Re: 1929 640 fuel running out of the carburetor

Posted by Tim Cole On 2011/3/3 18:16:10

Dear Hank:

Okay, so the vacuum tank is being used as the fuel supply device and the carburetor has gas pouring out of it.

a) I assume the choke butterfly is open.
b) Remove the nut on top of the float bowl which covers/exposes the float needle shaft.
c) Pull up on the shaft and release. There should be no interference of movement.
d) Using your index finger lightly apply downward pressure on the shaft to close the needle seat. If the flooding stops this verifies the cause as being in the float chamber.
e) Remove the float cover and float,
f) Shake the float. It should not contain any liquid.
g) If the float is dry inside it should float in water and if it does then check for dirt/sealer in the needle seat, a loose seat, a damaged needle, or a needle set too high.

Sometimes the needle and seat are just plain shot and that is a difficult problem. Other times the float is rubbing on the carburetor body which is a very elusive.

There is an outfit in Arizona which can repair your carburetor.

That you claim you have a known good carburetor that does the same thing indicates that the choke butterfly is closed.

Good luck