The one big killer of 22 cube, OMC 25s has always been separation of the water jacket aluminum and the steel cylinder sleeve. You can see how narrow the head gasket sealing area is, already, where the cylinders are closest together. If corrosion starts to work it’s way into the steel/aluminum dividing line in those areas, it’s good bye, engine. It will never hold another head gasket. When you said, “I’m surprised it hadn’t cracked away in that section,” that’s not what you’re talking about, I hope.
Long live American manufacturing!
