I have a humminbird 798 hd that came with the standard transom tranaducer. It's never been mounted. I fish from a 15' rowboat that I decked and mounted a foot pedal trolling motor to. I was wondering if I could make a portable mount utilizing the transom tranaducer it came with? I was thinking of something "U-shaped" that could slip onto back of the boat, where the tiller mount is? Anyone do something like this before?

Yep done that too and several other methods.

A stick and C-clamp works too.

 

If you have a transom trolling motor, you can just attach it to the bottom of that with the trolling motor adaptor bracket.

Yep done that too and several other methods.

A stick and C-clamp works too.

If you have a transom trolling motor, you can just attach it to the bottom of that with the trolling motor adaptor bracket.

I'm trying to avoid having to buy another piece of equipment. Is the tranaducer that my 798ci hd so came with the HDR sidescan tranaducer, or is there a better one?

The standard transducer for the 798 is the Compact SI transom mount XNT 9 SI 180 T.

The trolling motor puck version is the XTM 9 SI 180 T.

 

It can use several others.

 

The top of the line SI transducer is the XHS 9 HDSI 180 T. It is 2" longer and has longer SI crystals.

Those longer crystals produce a thinner SI pulse which produces sharper images.

I used to use the HDSI with my 798 before I got some larger display models.