Carburetor Adjustments - Craftsman 358.352161 Operator's Manual

SERVICE AND ADJUSTMENTS
CARBURETOR ADJUSTMENTS
Carburetor adjustment is critical and if done improper-
ly can permanently damage the engine aswell as the
carburetor. Please read all instructions and consult the
Trouble Shooting section of this manual before'begin-
ning this process. If the engine does not operate
according to these instructions after repeating the
adjusting steps, do not use the unit. For further assis-
tance, please call our customer assistance hotline at
1-800-235-5878.
CARBURETOR PRESETS (Fig, 49)
If your engine will not start due to, suspected improper car-
buretor adjustment, the following presets may be required.
If used, it is recommended that all steps within the adjust-
ment procedure be completed in order to assure a properly
set carburetor. If presets are not needed, proceed to sec-
tion "Idle Speed Adjustment."
When making adjustments, be careful not to force the plas-
tic Iimiter caps beyond the stops or damage will occur.
WARNING:
THE CHAIN WILL BE MOVING DURING
MOST OF THIS PROCEDURE. WEAR YOUR
PROTECTIVE EQUIPMENT AND OBSERVE
ALL SAFETY PRECAUTIONS.
IN "LOW SPEED MIXTURE ADJUSTMENT;'
RECHECK IDLE SPEED AFTER EACH
ADJUSTMENT. THE CHAIN MUST NOT
MOVE AT IDLE SPEED.
If engine does not start, it may be flooded. If in doubt, read
• the section on flooded engineJn the starting section 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 significantly higher altitudes or if you notice
any of the following conditions:
° Chain moves when the engine runs at idle speed. See
"Idle Speed Adjustment."
- Saw will not idte. See "Idle Speed Adjustment" and "Low
Speed Mixture Adjustment."
• Engine dies or hesitates when it should accelerate. See
"Acceleration Adjustment."
• Loss of cutting power which is not corrected by air _ter
cleaning. See "High Speed Mixture Adjustment."
NOTE: There are three adjustments on tl_e carburetor.
• The idle Speed Adjustment is marked with the letter"T:'
• 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.
Very small adjustments can affect engine performance. It is
important to make slight adjustments and test performance
before proceeding. Each adjustment should be no more
than 1/16 of a turn.
• Turn both of the mixture adjustments clockwise until
o_,they stop,,Do;noL.Qvertighten as damage to the needles
wilt occur.
• .Turn beth mixtureadjustments €0unterclockwise one full
turn.
• Turn the idle speed adjustment clockwise until it stops.
Now turn counterclockwise 4-1/2 turns.
• If engine fails to start afterperforming carburetor presets/_ ....
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 "Adjusting Procedure."
Idle Speed Adjustment
Low Speed
Mixture
Adj
Figure 49
Higt
Mixture-.
Adjustment
-25 :