I have a 77 Johnson 35HP that is getting water into the top cylinder.
I have checked head gasket, exhaust gasket both did not look compromised.
do not see any cracks in head or cylinder wall/water jacket.
Any help appreciated
Hopefully you resurfaced your cylinder head.------Yes it was warped !---They all are after year of service.----Piece of emery cloth and glass plate does the trick.
Not in my estimation but im often surprised.
Sometimes its a tiny leak in the gasket that i never find. Defiitely plane it on a mirror, glass covered in light sandpaper
I have thought about rebuilding complete but hate to do it if block is cracked and i can't see it.
It was sitting in weeds for about 6 years before I got it.
Did run when parked but perhaps other seals have dried out
