Who knows how to fix this?

[Hawg]

The only piece that is broken is little plastic part that allows it to rotate. Surely, I don't have to buy a new transducer??????!!!!!

[ducker]

Looks like a dondon project to me! He will have it duct taped up in no time and might even put his multimeter on it for something or another!

[Rees Guide]

Drill a hole in it, put some rubber washers on either side and put it back on.

[martyrm]

What does that one go to, looks like one I might have

[BuckeyeKdog]

I have had a lot of luck with PC7 epoxy putty for repairing pieces like the one you show.

[satdoc1]

J B weld it. Let it cure for 24 hours.

[KDAVID1]

Do you have the broken part? If so epoxy it back might work for awhile

[Iwannafish]

I am thinking JB Weld.

[GitDaGrease]

I fixed one a few years back and it's still holding. Used a two part mixture from Wal mart called plastiweld I think was the name of it.

[Hawg]

What does that one go to, looks like one I might have

It it goes to the Lowrance Mark-4