[PowerPro]

I had a similar issue on my 472. the fuel line was too close to the exhaust and it was heating up the fuel in the line to the vapor point. I know, this is a red-neck fix, but... it worked. I wrapped the fuel line near the exhaust with aluminum foil in several layers. I also wrapped the line coming from the mech fuel pump up to the carb. No more issues!!!

The way i figured it out was that I felt my fuel lines and they were overly hot to the touch. I also saw inside my glass fuel filter that it looked like it was almost boiling the fuel off in there - maybe the pressure differential in the fuel filter allowed it to boil off or something. It was a sight to see, that's for sure. I'm betting if i put the fuel filter prior to the pump that would work to fix the issue too... sorry, i'm rambling. I learn a lot from other people's situations and try to apply it to my own. Thanks for dealing with my rambling.

On an old Rx-7 i had, when the ignition coil got hot, it would do that... When cold, the wires inside would touch, but a wire was cracked and separated when warm... 12 dollar part.

there's 2 things to check, i guess.