Thread: Interference Assistance

Did you use the new power cable? It has that little puck in it that helps to cut down noise.
It could also be prop wash depending on how the attitude of the boat changes as you throttle into it. Maybe try trimming up.

Originally Posted by OrangeAgent

Did you use the new power cable? It has that little puck in it that helps to cut down noise.
It could also be prop wash depending on how the attitude of the boat changes as you throttle into it. Maybe try trimming up.

Yes to the power cable and I have tried trimming the motor.

There is Noise Filter adjustment in the Sonar data sources Menu ...

But filters "filter" everything - even good returns ...

It may be better to have the engine tested to fix the source of the interference (instead of trying to mask it in the Sonar unit) ...

Rickie

Like Rickie said motor first. Here is what I would try first. Pull cowl, trace down every wire you can find that goes to ground, remove those and clean area good along with ring eye. Make sure each one has a star washer that bites into block. Then go to wiring that is attached to battery and check each ground wire to make sure wire and connector are connected good. Check that power wire to finder is not wrapped around or laying side by side with main wires to motor to tach.

Figured out the issues and yes some it was wires around wires so I rerouted some the transducer cables which fixed some of the interference but not all of it. Fixed it mostly by going into the setting and narrowing the frequency on the sonar. Now it works like a champ and how I expected it to perform. We also put some magnetic ferrites on some of the cables.

Thanks for the insight some of you gave and also for taking the time to help.

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.

Originally Posted by Countryboy N.C.

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.

Originally Posted by KAYAKLIPJERKER

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

My trolling motor was on a different battery than my depth finder, but it still picked up the noise from the trolling motor, but that might take care of your problem.