Physically Impossible

boils out of a carter on a cast iron intake. Every morning my electric carter pump would run load free for about 4-5 seconds. If I tried to start it without the pump on it would run for about 5 seconds and then sputter and die. Fuel was going somewhere and on a carter it can only evaporate. My Nikki 2bbl with clear sight glass will hold fuel for about a week at the level mark. The facet style 'jiggler' electric pump fills it and there is a tap with a check valve that sends the fuel back when the bowl is full. Todays fuel will evaporate and leave a white jello like crap. Lawnmowers are notorious for getting their bottom bowl jets clogged with this crap.