Update: trying to get this resolved. I filled the bowls with gasoline and added a small amount of gasoline dye. Set the carb on the bench and the fuel slowly (over days) drops below the sight glass. But, there is absolutely no dye on the white paper sitting under the carb! The gas is simply vanishing! I started to question the types of fuel used in our cars and came across several sources indicating that 10% ethanol fuel (E10) is more volatile than non-ethanol fuels. Makes sense as there is alcohol in it which is obviously more volatile than gasoline. In one source I read that switching to non-ethanol fuel actually cured the disappearing gasoline problem. Finally, the disappearing gasoline problem is "faster" when the carb is left on the car during cool down. I assume the engine heat accelerates the evaporation process. Is it possible that E10 fuel would evaporate through the bowl vents to create this problem? Anyone experienced this? In a round about way, to test E10 volatility I artificially plugged the bowl vents and within about ten minutes fuel begins to leak past the throttle blades. This indicates within 10 minutes pressure builds enough to cause a leak. I'm running E10!
I never said it was quiet I also do not think it has anything to do with the type of gas you are running
