BMW,

FLYBOY is absolutely correct. I was joking about getting a new engine. I would only replace the engine if the one you have is shot or if you wanted more power which you probably do not need at this stage. I have an Enya 35XH, not a real powerful engine but it is great to learn on. One trip to the field and one of the experienced pilots should be able to diagnose the problem. Anyway, good luck and keep us posted on what you find.