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Translation of original operating instructions
7.3.
Adjusting the carburetor
(1) Idle adjusting screw
(2) "L"-needle
(3) "H"-needle
If you have to make the adjustment yourself, please follow the procedure below
carefully:
Before adjusting the carburetor, make sure that the provided air/fuel filters are clean and
fresh and the fuel properly mixed.
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: -1/4
-
"L"-needle: -1/4
-
2. Start the engine and allow it to warm up in low speed for a few minutes.
3. Turn the idIe adjusting screw (T) counter- clockwise so that the saw chain does not
turn. If the idling speed is too slow, turn the screw clockwise.
Make a test cut and adjust the "H" needle for best cutting power, not for maximum speed.
NOTE: Over revolution of "H" needle causes a lack on power or a poor acceleration. In such
a case please turn the "H" needle a little counterclockwise.
7.4.
Carburetor anti-freeze mechanism
Operating chain saws in temperatures of 0 - 5"C 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 on the right side of the
surface of the cylinder 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 the normal operating mode, i.e,
in the mode 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
the anti-freeze mode before use. Continuing to use the product in the anti-freeze mode even
when temperatures have risen and returned to normal, may result in the engine failing to
start properly or in the engine failing to operate at its normal speed, and for this reason you
should always be sure to return the unit to the normal operating mode if there is no danger of
icing.
7.5.
Chain brake
This machine is equipped with an automatic brake to stop) saw chain rotation upon occur-
rence of kickback during saw cutting.
The brake is automatically operated by inertial force, which acts on the weight fitted inside
the front guard.
The carburetor has been adjusted at the factory.
Should your unit need readjustment due to the
changes in altitude or operating conditions, please let
your skillful dealer make the adjustment.
A wrong adjustment may cause damage to your unit.
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