I have a Carlsen .12GT engine that's been sitting in my drawer for some time. I took it out and realized that the crank is rather lose and my glow plug is "stuck" (I can't get it out with my cheap axx tools).
I can now turn the crank one full cycle with my bare hands by twisting the shaft, no flywheel attached! (I'm sure as I can see the piston move up and down from the exhaust port).
I am assuming this is not normal? What can I do to build up the compression?