Mercruiser Model MCM 4.3 EFI ENGINE 0M090084
Water in crankcase remove spark plugs water came out of cylinders 6,4,3, removed oil add new.Did a compression test on cylinders 6,4,2 i have 240 psi on cylinders 5,3,1 i have 190
I've rebuilt a few engines work on many cars but not to good on...
