I don't get it, before my carb rebuild my gas was disappearing from the float bowl and really thought that rebuilding it would cure this problem. I was maticulious in cleaning, soaked in carb dip for a few days, dipped in mineral spirits 3 times blowing with compressed air numerous times. So where could it be going? Does't appear to be leaking out the jet access bolts, doesn't appear to be leaking out the sight glass, so that only leaves draining out the jets them selves or the power valve. But how could it be possible it's going up hill to drain out a venturi? I'm positive my vent tubes are clear, so I don't see how any pressure could be building up. That much gas couldn't evaporate in 24hrs could it?