put some after run oil in it and work it back and forth on the tight spot for a while by hand, just get everything moving back and forth, then put it back on what ever you want it on and heat it up with a hair dryer or some kind of heat gun to around 200 or so. and it should be good to go. but you may still have to "break it loose" every now and then with a screw driver between fly wheel and chassis. just try to have it on bottom dead center when you try to crank it. it took my Alpha engine a gallon and a half to loosen up enough where i didnt have to break it loose every now and then.