Idle Speed Adjustment; Low Speed Mixture Adjustment; High Speed Mixture Adjustment; Acceleration Check - Craftsman 358.356242 Operator's Manual

SERVICE AND ADJUSTMEN'FS
.......... PROC,:'DuR,: .............................................
ADJUSTING .....
_ cAuTION: A CARBURETORSETTING
THATIS Too LEAN(CLOCKWISE
IDLE SPEED ADJUSTMENT '
• Allow the warm engine to idle,
• AdjusttheldteSpeedScrewuntiltheenginecontinues
to run without stallingand withoutthe chain moving.
-Turn screw clockwise to increase engine speed if
engine stalls or dies
-Turn screwcounterclockwise to slowengine down
and/or to keep the chain from turning
• No further adjustmentsare necessary if chaindoes not
move at idle speed and if performance is satisfactory
LOW SPEED MIXTURE ADJUSTMENT
• Allow engine to idle.
• Turn the Low Speed Mixture Screw slowlyclockwise
until the:RPM starts to drop. Note the position.
• Turn the:iLbWSpeed Mixture Screw slowly counter-
clockwise_ntil the RPM speeds up and starts to drop
again. NSte the position,
• Set the Low Speed MixtUre Screw at the midpoint be*
tween the two positions.
ADJUSTMENT ON HIGH SPEED SCREW
FOR MAXIMUM SPEED) WILL CAUSE
ENGINE DAMAGE TO ANY 2-CYCLE
ENGINE FROM OVERHEATING AND LACK
OF LUBRICATION. NEVER SET THE HIGH:
SPEED SCREW SO FAR CLOCKWISE
THAT YOU HAVE HIGH ENGINE SPEED
LACKING POWER TO CUT. AN EFFECTIVE
APPROACH FOLLOWS.
-TURN HIGH SPEED SCREW COUN-
TERCLOCKWISE UNTIL ENGINE
LOSES POWER WHILE CUTTING,
-TURN HIGH SPEED SCREW CLOCK-
WISE USING 1/16! TURN INCRE-
MENTS ONLY UNTIL THE ENGINE
HAS POWER WHILE CLrI"TING;
HiGH SPEED MIXTURE ADJUSTMENT
IMPORTANT: DO NOT OPERATE ENGINE AT FULL
THRO'I-FLE FOR PROLONGED PERIODS WHILE MAK-
ING HIGH SPEED ADJUSTMENTS AS DAMAGE TO
THE ENGINE CAN OCCUR.
• Make a test cut.
•. Based on performance of the saw while cutting,adjust
the high speed mixture screw in 1/16 turn increments
as follows:
-Clockwise ff saw smokes or loses power in the cut
Do not adjust for best power by sound or speed,
but judge by how weft the saw performs in the
cut
-Oounterclockwise ff the sa whas speed whileout of
the cut, but dies in the cut or lacks power while
cutting
• Repeat the test cut
• Continue with 1/16 turn adjustments until the saw per-
formanc_s acceptable while cutting.
• Aftercotnpletingadjustments, checkforacceleration
ACCELERATION CHECK
• If the engine dies or hesitates instead of accelerating,
turn the Low Speed Mixture Screw 1/16 of a turn at a
timecounterclockwise untilyou have smoothaccelera-
tion.
• Check the idte speed for stability and no chain move-
ment. Adjust as necessary.
• Recheck for smoeth acceleration and stable idle. Re-
peat process as necessary for acceptable perfor-
mance
IF THE ENGINE DOES NOT OPERATE
ACCORDING .TO THESE INSTRUCTIONS
AFTER REPEATING THE ADJUSTING
STEPS, DO NOT USE THE UNIT. FOR
FURTHER ASSISTANCE, PLEASE CALL;
OUR CUSTOMER ASSISTANCE HOTLINE
AT 1-800-235"5878.
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