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8. Operating the engine
English
■
ADJUSTING THE CARBURETOR (F14)
The carburetor on your unit has been factory adjusted,
but may require fine tuning due to a change in
operating conditions.
Before adjusting the carburetor, make sure that the
provided air/fuel filters are clean and fresh and the fuel
properly mixed.
When adjusting, take the following steps:
(1) L needle
(2) H needle
(3) Idle adjusting screw
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 ±
1
/
4
L needle 1
1
/
2
±
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 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 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.
NOTE
F14
