Craftsman 358.351040 Operator's Manual page 23

SERVICE AND ADJUSTMENTS
CARBURETOR ADJUSTMENTS
Carburetor adjustment Is critical and If done Improperly can permanently damage the engine as well as the
carburetor. Please read all Instructions and consult the Troubleshooting section of this manual before
beginning this process. If the engine does not operate according to these Instructions after repeating the
adjusting steps, do not use the unit. For further 8ssistsnca, please call our customer aselstsnca hotllne at
1-800-235-5878.
If engine does not start, it may be flooded. If in doubt,
read the section on flooded engine in the starting sec-
tion of this manual prior to beginning any adjustments.
The carburetor has been adjusted at the factory for sea
level conditions.Adjustments may become necessary if
the saw is used at significantlyhigher altitudesor if you
notice any of the following conditions:
• Chain moves when the engine runs at idle speed. See
"Idle Speed Adjustment."
• Saw will not idle. See =Idle Speed Adjustment"and
=Low SpeedMixture Adjustment;
• Engine dies or hesitates when it should accelerate.
See "Acceleration Adjustment."
• Loss of cutting power which is not correctedby air til-
ter cleaning. See "High Speed Mixture Adjustment."
NOTE: There are three adjustments on the carburetor.
• The Idle Speed Adjustment is marked with the letter
• The two remaining adjustments on the carburetor
are the mixture adjustments. One is marked =L"for
low speed, and the other "H"for high speed.
A
WARNING:
THE CHAIN WILL BE MOVING DURING
MOST OF THIS PROCEDURE. WEAR
YOUR PROTECTIVE EQUIPMENT AND
OBSERVE ALL SAFETY PRECAUTIONS.
IN "LOW SPEED MIXTURE ADJUST-
MENT;' RECHECK IDLE SPEED AFTER
EACH ADJUSTMENT.THE CHAIN MUST
NOT MOVE AT IDLE SPEED,
CARBURETOR PRESETS (Fig. 50)
If your engine will not start due to suspected improper
carburetor adjustment, the following presets may be re-
quirad. If used, it is recommended that all steps within
the adjustment procedure be completed in order to
assure a properlyset carburetor. If presets are not need-
ed, proceed to section "Idle Speed Adjustment."
When making adjustments, be careful not to force the
plastic limiter caps beyond the stops or damage will
OCCUr.
Very small adjustments can affect engine performance.
It is important to make slight adjustments and test per-
formance before proceeding. Each adjustment should
be no more than 1/16 of a rum.
• Turn bothof the mixture adjustments countemlock-
wise untilthey stop.
• Turn the idle speed adjustment clockwise until it
stops. Now turn countemlockwise 4-1/2 turns.
• If engine fails to start after performing carburetor pre-
sets, the unit may be flooded. Review the "Difficult
Starting"section of the manual. If problems continue
call the 1-800 number listed on the front cover of this
manual for further assistance.
• Start the engine and operate for three (3) minutes to
warm up.Go to "AdjustingProcedure."
Figure 50
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