Husqvarna K1270 II Workshop Manual page 35

If the air purge bulb does not fill with fuel when you push
it, do this procedure.
1. Connect the test instrument to the hose from the air
purge bulb.
2. Set the test instrument for vacuum test.
3. Push the air purge bulb to increase the pressure to
0.3–0.5 bar.
If the pressure can be increased to 0.3–0.5 bar, the air
purge bulb and hose connection are not damaged. Then
it is necessary to look for faults in the other components
of the fuel system.
1273 - 001 - 04.11.2019
6.5.11 To remove the air purge bulb
1. Remove the return hose and carburetor hose from
the air purge bulb.
2. Push the snap lock with pliers and push the air
purge bulb out.
Repair and servicing - 35