The Stovebolt Site Forums The Shop Area Engine Shop Rochester 1bbl leaks at the Accelerator pump shaft

I guess after is sits for a month or so the leather in the accelerator pump must dry up and then it leaks. It worked fine when I first put it all together but now it leaks no matter what. Any ideas on how to keep it from leaking. Is there a better accelerator pump with maybe a rubber seal or something?

Leakage around the accelerator pump shaft is a function of the fuel level being too high in the bowl; not a failure of the accelerator pump.

Often, when modern fuel evaporates, it leaves a gummy residue. This can cause the float to stick and the fuel level to be too high in the bowl when the engine is started after prolonged non-running.

Generally, filling the fuel bowl through the bowl vent, and allowing the carb to sit a few minutes, will allow the fresh fuel to dissolve most of the glue.

The solution: start the vehicle more often.

Chances are the situation has corrected itself by now. Try it.

And to answer your other question, leather is far superior to any current synthetic for accelerator pump material.

Jon.

Jon, Thanks for the info. I'll check it tomorrow and see if I can get it going per your directions. I'm also glad to hear the leather is a good thing and I won't have to tear the carb apart. THANK YOU big time!