Quote Originally Posted by Countryboy N.C. View Post
Your motor is generating electrical noise, run a ground wire from motor to the battery ground. it will go straight to battery and not through the depth finder first. i had the same problem up front on the depth finder, I run a ground wire from the trolling motor to ground on battery . before I did that, I had to run the setting so high it filter out the good returns also.What good is that depth finder if you got to filter out all the returns.

This depth/fish finder is now on it's own battery now with nothing else connected to it.