i have a gms 61 that is almost new in my edge 540.
the engine starts right up,it idles great and revs just fine too.(11,500 with 12-6 nylon prop and bisson pitts exhaust).

the trouble i'm havin is the engine dies when i put the plane vertical on pre flight check.

this has happened only after it had 4 problem free flights and preflights.

is this a too rich problem or something else.

any help would be great.

thanx

mv-warbird