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#11917761 - 11/04/16 10:12 PM Help! Boat question
Bearkats Offline
Outdoorsman

Registered: 02/25/07
Posts: 82
Loc: Little Elm, Tx
My boat has currently started building this white powdery substance almost like corrosion and our prop is rusting. The white powdery substance is on trolling motor and and the jack plate. Any ideas on what is happening?
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#11917763 - 11/04/16 10:13 PM Re: Help! Boat question [Re: Bearkats]
SteezMacQueen Online   sleepy
TFF Team Angler

Registered: 11/02/14
Posts: 3426
Loc: Red Oak, Galveston, and Pagosa...
Aluminum oxidation.
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#11917796 - 11/04/16 10:49 PM Re: Help! Boat question [Re: Bearkats]
Flooringit Online   content
Pro Angler

Registered: 06/30/15
Posts: 715
Loc: Bella vista .arkansas
I've read something about bad grounds in battery's will make that way worse.
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#11917833 - 11/04/16 11:26 PM Re: Help! Boat question [Re: Bearkats]
Tiltedtitan Online   content
Outdoorsman

Registered: 03/24/08
Posts: 214
Loc: Frisco, TX
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#11917835 - 11/04/16 11:27 PM Re: Help! Boat question [Re: Bearkats]
Tiltedtitan Online   content
Outdoorsman

Registered: 03/24/08
Posts: 214
Loc: Frisco, TX

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#11917839 - 11/04/16 11:29 PM Re: Help! Boat question [Re: Bearkats]
BThomas Online   content
TFF Celebrity

Registered: 02/15/09
Posts: 7178
Loc: Rockwall,Tx
Electrolysis

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#11917862 - 11/05/16 12:08 AM Re: Help! Boat question [Re: Bearkats]
Tiltedtitan Online   content
Outdoorsman

Registered: 03/24/08
Posts: 214
Loc: Frisco, TX
How do we save the prop? And fix the white stuff?
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#11917864 - 11/05/16 12:18 AM Re: Help! Boat question [Re: Bearkats]
Mulholland Offline
Extreme Angler

Registered: 10/28/13
Posts: 1887
Loc: Plano, TX
Sacrificial anodes need replacing?

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#11917929 - 11/05/16 06:27 AM Re: Help! Boat question [Re: Bearkats]
wagonwheel Offline
Angler

Registered: 06/06/11
Posts: 406
Loc: Mansfield, TX
It is corrosion. Aluminum corrodes (the white powdery stuff) and steel corrodes (the orangish/reddish stuff, aka rust). The engine probably does have some sacrificial anodes somewhere that need replacing. These are usually made of zinc and will corrode in place of the motor parts. This looks as though you are using the boat in salt water and not cleaning it, or you are coming into contact with some other substance that is accelerating the corrosion. There could also be some kind of battery/ground issue, although I think that is unlikely--but it is possible. Do some research on how corrosion works and apply the knowledge to your situation. Remove the electrolyte, clean and protect.


Edited by wagonwheel (11/05/16 06:28 AM)
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#11918046 - 11/05/16 08:27 AM Re: Help! Boat question [Re: Bearkats]
Donald Harper Offline
TFF Guru

Registered: 01/25/08
Posts: 12745
Loc: Justin, TX.
It is the trolling motor causing this problem. There is a bad ground somewhere and or the brushes need adjusting. I had the same problem on one of my boats years ago and swapped out the trolling motor; problem solved. The electrolysis travels between the two farthermost metal objects on the boat which is trolling motor to the prop.

Boris Marine is the best at solving this problem. Also have the blocks changed out at the same time to get a fresh start. Prop can be rebuilt and put through a heating process to get a fresh start on that also. It is expensive.
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#11918396 - 11/05/16 01:18 PM Re: Help! Boat question [Re: Donald Harper]
Jeff Gilbert Offline
Pro Angler

Registered: 04/26/10
Posts: 780
Loc: DFW Texas
Originally Posted By: Donald Harper
It is the trolling motor causing this problem. There is a bad ground somewhere and or the brushes need adjusting. I had the same problem on one of my boats years ago and swapped out the trolling motor; problem solved. The electrolysis travels between the two farthermost metal objects on the boat which is trolling motor to the prop.

Boris Marine is the best at solving this problem. Also have the blocks changed out at the same time to get a fresh start. Prop can be rebuilt and put through a heating process to get a fresh start on that also. It is expensive.


^^^ This is correct.
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#11920461 - 11/06/16 08:09 PM Re: Help! Boat question [Re: wagonwheel]
Bearkats Offline
Outdoorsman

Registered: 02/25/07
Posts: 82
Loc: Little Elm, Tx
What is the best way to clean it?
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Pastor Hollis

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#11920614 - 11/06/16 10:28 PM Re: Help! Boat question [Re: Bearkats]
Tiltedtitan Online   content
Outdoorsman

Registered: 03/24/08
Posts: 214
Loc: Frisco, TX
Specifically the prop, best way to take rust off?
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Pastor Tim
Be Relentless.

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#11920651 - 11/07/16 12:31 AM Re: Help! Boat question [Re: Bearkats]
David Burton Online   confused
Extreme Angler

Registered: 07/14/11
Posts: 1628
Loc: McKinney, TX
WD-40 if it is just surface, get it off quick. If it has aleady broken the surface And created pitting, you'll not be able to keep it off.

Fix the source of the problem first!
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2015 Skeeter FX 21


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#11920681 - 11/07/16 05:04 AM Re: Help! Boat question [Re: Bearkats]
Lucky Al Offline
Extreme Angler

Registered: 08/17/04
Posts: 2375
Loc: Rio Grande Valley
I'm not going so far as to recommend this, but I once read to install a common negative ground wire/cable between the trolling motor batteries and the starting battery. I did do that and had no problem with electrolysis. I no longer have that cable connected now and so far (knock on wood) still don't have a problem. My problem, though less serious, is lime accumulating on the lower unit, from the hard water in the river system/lakes down here. A 50% mix of water and vinegar helps remove it.

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