Transducer mounting location?

[mtrue68]

I recently bought 18’ 1985 Champion boat, the transom is stepped like Ranger or Skeeter boats. The back tapers in, which doesn’t leave any space that is not behind the stepped part. Does that step interfere with water flow that would cause the transducer to not read the bottom or fish accurately? Where would be the best place to mount a transducer?

[tjsdad38]

In the bottom of the sump next to the bilge pumps on a flat surface.

[chris63]

Is the boat aluminum or fiberglass?

[mtrue68]

Thanks for the help.

I have it mounted now.