Owner
’
s Manual
- 12 -
ADJUSTING CARBURETOR
The carburetor on your unit has been adjusted
by the factory, but may require
fine turning due to change in operating conditions.
Before adjusting the carburetor, make sure that provided are clean air/fuel
filters and fresh, properly mixed fuel.
When adjusting, take the following steps.
a. Stop engine and screw in both H and L
needles until they stop. Never force.
Then set them back the initial number
of turns as show below.
H needle
：
2+-1/8
L needle
：
2+-1/8
b. Start engine and allow it to warm up at
half-throttle.
c. Turn L needle slowly clockwise to find
a position where idling speed is
maximum, then set the needle back a
quarter (1/4) turn counterclockwise.
d. Turn idle adjusting screw (T) counterclockwise so that saw chain does not
turn. If idling speed is to slow, turn the screw clockwise.
e. Make a test cut and adjust the H needle for best cutting power, not for
maximum speed.
CHAIN BRAKE
To release brake, pull up the front guard toward
the front handle till “click” sound is heard.
(1) Break
(2) Released
(3) Operated
If the engine brakes in high speed, the clutch will be hot, and it can cause
damage to machine.
When it brakes during operation, release the throttle lever immediately to allow
the engine to idle.
（
2
）
( 1 )
（
3
）
1) Idle adjusting screw
2) H needle
3) L needle
