worntorn said:
That'll likely be caused by the float sticking. Burlen (Amal) has replacement floats in a stay-up type plus Viton float needles, should solve the problem.
Glen
Glen has given you good advice. That said, the cause may be as simple as debris caught between the float needle and its seat. With the petcock open, try tapping [horizontally] on the affected float bowl with a plastic or rubber mallet. The vibration often will help clear debris stuck in the seat. If this proves to correct the issue, it's time to pull your inlet banjos, to clean the filters. I would also suggest pulling the petcocks at minimum or the fuel tank to clean out whatever debris is in the tank.
