I'm new to boating, all around. Just picked up for cheap a 1986 SeaSwirl Spirit with OMC (what I believe to be) 800 Stringer (propulsion assembly #302STHRCOM)
[3.0L I4 - GM, I *think*]
The lower gear case had water in it, which froze over winter & cracked the case.
I've found a used, lower case...