Quit for the day as was freezing. Are you guys thinking what I am? Cambelt! I will take cover off tomorrow or a plug out and feel for compression.
My Accord used to do a similar trick if it was parked on a hill. It would spin fast and only when returned to flat would it spin normally and start. I am just fearing that it is spinning very fast because there is no compression

Is this an engine that does damage when a belt gives? Only starter pressure mind .