Fishfinder Electrical Interference Issue...

[djtdmd]

Hey Guys- I have a Northstar 6000i, and get vertical streaks on the sounder display only when the engines are running. Turn the engines off, and the vertical spikes disappear. I have a Boston Whaler, everything was factory wired. Any ideas? I have heard of simple stuff like putting ferrites on the cables, to separating the cables(almost impossible because Whaler only gives a small tube to pass the wires up), to adding electronic filters. Any help here would be appreciated, Thanks!

[Hotrod]

Ugg..  yea.. those filters would do the trick.. Maybe there is another way. but I don't know it. 

If your running 2 batteries. or go to 2 and run your electronics off that one..

Call Radio shack 

[djtdmd]

Thanks, but could you elaborate on the 2 batteries deal? I do have 2 batteries...

[Reckless]

I think he is trying to say run your electronics off of 1 battery. Run a separate hot and ground wire just for electronics.
   How is the transducer? Since that is close to the engines. If this just started that would be the first place I would look.
 

[Hotrod]

 

[Hunter 2]

Did you check Northstars websight for troubleshooting?

[ped579]

Not for nothing but the first thing I would do and not even check is to clean all the grounds for all batteries.  Corrosion on the ground will make for noisy engine electronically.

Especially if this just started out of the blue.

Noise can be a problem to find but I bet by cleaning all your ground lugs will help if not get rid of the problem.  Do this on all grounds as the noise could follow through something as simple as a bad grounded light circuit.