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SERVICE AND ADJUSTMENTS
ADJUSTING PROCEDURE HIGH SPEED MIXTURE ADJUSTMENT "H"
IDLE SPEED ADJUSTMENT "T"
o Allow the warm engine to idle_
= Adjust the Idle Speed until the engine continues to run
without stalling and without the chain moving,
-Tum clockwise to increase engine speed ff engine
stalls or dieSr
- Turn counterclockwise to slow engine down and/or
to keep the chain from turning,,
= No further adjustments are necessary if chain does
not move at idlespeed and if performance is satisfac-
tory,
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 coun-
terclockwise until the RPM speeds up and starts to
drop again,, Note the position,
, Set the Low Speed Mixture at the midpoint between
the two positions,
IMPORTANT: DO NOT OPERATE ENGINE AT FULL
THROTTLE FOR PROLONGED PERIODS WHILE
MAKING 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 in 1/16 turn increments as fol-
lows:
- Clockwise if saw smokes or loses power in the cut,
Do not adjust for best power by sound or speed, but
judge by how welt the saw performs in the cut.
- Counterclockwise if the saw has speed while out of
the cut, but dies in the cut or lacks power while cut-
ting,
• Repeat the test cuL
, Continue with 1/16 turn adjustments until the saw per-
formance is acceptable while cutting_
• After completing adjustments, check for acceleration.
ACCELERATION CHECK
• tfthe engine dies or hesitates instead of accelerating,
turn the Low Speed Mixture Adjustment 1/16 of a turn
at a time counterclockwise until you have smooth
acceleration.
= Check the idle speed for stability and no chain move-
ment, Adjust as necessary,
• Recheck for smooth acceleration and stable idle
Repeat process as necessary for acceptable perfor-
mance
-24-
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