Trolling motor prop?

[ChampioNinKY]

Just one nut tap it, it should come off.

[Basswipe]

That one nut is it, but they can be hard to get off. Try tapping it with a mallet. Be careful not to bend the shaft though.

It's best to take your prop off of your trolling motor once or twice per year just to keep it from getting stuck like that.