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14
CLEANING SILENCER AND
EXHAUST PORT
(Check Periodically)
1. Carefully remove housing halves.
2. Remove and disassemble silencer.
NOTE
Be careful not to scratch the cylinder or
piston when cleaning the cylinder exhaust
port.
3. Clean deposits from cylinder exhaust port
and silencer.
ADJUSTING CARBURETTOR
(As Required)
GENERAL INFORMATION
The idle speed adjuster screw controls the
throttle opening at the idle position.
IDLE ADJUSTMENT
1. Start engine and allow it to run at high idle
until warm.
2. Turn the idle speed screw clockwise until
drill begins to move.
3. Turn idle screw counter-clockwise 1 and 1/
2 to 2 turn or until the drill stops (2,700 to
3,300 r/min).
CLEANING CYLINDER FINS
(Check Periodically)
NOTE
Clogged fins will cause poor engine cooling.
1. Carefully remove housing and clean dirt
and dust from fins.
2. Reinstall housing.
Low Speed Needle (L)
Idle Speed Adjustment Screw