Operating the engine – Zenoah GZ400 User Manual

Page 9

GZ400

GB-9

Push the choke knob to HALF CHOKE position.

Pull starter grip until engine runs.

Note: Allow the saw to run in this position 15~30 seconds, depending
upon the temperature.

Push the choke knob in to the RUN position.

Note: When restarting immediately after stopping the engine, set the
Choke knob in the HALF CHOKE position (choke open and throttle lever
in the starting position).

Keep clear of the saw chain as it will start
rotatIng upon starting of engine.

■ CHECKING THE OIL SUPPLY

Make sure to set up the bar and the chain when
checking the oil supply.
If not, the rotating parts may be exposed. It is very
dangerous.

After starting the engine, run the chain at medium speed
and see if chain oil is scattered off as shown in the fig-
ure.

Note: The oil tank should become nearly empty by the time fuel is used
up. Be sure to refill the oil tank every time when refueling the saw.

■ ADJUSTING THE CARBURETOR

The carburetor on your unit has been factory adjusted,
but may require fine tuning due to a change in operat-
ing conditions.
Before adjusting the carburetor, make sure that the pro-
vided air/fuel filters are clean and fresh and the fuel prop-
erly mixed.

When adjusting, take the following steps:

Note: Be sure to adjust the carburetor with the bar chain attached.

It is very dangerous to run a chainsaw that mounts
broken parts or lacks any parts.
Before starting engine, make sure that all the parts
including bar and chain are installed properly.

■ STARTING THE ENGINE

Fill fuel and chain oil tanks respectively, and tighten the
caps securely.

Set the switch to “I” position.

Continuously push the primer until fuel comes in the bulb.

Pull the choke knob all the way out to FULL CHOKE po-
sition.

While holding the saw unit securely on the ground, pull
the starter grip until the engine attempts to start, but no
more than 5 times.

Do not start the engine while the chain saw hangs
in one hand. The saw chain may touch your body.
This in very dangerous.

L needle

H needle

Idle adjusting
screw

5. Operating the Engine

Chain oil

Fuel

Chain oil

Switch

Throttle lever

Throttle
interlock

Primer

Choke knob
(FULL CHOKE

Position)

RUN
HALF CHOKE
FULL CHOKE