Zenoah G3000 - Manual (Page 12)

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■ ADJUSTING CARBURETOR (OP9)
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.
If you have to make the adjustment yourself,
please carefully follow the procedure below.
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 farce. Then set them back
the standard number of turns as shown below.
H needle: 1 1 ⁄
4
± 1 ⁄
4
L needle: 1 1 ⁄
4
± 1 ⁄
4
2. Start engine and allow it a few minutes warming
up in low speed.
3. Turn L needle slowly clockwise to find the
position where idling speed is maximum, set the
needle back a quarter (1/4) turn
counterclockwise. L needle should be set in 1/4
turn either wise from the standard position.
4. Turn idle adjusting screw (T) counterclockwise
so 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.
NOTE
7. Operation
OP9