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#12520971 - 11/29/17 10:17 PM Interference on graph.
Ranger-188-2007 Offline
TFF Team Angler

Registered: 01/03/04
Posts: 3674
Loc: Nacogdoches Tx. USA
Have a Humminbird 688 on my bow trolling motor. Unit has worked great, but a few days ago when I would mash the trolling motor button on the foot pedal, lines would show up on the graph. When I let off the foot pedal the lines stop. Just wonder why all the sudden this is showing up. I did put a piece of rubber between the transducer and the trolling motor, but didn't change anything. Any suggestions? Thanks.
All fishermen are legends in their own minds! Ranger Boats, Yamaha Outboards, Humminbird Electronics,Motor guide, and all the tackle in the world.

#12521076 - 11/30/17 05:54 AM Re: Interference on graph. [Re: Ranger-188-2007]
Wayne P. Online   content
TFF Team Angler

Registered: 11/16/10
Posts: 3995
Loc: Charlottesville, Va
Getting RFI when you did not have it previously can be caused by several things:
Worn motor brushes
Bent prop shaft
Damaged/out of balance prop
Damaged motor shaft seal/water intrusion
Damaged transducer cable
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, SOLIX 12 SI, 360, RC-1

#12521360 - 11/30/17 11:30 AM Re: Interference on graph. [Re: Ranger-188-2007]
Travis@BorisMarine Offline
Extreme Angler

Registered: 04/07/12
Posts: 1217
Loc: Lake Worth
Could be trolling motor yes. But l check your big motor. There's these little rectangular blocks that are anoids. If there is white corrosion all, over then sand it and clean it and see if it continues. If it helps then you have something else beside the TM issue.

Edited by Travis@BorisMarine (11/30/17 11:32 AM)
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