are clean air/fuel filters and fresh, properly mixed fuel. When adjusting, take the following
steps:
Be sure to adjust the carburetor with the bar chain attached
1.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 shown below.
H needle: 13/8
L needle: 11/4
2. Start engine and allow it to warm up at half-throttle.
3. 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.
4. Turn idle adjusting screw (T) counterclockwise to that saw chain does not turn. If idling
speed is too slow, turn the screw clockwise.
5. Make a test cut and adjust the H needle for best cutting power, not for maximum speed.
(1) L needle
(2) H needle
(3) Idle adjusting screw
CARBURETOR ANTI-FREEZE MECHANISM
Operating the chain saw in temperatures of 0-50C at times of high humidity may result in
ice forming within the carburetor, and this in turn may cause the output power of the
engine to be reduced or for the engine to fail to operate smoothly. This product has
accordingly been designed with a ventilation hatch the back of the air cleaner cover to
allow warm air to be supplied to the engine and to thereby prevent icing from occurring.
Under normal circumstances the product should be used in normal operating mode, i.e., in
the mode to which it is set at the time of shipment. However when the possibility exists that
icing may occur, the unit should be set to operate in anti-freeze mode before use.(F15)
HOW TO SWITCH BETWEEN OPERATING MODES (F15)
1. Flip the engine switch to turn off the engine.
2. Remove the' air cleaner cover from the cylinder cover
3. Loosen a screw and remove the screen on the back of the air cleaner cover.
4. Reattach the screen right side left so as to the anti-icing plate is on the right. Reinstall
the cover.
(1) Air cleaner cover
(2) Anti-icing plate
(3) Screw
(4) Normal operating mode
(5) Anti-freeze mode
(6) Screen
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