Quote Originally Posted by yakuza
I think you might be on to something there, Ralph. Perhaps the petcock seal is decayed and gunked up, or a vent isn't working correctly?
Yep, that's where I was going with it. I figure that is the only thing changing and fixes the issue; that's an 11 year old fuel system, and it could probably stand to be replaced (fuel lines and petcock, gaskets, etc) by this point.