I'm having a problem with a new G26 on an Ultra Stick Lite. Both are brand new and flew for the first time today, however the engine didn't run good in the air. It loses power and actually died twice in the air. In level flight or descending it runs bad, climbing it picks up power. On the ground it runs like a champ. 7500rpm with a 16x10 prop and idles good. After the second dead stick landing, the fuel line was full of fuel without any air bubbles. The engine started on the third flip and ran like a champ again. There is the black oily "slim" on the bottom of the fuselage.

I did a search on RCU and am getting the impression that the engine may be running a little rich. Does this sound like the problem? If so, which screw do I adjust? The engine goes from idle to full throttle without any hesitation. Before doing the search, I tried richening up the high speed needle slightly, and it made the problem in the air worse. Also the rpm's dropped down a couple of hundred rpm on the ground. The velocity stack that came with the engine is installed.

Any comments would be appreciated.