This may be an old question but what do you guys do when the engine is mounted inverted in the U-Can D0-3D. I have an OS Max .91FX installed in my airplane. The engine drips fuel like crazy from the carburetor and the engine does not run that well with the engine at full speed. If I take the engine out and mount it on a test stand right side up, it runs great. I realize that the fuel tank is much higher than the carburetor when the engine is inverted. I have tried using a Perry oscillating pump but the engine still does not run reliably and the engine quits if it idles very long due to the excess fuel again dripping out the carburetor. I know that the designated tank location is high due to channel under the tank allowing the air to flow past the engine. Why did Great Planes have to set this up so high and why has it still remained on the market. All inverted engines should have this problem. I have cussed this engine out many times and now I feel that it is due entirely to the tank being so high.

Please tell me how you remedied this problem. Would another type of pump remedy this? I quit flying it last year but I tried to fly it again yesterday and I realize again why I quit flying it. Maybe the solution it to just get rid of the airplane and replace it with an airplane with the fuel tank located lower.