hi all looking for any thoughts on the below problem: Tecunseh XL/C 17hp OHV mod OHV17 204605B (h) fam STP 490UIG2RA DOM 7346S Problem is machine will not turn over more than once. (with plug out the engine will turn over all day long so no prob there) I have spark. So I suspect the exhaust valve lash if off. Sure enough at TDC I can get .008 feeler guage under the rocker. Supposed to be .004 according to shop manual. I reset it and no dice. Turns over once and cant get past that compression. Is it possible that the comp relieft on the cam is "stuck" or frozen? Never dealt with a compression relief that is on the cam before. I believe mine is NOTthe kind that is a small bump on the cam journal. Can anyone shed any light on what I might be up against/ how to fix this. I understand that the comp relief is part of the cam and not a separate part correct?? thanks for any input.