fwiw I just bought an engine for my truck ... compression ranged from 350 to 380... was a cold engine that hasn't run in 2 years.... New on this one is about 450 but since it was a cold engine and had set so long I'm satisfied... those numbers will come up with some run time....
The same applies to boat motors... You won't usually get the best numbers on a cold engine especially if it has set long enough to get even the slightest surface rust in the cylinders.... If you possibly can get it up to operating temp before testing..... It only burns ur fingers a little lol
|