I just rebuilt a Rochester model B carburetor, everything seemed to be OK at first. I soaked it for a day and flused and blew everything out before I put the kit in. After it ran for about fifteen minutes I adjusted the idle adjusting needle valve. I adjusted it all the way in and it still never made a difference as to how the engine ran. Than I noticed gas running out of the acclerator pump housing. I shut the engine off and could not get any stream of gas when I activated the pump by hand. I took off the Air Horn and the fuel bowl was full with gas to the top of the float bowl.
While rebuilding the carburetor I noticed that the new spring which went between the power valve ball and the power valve plug was tapered at both ends. The old spring was not. Maybe it is not in correctly.
I would appreciate input from anyone with an idea. The float adjustment is perfect but the fuel keeps running into the bowl.

Thank You