Husqvarna 543 XP Workshop Manual page 42

Repair Instructions
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
overspeed 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.
42
- English