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SERVICE AND ADJUSTMENTS
ADJUSTING PROCEDURE
IDLE SPEED ADJUSTMENT "T"
• Allow the warm engine to idle._
• Adjust the Idle Speed until the engine continues to run
without stalling and without the chain moving.,
- Turn clockwise to increase engine speed if engine
stalls or dies.
- Turn counterclockwise to slow engine down and/or to
keep the chain from turning.
• No furlher adjustments are necessary if chain does not
move at idle speed and ifperformance is satisfactory..
LOW SPEED MIXTURE ADJUSTMENT "U'
• Allow engine to idle.
° Turn the Low Speed Mixture Adjustment slowly clock-
wise until the RPM starts to drop,,Note the position_
• Turn the Low Speed Mixture Adjustment slowly counter-
clockwise untitthe RPM speeds up and starts to drop
again. Note the position.
• Set the Low Speed Mixture at the midpoint between the
two positions,.
HIGH SPEED MIXTURE ADJUSTMENT "H"
IMPORTANT: DO NOT OPERATE ENGINE AT FULL
THROTI'LE FOR PROLONGED PERIODS WHILE MAK-
ING HIGH SPEED ADJUSTMENTS AS DAMAGE TO THE
ENGINE CAN OCCUR,,
o Make a test cut°
° Based on performance of the saw while cutting, adjust
the high speed mixture in 1/16 turn increments as fol,
lows:
- Clockwise if saw loses power in the cut, Do not adjust
for best power by sound or speed, but judge by how
well the saw performs in the cut.
- Counterclockwise if the saw has speed while out of the
cut, but dies in the cut ot lacks power while cutting_
• Repeat the test cut.
• Continue with t/16 turn adjustments until the saw perfor-
mance isacceptable while cutting,_
= After completingadjustments, checkfor acceleration.
ACCELERATION CHECK
• If the engine dies or hesitates instead of accelerating,
turnthe Low Speed Mixture Adjustment 1/16 ofa turnat
a timecounterclockwiseuntilyou havesmoothacceletm
tiono
• Check the idle speed for stabilityand no chain move-
menL Adjust as necessary.
o Recheck for smooth acceleration and stable idle.Repeat
processas necessary for acceptable performances
28 -
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