully set
at the factory.
Adjustments
may be
necessary if you notice any of the fol-
lowing conditions:
• Engine will not continue to run at idle
position. See IDLE SPEED ADJUST-
MENT and LOW SPEED MIXTURE AD-
JUSTMENT.
• Blade continues to spin when en-
gine idles. See IDLE SPEED AD-
JUSTMENT.
• Engine dies or hesitates when it
should accelerate.
See ACCELERA-
TION CHECK.
• Loss of cutting power which cannot
be corrected by cleaning the air fil-
ter. See HIGH SPEED MIXTURE AD-
JUSTMENT.
• Engine will not run. See TROUBLE-
SHOOTING TABLE. Then, if the car-
buretor requires adjustment,
begin
with INITIAL SETTINGS.
ADJUSTING
PROCEDURE
CAUTION:
Do not force plastic limiter
caps on screws beyond the built-in
stops or damage will occur.
Low Speed
High Speed _/,_
Adjustment Screw
Adjustment __
Screw
--
Idle Speed
Adjustment Screw
Initial Settings
1. Turn both mixture screws (L and H)
counterclockwise
until they stop.
2. Turn the idle speed screw clock-
wise until it stops.
Now turn coun-
terclockwise
4/1/2 turns.
3. Start the engine.
Edge for 3 min-
utes to warm the engine, then pro-
ceed to adjust screws according to
the following instructions.
If engine
performance at initial settings is ac-
ceptable, no further adjustments
are necessary.
If engine does not
start, refer to the TROUBLESHOOT-
iNG TABLE. If still unable to remedy
situation, call 1-800-235-5878.
Idle Speed
Allow engine to idle. Adjust idle speed
screw until the engine runs without
stalling (idle too slow) and without the
blade shaft moving (idle too fast).
• Turn idle screw clockwise to in-
crease engine speed.
• Turn idle screw counterclockwise
decrease engine speed.
Low Speed Mixture - L
1. Allow engine to idle.
2. Turn the low speed mixture screw
(L) slowly clockwise until the speed
starts to drop.
3. Turn the low speed mixture screw
(L) counterclockwise
until speed in-
creases and then starts to drop
again.
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