its fine sign thats its still good seal if it was slack then thats time to worry
you got oil in there sealing the all the way round the piston no seal no compression no fly :-(
Feb 24, 2010 Rating
My 2 cents worth by: Patrick
IS it an ABC type Engine? If so its sticks When you turn it over due to the fit of the piston in the cylinder most likely. I'm not an expert but that would be my best guess. Doesn't sound like the engine has been ran allot. As long as it runs fine and fly's the plane i wouldn't worry about it to much.