GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
I doubt it is a stuck ring if it is ZERO compression.-----Amazing how these motors will start and run with major damage to one cylinder.----Pull the head off and I think it will be obvious as to what happened !----Model # is ??