Husqvarna 545RXT AT Workshop Manual page 30

Carburettor
In idling mode, the throttle valves (F) is closed and the
choke valve (E) is open. Air is sucked in through an
aperture in the throttle valve and a small amount of fuel is
supplied through the diffuser jet. See figure 3.
In part throttle mode, the throttle valve (See figure 4 pos.
F) is partly open and the choke valve (E) is fully open.
Fuel is supplied through the diffuser jets. The air throttle
valve (D) starts to open.
In the full throttle mode both valves (See fig. 5 pos. F and
E) are open and fuel is supplied through all diffuser jets.
The air throttle valve (D) is fully open.
30 – English
AV
F
Fig. 3
D
AV
F
Fig. 4
D
AV
F
Fig. 5
FUEL
AIR/FUEL MIX
AIR
E
FUEL
AIR/FUEL MIX
AIR
E
FUEL
AIR/FUEL MIX
AIR
E