I've replaced my old engine on my aircore 40 with a GMS .47 but I'm having the darndest time getting thing to stay running.

I put everything in new; new fuel lines, new fuel tank. I have already broken in the engine and I have no trouble starting the engine but the engine will quit every so often (I haven't flown with the new engine yet). It seems like that whenever I go from idle to full throttle the engine will kinda stutter for a minute and then it will pick up speed and go the faster RPM. I've switched out the glow plug with a new one and that really didn't seem to help.

One thing I've noticed is that when I've got her stationary she doesn't do this...its only when I start taxiing that I have this problem. I'm guessing that something in the fuel line/fuel tank setup has a leak and when she gets to taxiing and shaking around that it exposes the leak and makes the engine quit. That's just a guess...anyone have any suggestions?

Thanks