Zenoah G500AVS Chain Brake, How to confirm, Stopping The Engine, Carburetor anti-freezemechanism

G455AVS / G500AVS

1.H and L needles are restricted within the number of turn as shown below.

	G455AVS	G500AVS
H needle :	-1/4	-1/4
L needle :	-1/4	-1/4

2.Start the engine and allow it to warm up in low speed for a few minutes.

3.Turn the idle adjusting screw (T) 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.

■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.

[Caution]

Be sure to confirm brake operation during daily inspec- tion.

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 op- eration. Operating level varies by bar size.

In case the brake is not effective, ask our dealer for 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.

GB-10

■STOPPING THE ENGINE

1.Release the throttle lever to allow the engine to idle for a few minutes.

2.Set the switch to the “O” (STOP) position.

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 car- buretor, and this in turn may cause the output power of the engine to be reduced or for the engine to fail to op- erate smoothly.

This product has accordingly been designed with a ven- tilation hatch on the right side of the surface of the cylin- der 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 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 the anti-freeze mode before use.

(1)	Air cleaner cover	(4)	Normal operating mode
(2)	Shutter plate	(5) Anti-freeze mode
(3)	Screw	(6)	Screen

WARNING

•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 prop- erly 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 occurring.

■HOW TO SWITCH BETWEEN OPERATING MODES

Snow protector

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.Turn the screen a half and reinstall to the cover.

When using the saw with the anti-freeze mode, frequently check the screen and keep it clean of saw dust.

NOTE

When using the unit at times when it is snowing. Zenoah recommends that you also use a snow protector effec- tive in preventing the air filter from freezing (e.g., the separately-sold Z2881-98610 snow protector).