First of all I'd like to say hello to everyone, as I am new here, and would like to thank everyone for all the usefull info that's already been provided to so many. Now for my question. I am not new to nitro, nor would I call myself and expert, I have never worked with a .46ci nitro engine before and was wondering about the amount of compression. The reason I ask is because I recently purchased a used GST and can't get it started (rotostart). I am able to turn the flywheel over by hand. Is that normal or is it time for rebuild? I also have fuel burnt onto manifold, does that affect starting? Lemme know what u guys think.