Elite 7ti Trolling motor Interference Help

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Elite 7ti Trolling motor Interference Help

Postby Lugnut » Mon Dec 11, 2017 11:52 am

I've had the same set-up for a year and a half with no issues....last 2-3 trips out I am getting these bars when I hit my trolling motor. Sometimes the lines are not as dark, and sometimes it doesn't happen....any ideas, help would be appreciated.

Lowrance Interference Issue.jpg
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Re: Elite 7ti Trolling motor Interference Help

Postby Edd » Mon Dec 11, 2017 12:28 pm

Is this Elite ti at the bow, connected to power at the bow?
If so, maybe some main power lines/power to ti got shifted closer together.
Maybe a ground wire is broken or disconnected?
Maybe your TM batteries are weak or less than 12.6 vdc?

You could try a ferrite choke on the ti power cable. This sometimes helps.
Best is to create dedicated for the MFD if not already done.


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Re: Elite 7ti Trolling motor Interference Help

Postby Marc » Mon Dec 11, 2017 10:02 pm

Believe it or not, it is also worth pulling off your trolling motor prop and make sure no line or debris is binding the shaft. Also inspect the blades of your trolling motor prop. When they get dinged or out of balance, they can cause interference, sometimes only at certain speeds (similar to a car tire that gets out of balance produces wobble).

Damage to the magnets in your trolling motor can also cause interference (sometimes happens from impacts with underwater objects, or from running in rough water).

Otherwise inspect your wiring and batteries as Edd suggested.


Ken Sauret
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Re: Elite 7ti Trolling motor Interference Help

Postby Ken Sauret » Tue Dec 26, 2017 7:45 pm

Marc is correct in his advise to inspect the shaft of the electric trolling motor. The motor itself will produce "noise" that the receiver in the transducer will pick up. Since the unit does not recognize the noise or sound it picked up, the software in the unit just produces a telephone pole type black line on the screen.

I have seen issues with the electric motor itself not being grounded and when a ground wire is connected, the interference goes away or at least it is reduced.
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