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8. Operating the Engine
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ADJUSTING THE CARBURETOR
(1) L needle
(2) H needle
(3) Idle adjusting screw
The carburetor on your unit has been factory
adjusted, but may require fine tuning due to a
change in operating conditions. Before adjusting the
carburetor, make sure that the provided air/fuel
filters are clean and fresh and the fuel properly
mixed.
When adjusting, take the following steps:
NOTE
Be sure to adjust the carburetor with the bar chain
attached.
1.
H and L needles are restricted within the
number of turn as shown below.
H needle:
L needle:
2.
Start the engine and allow it to warm up in low
speed for a few minutes.
3.
Turn
the
idle
counterclockwise so that the saw chain does
not turn. If the idling speed is too slow, turn
the screw clockwise.
4.
Make a test cut and adjust the H needle for
best cutting power, not for maximum speed.
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CHAIN BRAKE
This machine is equipped with an automatic brake to
stop saw chain rotation upon occurrence of kickback
during saw cutting. The brake is automatically
operated by inertial force, which acts on the weight
fitted inside the front guard.
This brake can also be operated manually with the
front guard turned down to the guide bar. To release
the brake, pull up the front guard toward the front
handle till a "click" sound is heard.
-1/4
-1/4
-1/4
-1/4
adjusting
screw
WARNING
Be sure to confirm brake operation during daily
inspection.
How to confirm:
1)
Turn off the engine.
2)
Holding the chain saw horizontally, release your
hand from the front handle, hit the tip of the
guide bar to a stump or a piece of wood, and
confirm brake operation. Operating level varies
by bar size.
In case the brake is not effective, ask our dealer for
(T)
inspection and repairs. If the engine keeps rotating at
high speed with the brake engaged, the clutch will
overheat causing trouble. When the brake engages
during operation, immediately release the throttle
lever to stop the engine.
STOPPING THE ENGINE
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1
Release the throttle lever to allow the engine to
idle for a few minutes.
2
Set the switch to the "O" (STOP) position.
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