Waunaboat,
I plan on doing a full mechanical and cosmetic restoration on this one, do you know of any known tricks for the least amount of damage?
I would go with a the 1/3ATF 1/3 acetone 1/3 diesel mix because it would also help to remove any rust, paint, etc.. and this would help to make the cosmetic restoration easier. You are probably better off getting any gunk and rust out of it with a solution before you try to remove it with force so that you do not damage the walls of the cylinder or piston should there be anything grinding inside.
"Outboards seem to multiply exponentially..........I find that for every finished project, there are two more waiting to be completed."