[patrickt]

On second thought, pull the bowls off and inspect what it looks like in there and see if you have gobs of white crap peeling off the metering block. If so, replace it. If you have something that's making your needle/seat stick open, you have to at least look for what it might be. A stuck N/S can be a potential fire hazard. In my gallery I have pics of some of my metering blocks that the ethanol gas just ate to pieces, while other blocks seemed immune to ethanol.