Husqvarna T425 Workshop Manual page 36

Repair instructions
Function
The carburettor functions differently in the following
modes:
Cold start mode
In cold start mode the choke valve (D) is com-
pletely shut. This increases the vacuum in the
carburettor and fuel is easier to suck from all the
diffuser jets (E, F and G). The throttle valve (H) is
partly open.
Idle mode
In idle mode the throttle valve (H) is shut. Air is
sucked in through an aperture in the throttle valve
and a small amount of fuel is supplied through the
diffuser jet (F).
Part throttle mode
In part throttle mode the throttle valve (H) is partly
open. Fuel is supplied through the diffuser jets (F
and G).
Full throttle mode
In full throttle mode both valves are open and fuel is
supplied through all three diffuser jets (E, F and G).
36
- English
Fig 33
Fig 34
Fig 35
Fig 36