I think maybe you guys have possibly gotten a little off track here. The fact that the engine is inverted isn't causing Ross8236's problem , it's the height of the fuel tank vs. the carb.
No: Iam not off track here. I understand what his problem is. LOL
I was just stating I HAVE never had that problem. [:@]
The first thing that came to my mind was bad kit/arf
design. Again all i build is Sig kits and maybe thats why i have never
had that problem. LOL