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Max Online: 36273 @ 01/23/13 02:34 PM
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#11388188 - 02/03/16 06:11 AM Trolling motor interference on Humminbird?
361V Online   content
TFF Team Angler

Registered: 11/21/08
Posts: 4031
Loc: somervell county
My Humminbird 997 up front with a transducer clamped to the trolling motor now gets a lot of interferance that covers the screen with lines from top to bottom while running the trolling motor. New problem. Works perfect except when receiving interferance while running motor. What caused this after years of no problems? Need a new transducer? Thank you, 361v.
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#11388202 - 02/03/16 06:26 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
SteezMacQueen Offline
TFF Team Angler

Registered: 11/02/14
Posts: 3023
Loc: Red Oak, Galveston, and Pagosa...
Loose ground on the graph, or loose ground on the tm. Try checking for good connections on everything before replacing expensive parts. Sometimes when the TM motor is starting to wear out, it can cause interference.
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Daiwa
Megabass
Lews



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#11388203 - 02/03/16 06:29 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
blackhorse Offline
Outdoorsman

Registered: 05/13/08
Posts: 113
Loc: Morgan, Tx
i have exact same issue

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#11388263 - 02/03/16 07:14 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
Wayne P. Online   content
TFF Team Angler

Registered: 11/16/10
Posts: 3432
Loc: Charlottesville, Va
"after years of no problems"

Fix your trolling motor.
_________________________
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1

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#11388302 - 02/03/16 07:46 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
ezbassin Offline
TFF Guru

Registered: 01/15/04
Posts: 12204
Loc: Mansfield, Tx.
I have the same problem with a Minn Kota Maxx 74 and a Lowrance touch 9. I added a ground wire clamped to the head of the T/M and to a ground in the boat and still have interference.


Edited by ezbassin (02/03/16 07:47 AM)

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#11388319 - 02/03/16 07:55 AM Re: Trolling motor interference on Humminbird? [Re: Wayne P.]
361V Online   content
TFF Team Angler

Registered: 11/21/08
Posts: 4031
Loc: somervell county
Originally Posted By: Wayne P.
"after years of no problems"

Fix your trolling motor.
This is where I'm lost. What is the "fix" for a Fortrex that seems to running perfect? Not sure how its grounded but will check. TY, 361v.
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#11388400 - 02/03/16 08:28 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
Wayne P. Online   content
TFF Team Angler

Registered: 11/16/10
Posts: 3432
Loc: Charlottesville, Va
Since you have had no problems until recently, the brushes in the motor are probably worn down enough to cause RFI. Fix your motor.
_________________________
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1

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#11388410 - 02/03/16 08:34 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
G Rod Offline
Angler

Registered: 10/18/10
Posts: 299
Loc: N. Richland Hills, TX
I think most of the Fortrex units have a ground fuse in the head. If the fuse pops you will suddenly have interference. Pull the top off the head unit and check the small blade fuse.
_________________________
2016 Basscat Cougar FTD, 250 Mercury
www.mercurymarine.com -Mercury Pro Staff
www.bcfw.org Bass Club of Fort Worth

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#11388411 - 02/03/16 08:34 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
bradnitro175 Online   content
TFF Team Angler

Registered: 07/11/08
Posts: 3770
Loc: Dallas,tx
I think the minkotas have a ground fuse in the head.
i have the same problem on a motorguide.geounding the motor helped some


Edited by bradnitro175 (02/03/16 08:35 AM)
Edit Reason: G rod beat me to it

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#11388445 - 02/03/16 08:49 AM Re: Trolling motor interference on Humminbird? [Re: 361V]
Karl Dietz Offline
Pro Angler

Registered: 07/07/13
Posts: 925
Loc: Weatherford, Texas
Make an appointment with Nevelle May at Lake Area Marine behind the Minnow Bucket at Lake Fork. 903-393-9500

He will take your motor apart and run a ground wire from the brushes...inside your shaft...and then connect to the ground wire at the plug. He'll also check out your brushes, etc. on the motor. He did mine and it fixed it.

Be sure to call because his hours are very spotty!

Takes about an hour....then go fishing! Perfect day!

If that's too far, call Don Boris at Boris Marine in Fort Worth 817-624-3932


Edited by Karl Dietz (02/03/16 08:55 AM)
_________________________
Karl Dietz
2015 BassCat Cougar/250 Mercury ProXS
2 HB Helix 12's


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#11388893 - 02/03/16 11:35 AM Re: Trolling motor interference on Humminbird? [Re: Karl Dietz]
steve@scp Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6626
Loc: Quitman,Tx
Originally Posted By: Karl Dietz
Make an appointment with Nevelle May at Lake Area Marine behind the Minnow Bucket at Lake Fork. 903-393-9500

He will take your motor apart and run a ground wire from the brushes...inside your shaft...and then connect to the ground wire at the plug. He'll also check out your brushes, etc. on the motor. He did mine and it fixed it.

Be sure to call because his hours are very spotty!

Takes about an hour....then go fishing! Perfect day!

If that's too far, call Don Boris at Boris Marine in Fort Worth 817-624-3932


Nevelle can definately fix that issue... 99% of the time.
since spring is springing... he is at the shop alot more.
_________________________
www.hydrodynamics-usa.com
903-763-5225





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#11388975 - 02/03/16 12:01 PM Re: Trolling motor interference on Humminbird? [Re: 361V]
RW Fred Offline
Outdoorsman

Registered: 01/06/15
Posts: 65
Loc: Rockwall, TX
I had all the above done and it did not work. Turned out it was the connection to the battery was dirty.

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#11389061 - 02/03/16 12:32 PM Re: Trolling motor interference on Humminbird? [Re: RW Fred]
steve@scp Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6626
Loc: Quitman,Tx
Originally Posted By: RW Fred
I had all the above done and it did not work. Turned out it was the connection to the battery was dirty.


ahh, gotchya.. i guess that was your boat nevelle and i was talking about the other day.
_________________________
www.hydrodynamics-usa.com
903-763-5225





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#11389248 - 02/03/16 01:55 PM Re: Trolling motor interference on Humminbird? [Re: 361V]
Lil' Louie Offline
TFF Celebrity

Registered: 02/25/07
Posts: 9387
Loc: Lewisville/Lake Fork
Dad's been having the same probems as well as the depth reading being sporadic at times.
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www.traininglikechampions.com

PB 12.88lbs, Lake Fork 3-17-2013 8:45 a.m.



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#11389263 - 02/03/16 01:59 PM Re: Trolling motor interference on Humminbird? [Re: Lil' Louie]
steve@scp Offline
TFF Celebrity

Registered: 08/25/06
Posts: 6626
Loc: Quitman,Tx
Originally Posted By: Lil' Louie
Dad's been having the same probems as well as the depth reading being sporadic at times.


lake area marine (nevelle may)
903-393-9500

he can fix it.
_________________________
www.hydrodynamics-usa.com
903-763-5225





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