I am trying to break in my .61 FX. It is set up according to the manual in terms of needle turns etc. However the engine is mounted upside down as opposed to a normal trainer where the engine is upright. I try to start it and the engine will not turn over no matter how hard you pull, will break something if i pull any harder. However if I flip the plane upsidedown so the motor is upright not only can I turn over the engine easily but I can get it to run beatifully. When I start to trun the plane over again so I can taxi the plane around the engine stops immediately as soo as the engine is upside down again.

Is there anyone who can help me out.

Thanks

Ickeboggle