Trolling motor mounted transducer

[midwestfisher]

Folks, I have a very old locator however it still works well. Would like to move this to using it on my trolling motor. I am looking for where I might be able to find a mount for this unit. Does anyone know? I have looked and cannot find dimensions for the ones out there to see if it would adapt.

 

[redbug]

a picture of the transducer might help