Bummer..... I had a 50 horse outboard engine like that. The prevous owner said it ran one day and when he went to start it the next day it wouldn't turn over. He thought there was something wrong with the lower unit/drive. It was in my storage for a couple of years. Finally tore into it one day to see what it would take to fix it, and it was pretty much just a rusted mass inside the engine. The only thing I saved were some bolts and nuts. I soaked it in various oils for days, used heat, etc. but the pistons were so frozen with rust in the cylinders I couldn't even attempt to save the block. (And I have saved some really badly rusted blocks before in my life!)

Oh well, at least these conversion engines are cheap and relatively easy to find....

AV8TOR