Basic Carburetor Settings - Craftsman 358.797750 Operator's Manual

stand allwarnings and instructions, let
your A uthorized Service Dealer per-
form these adjustments.
WARNING: Serious injury to the op-
erator and others can occur if the car-
buretor is not property adjusted. Keep
others away when making carburetor
adjustments. The blade shaft wil! be
spinning during most of this proc_'.__
Wear your protective equipment _:
observe all safety instructions.
Remove blade before making carbure-
tor adjustments. Do not make adjust-
ments 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 re-
suit of other causes such as dirty air
filter, carbon build-up on muffler out-
lets, etc. See "Troubleshooting
Chart" before proceeding with carbu-
retor adjustments.
• For best results, it is recommended
that you have your Sears Service
Center make all carburetor adjust-
ments. Your dealer has the training,
experience, and tools necessary to
properly adjust your unit to meet our
factory performance specifications.
This service is not covered by war-
ranty. If it becomes necessary for
you to make carburetor adjustments
yourself, follow the described proce-
dures 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.
TROUBLESHOOTING
SUGGESTIONS
° 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 engine
idles. See "Idle Speed Adjustment."
• Engine dies or hesitates when it
should accelerate. See =Acceleration
Check."
• Loss of cutting power which cannot
be corrected by cleaning the air filter.
See "High Speed Mixture Adjust-
ment."
• Engine will not run. See
"Troubleshooting Chart." Then, if the
carburetor requires adjustment, be-
gin with "Basic carburetor Settings."
BASIC CARBURETOR SETrlNGS
NOTE: Usually, your engine can be
made to run properly with minor carbu-
retor adjustments. Refer to
"Troubleshooting Suggestions" in the
left column for the condition you are
experiencing and follow the instruc-
tions. The basic carburetor settings are
provided below.
• Turn the low speed mixture screw
and the high speed mixture screw
fully counterclockwise. Do not at-
tempt to turn screws beyond the stops
as damage can occur.
High Speed __ Low Speed
Screw _.
Idle Speed
Adjustment Screw
Screws with
LimiterCaps
H L
ADJUSTING PROCEDURE
PREPARATION
• Use fresh fuel mix. See Fueling Your
Engine.
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