MAINTENANCE AND CARE
T ; Idle adjusting screw
H ; High speed needle L ; Low speed needle
CARBURETTOR ADJUSTMENT
Every unit is run at the factory and the carburettor is set in compliance with California Emission Regulations. In addition, the carburettor is equipped with “H” (High Speed Needle) and “L” (Low Speed Needle) needle adjustment limited that prevent settings outside acceptable limits.
1.Before adjusting carburettor clean or replace air filter and muffler, “Spark Arrestor Screen”.
2.Make sure the cutting attachments such as bar and chain are properly adjusted.
3.Start engine and run several minutes to bring to operating temperature. Flash choke twice during
4.Stop engine.
Turn “H” speed needle CCW to stop.
Turn “L” speed needle midway between full CW stop and CCW stop.
5.Idle Speed Adjustment:
∙Start engine, turn “Idle” speed adjustment screw CW (clockwise) until the saw chain begins to turn, then turn screw out CCW (counter clockwise) until the saw chain stops turning.
Turn screw out, CCW, an additional 1/4 turn.
WARNING 
DANGER
CUTTING ATTACHMENT MUST NOT TURN OR MOVE WHEN UNIT IS IDLING.
6.Accelerate to full throttle for 2 - 3 seconds to clear any excess fuel in the engine, then return to idle.
Accelerate engine to full throttle to check for smooth transition from idle to high speed.
If engine hesitates turn “L” needle CCW 1/8 turn and repeat acceleration.
Continue adjustment until smooth acceleration results.
7.Check idle speed and reset if necessary as described in item 5. If a tachometer is available idle speed should be set as specified in the Instruction Manual.
CAUTION
When starting, idling adjustment speed should be adjusted not to rotate the saw chain. Correct idle speed is adjusted 2,900 to 3,100 r/min.
Or 1/4 turn counter clockwise from the point the chain stops moving.
When there is some trouble with the carburettor, refer to your distributor or dealer.
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