Zenoah G3801EZ owner manual Stopping The Engine, Carburetor anti-freeze mechanism

1.Stop engine and screw L needle until it stops. Never force. Then set it back the initial number of turns as shown below. H needle is restricted within the num- ber of turn as shown below.

Hneedle : 13/8 ± 1/4 L needle : 11/4 ± 1/4

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

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 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.

5.Make a test cut and adjust the H needle for best cutting power, not for maximum speed.

■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.

Switch

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 ventila- tion 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 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. Please switch between modes in the repair specialty store.

Normal operating mode Anti-freeze mode

Cylinder cover

G3801/G3801EZ

■HOW TO SWITCH BETWEEN OPERATING MODES

1.Set the switch to the “O” position to stop the engine.

2.Remove the air cleaner cover, remove the air filter, and then remove the choke knob from the cylinder cover.

3.Loosen the screws holding the cylinder cover in

place (i.e., the three screws on the inside and the	G
one screw on the outside of the cover), and then	B
remove the cylinder cover.

4.Press with your finger down on the icing cap located on the right-hand side of the cylinder cover to re- move the icing cap.

5.Adjust the icing cap so that the ‘snow’ mark faces upwards and then return it to its original position in the cylinder cover.

6.Fix the cylinder cover back into its original position, and then fix all other parts back into their proper positions.

Choke knob

Cylinder cover

Icing cap

“Sunshine” mark “Snow” mark

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 occurring.

GB-9