This one looks like it's been ridden hard and put away wet.
Ser# says it June 1975 Silver Century.
I have "IT" (no name yet for this one), here at work (warm shop), to let the lower unit drip out, (water and oil).
2 questions....................
I grabbed the flywheel to spin it to help the lower unit YUK drain out and it has play up/down, maybe 1/16" of an inch??

I didn't check the other motor at home to see if that one does, (I'm thinking not), but I will.
If it were a bike motor, I'd get "nervous" but I know these motors are, well loose tolerance!
Next.
I was driving home with "IT" and it spoke to me.........
"Joe, You know what would be cool on me"?
"What" I replied.
"It'd be cool if a gearbox could be added to me, so I'd have forward and reverse, you know neutral and all that sorta stuff" like a more "normal" outboard.
Is it possible?
Can I swap out a gear box for the lower unit on this year?
AND..
Are they @ and for sale?
Thanks!
Joe
So many "poor things" that need to be fixed up, so few $$!