I don't have a cold start or even a warm start problem. Only when the engine is shut off at full operating temp. The under hood heat vaporizes the fuel, creating pressure that can push by the needle/seat and flood the carb after 10 minutes or so. I can crack the line at the carb immediately after shut down and fuel just drips as it should. Crack the line after 10 minutes and gas squirts out under pressure. I'm simply trying to relieve that pressure, therefore eliminate the flooded situation.
I have never experienced this with my old 51 216 or 56 235 or 59 235 or 57 261. But then, they were before ethanol fuel, which evaporates a lot quicker than "regular old gasoline."
ps... The nearest non ethanol gas is 25 miles away.
If this hack works it will only cost me 2 bucks out of pocket.
