Re: Carter Carb fuel leak

Posted by Gar On 2020/3/6 20:45:17

Seems to me that it could be a pressure issue & float issue.

The reasoning is that the float appears to work correctly after the car is started. If the gas is drained completely out of the float chamber, the float would be calling for full fuel flow. If the float is slightly misaligned it may be temporarily stuck at the bottom. After a large inrush of fuel, causing your overflow... the float could then pop back up off of the bottom of the full(overflowing)fuel bowl and stop the fuel flow.

If the pressure is too high (perhaps at 5 or 6 lbs) you could have the issue where the engine runs too rich which could also cause the carb to drip raw fuel into the carb throat (even when the engine is turned off) and cause it to start hard when the engine is hot as well as drain all of the fuel out of the fuel bowl.

An easy way to check this dripping issue, is to start the car and after the car engine and is hot, stop the car and remove the air cleaner. Look inside the carb throat and see if you see any smoke/mist coming out of the throat. IF you do, that is your answer.

Checking your spark plugs can also give you an indication of potentially too rich of a fuel mixture. I would also check your fuel pump to verify the fuel pressure and the carbs accelerator pump to ensure it is sealing/functioning correctly.

best of luck