Jonsered CS 2166 Workshop Manual page 32

Adjustment
!
WARNING!
The guide bar, chain and clutch cover
must be fitted before the saw is star-
ted, otherwise the clutch may come
loose causing personal injury.
!
WARNING!
Wear ear defenders when making ad-
justments with the motor running.
!
WARNING!
Do not use the saw until it has been
adjusted so that the chain is still.
NOTE!
For optimal setting, a tachometer should be
used. The recommended maximum overspeed
should not be exceeded.
NOTE! If the chain turns when idling, the
T-screw should be turned anti-clockwise until
the chain stops.
Adjusting the carburettor involves adjusting the motor 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 clock-
wise makes the fuel/air mixture weaker (less fuel) and
turning them anti-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 anti-clockwise lower idling speed.
32 – English
CARBURETTOR
T
L
H