Carter Carb fuel leak

Posted by jwblazek On 2020/3/4 11:42:29

Been having issues with the Carter carb on my 39 Six. Occurs only after the fuel bowl has been drained, either from me working on the fuel delivery system or the carb. I have an electric fuel pump mounted near the tank ( 4 - 5 PSI). As soon as I turn the key on, gas comes out of the top of the bowl and won't stop. After I mop up the gas and be prompt about hitting the starter button, engine starts immediately and I will not have the carb flooding issue again, unless the fuel bowl gets drained. I bought a carb rebuild kit and did a complete overhaul and measured and set float height. Same thing, gas out of the top until the engine is started then stops and will not occur again.

Ideas anyone? Very confusing

More history, added a glass sediment bowl in front of the carb and have a new fuel pump and inline filter next to it.

And a question about the carb. In the fuel bowl area, there is the accelerator pump, the long metering rod and an alloy piston that sits very loosely in a cylinder adjacent the metering rod. These three all are on the same linkage and interact with each other. I understand the fuel pump and metering rod, but what is the piston, similar to more modern day carb power valve?