Husqvarna 120 Workshop Manual page 43

Adjustment
WARNING!
The guide bar, saw chain and
clutch cover must be fitted before
the chain saw is started, other-
wise the clutch may come loose
causing personal injury.
WARNING!
Wear ear defenders when making
adjustments with the engine run-
ning.
WARNING!
Do not use the chain saw until
it has been adjusted so that the
saw chain is still during idling.
NOTE!
For optimal setting, a tachometer should be
used. The recommended maximum over-
speed should not be exceeded.
NOTE!
If the saw chain turns when idling, the T-
screw should be turned anti-clockwise until
the saw chain stops.
Adjusting the carburettor involves adjusting the
engine to the local conditions e.g. climate, altitude,
fuel and type of 2-stroke oil.
The carburettor is equipped with three adjustment
options:
L = Low speed jet
H = High speed jet
T = Idling adjustment
The L- and H-jets adjust the fuel flow to match
the airflow that the throttle valve opening allows.
Turning them clockwise makes the fuel/air mixture
weaker (less fuel) and turning them counter-
clockwise makes the fuel/air mixture richer (more
fuel). A weaker mixture increases the engine speed
and a rich mixture decreases the engine speed.
The T- screw controls the throttle position when
idling. Turning the T-screw clockwise gives faster
idling, turning it counterclockwise gives lower idling
speed.
Run the chain saw for approx. 10 minutes before
adjusting the carburettor.
Basic factory setting
120: 967 06 79-01/967 06 79-02
H needle
L needle
125: 967 06 80-02
H needle
L needle
Fig 44
Repair Instructions
2 + 3/4 turns
2 turns
2 + 1/16 turns
2 + 1/8 turns
43
English -