Is that a 5 speed or variable speed drive?
I know, that doesn’t answer your question but I have a new lower unit for a 12.volt 5 speed you can have to use for parts or put it all back tougher and run as new.
I personally think what you’re in for there won’t be worth your effort.
Got a used trolling motor from a fiend of mine's son. He told me it worked before I bought it but it does not. Tested all the electrical components in the head of the unit and everything seems to test fine so I took the motor apart and there was a lot of corrosion and the brushes were stuck. I took out the brush plate and sanded down the brushes to get them working smoothly again.
That's when I noticed this at the end of the motor shaft. I assume it is supposed to be a bearing but it is seized tight.
My question is.....is this a bearing? If so, do I need a bearing puller to replace it or how do you do it?