Carter AFB FUEL LEAK BY THROTTLE SHAFT(S)

I Rebuilt the stock Carter AFB carb on my 67 GTX 1 year ago. I noticed small leakage from throttle shaft. My complaint today is fuel dripping out of the throttle body by the throttle shaft again AFTER the engine is switched off. I still have Difficultly in starting the vehicle when it sits for a number of days , it then will start well the rest of the day. I would like to stop excessive wear on the starter..Is anybody else running into this same problem.. Or do I just have to live with this...

Pops1967GTX said:

I Rebuilt the stock Carter AFB carb on my 67 GTX 1 year ago. I noticed small leakage from throttle shaft. My complaint today is fuel dripping out of the throttle body by the throttle shaft again AFTER the engine is switched off. I still have Difficultly in starting the vehicle when it sits for a number of days , it then will start well the rest of the day. I would like to stop excessive wear on the starter..Is anybody else running into this same problem.. Or do I just have to live with this...

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I can't help you with the leak but I can with the other problem. I have that problem with both my AFB carbs in my Barracudas, and the AVS in my Roadrunner. That happens because of the garbage ethanol they add to the gas. When the car sits without running for a few days most of the gas evaporates out of the carb. So then you have to crank it over longer while enough gas is pumped back into the carb for the engine to run. There are some who have suggested that you install an electric fuel pump to avoid the long cranking to pump the gas up to the carb. So unless they take the ethanol out of the gas, or you add the electric pump, I guess we'll have to live with it.

generally fuel seeping thru the thottle shafts is fuel on the top side of the butterflys. this excess fuel can be from excessive pumping the accelerator, floats too high spilling over the boosters, excessive fuel pressure, or fuel percolating in the carb and spilling out thru the boosters. my guess would be fuel percolation.

You need to check your floats. It sounds like one of them is full of gas loading it down. In turn draining the carb at shut down. If you can soldier its an easy fix. Just melt some of the old soldier where the leak is. Drain the float and re- soldier.

YES.floats too high causing it to blow thru the needle and seats and coming out of your shafts.

If your car runs fine (not excessively rich) then your floats and float level is probably OK. The hard starting is most likely due to the fuel issues mentioned above. Crap gas and a hot carb when you shut the engine down can cause the fuel to expand and dribble out the main discharge tubes. The leakage issue, which sounds like more than a slight weep, is due to excessively worn throttle shafts. If the clearance between the carb body and shaft is reasonably tight not much fuel gets through.