Husqvarna 331RB Workshop Manual page 17

and down with the throttle valve and adjusts the fuel
flow.
The throttle valve has 3 different positions:
• Idle position
• Part throttle position
• High speed position
7.6.3.1 Idle position
1281 - 001 -
7.6.3.2 Part throttle position
7.6.3.3 High speed position
7.6.4 Gravity fuel supply
The fuel tank is installed above the carburetor. Gravity
causes the fuel to go from the fuel tank to the
carburetor. The fuel valve (B) is installed between the
fuel tank and the carburetor and stops the fuel. The
gravity fuel supply limits the product from tilted
Repair instructions - 17