Hi pejuve , I have one on my Modeltech P47. Have you had a chance to get some rpm numbers and which prop are you using? I am only getting 11,000 on an APC 12-6. Sounds low to me?!? The throttle barrel was also sticking today so I am going to take that apart and take see whats happening. Also the instructions state to start the engine with the needle valve set at 1 3/4 turns out. Mine won't even start at that. I need 2 3/4 turns out to start and it will die if I close it past 2 1/2 turns. Are the instructions wrong or did I juist get a lemon?? Thankx for any feedback. [8D]