Keven,
You need to make sure you have the engine tuned correctly when you run it upside down. When you run the engine upside down you need to lean the low end a little until it will run and idle releably and have a good transition and then work on the high end. This is after you have checked all the normal things like tank location, clunk, fuel lines, loose bolts on engine, etc.
ORIGINAL: Keven
I have a new G51 on a Hanger 9 Twist. Engine has about a gallon through it and dies when I fly inverted. Runs great when I hold it inverted on the ground but dies in flight. I checked the clunk and it is moving freely. Any suggestions would be greatly appreciated.
Thanks,
Keven