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Old 05-06-2017, 07:47 AM   #1
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What is this for?

We bought our boat with all the tools and spares the original owner had on the boat when he was running it up and down the east coast and he spent a lot of time in the Bahamas. Found this in a tool box the PO left in the engine room. Can anyone tell me what this is and it's likely purpose?

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Old 05-06-2017, 08:03 AM   #2
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An anode
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Old 05-06-2017, 08:04 AM   #3
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That's a Rudder Zinc. With the wires and alligator clip the owner probably used it in marina's that had a lot of stay electricity in the water, it would have helped reduce the sacrificial load on his installed zincs.

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Old 05-06-2017, 09:14 AM   #4
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That's a Rudder Zinc. With the wires and alligator clip the owner probably used it in marina's that had a lot of stay electricity in the water, it would have helped reduce the sacrificial load on his installed zincs.



Also

If you are in a marina with a lot of freshwater inflows that cause a thermocline of sorts you can lower this over the side down to the saltwater. In other words your boat floats in freshwater on the surface but say 6-8' below is saltwater.
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Old 05-06-2017, 09:20 AM   #5
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still puzzling why two wires, black and red connected together. Only one wire would be needed for anything.
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Old 05-06-2017, 04:05 PM   #6
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still puzzling why two wires, black and red connected together. Only one wire would be needed for anything.
I thought maybe a Corrosion anode to measure Corrosion? The Red and Black wire connected together is what I don't get too?...
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Old 05-06-2017, 04:45 PM   #7
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Homemade AED? See the alligator clips
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Old 05-06-2017, 04:49 PM   #8
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Homemade AED? See the alligator clips


Ok I'll bite... what is AED?
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Old 05-06-2017, 04:51 PM   #9
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Ok I'll bite... what is AED?
Birth control
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Old 05-06-2017, 05:04 PM   #10
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Old 05-06-2017, 05:08 PM   #11
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Perhaps, just perhaps they are to make up for their small gauge by going to x 2. The kinds of currents these systems handle are very small, and a larger wire size helps reduce voltage drop and improve conductivity. Most bonding systems that I see are 10 ga, your boat probably has a bonding system, green wire connected to the transom zinc and daisy chained to through hulls and struts, etc.

Perhaps,

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still puzzling why two wires, black and red connected together. Only one wire would be needed for anything.
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Old 05-06-2017, 05:11 PM   #12
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are you in aluminium hull ?

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Old 05-06-2017, 05:21 PM   #13
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Ok I'll bite... what is AED?


Automated External Defibrillator... ;-)
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Old 05-06-2017, 05:50 PM   #14
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We bought our boat with all the tools and spares the original owner had on the boat when he was running it up and down the east coast and he spent a lot of time in the Bahamas. Found this in a tool box the PO left in the engine room. Can anyone tell me what this is and it's likely purpose?

Norm

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Only the original owner would know what it is supposed to do. It's an ordinary sacrificial anode with two wires attached.

If it's supposed to be an auxiliary anode, the proper wire color would be green but electricity doesn't really care about the color of the insulation.

As for two wires attached to the same place, that's a mystery as well. I'll bet there's a good story behind this. Just don't laugh until he's out of sight.


BTW: It's interesting how he put the red clip on the black wire and the black clip on the red wire. Maybe a sign that you should get your boat's electrical system checked out by a pro.
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Old 05-06-2017, 06:00 PM   #15
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are you in aluminium hull ?

Hugues
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Old 05-06-2017, 06:04 PM   #16
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Only the original owner would know what it is supposed to do. It's an ordinary sacrificial anode with two wires attached.

If it's supposed to be an auxiliary anode, the proper wire color would be green but electricity doesn't really care about the color of the insulation.

As for two wires attached to the same place, that's a mystery as well. I'll bet there's a good story behind this. Just don't laugh until he's out of sight.


BTW: It's interesting how he put the red clip on the black wire and the black clip on the red wire. Maybe a sign that you should get your boat's electrical system checked out by a pro.
I supect the rubber insulators are just switched -red on black and black on red...

The boat is wired fine.
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Old 05-07-2017, 06:22 AM   #17
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And then again, perhaps, just perhaps, there are 2 pieces of underwater metal that were showing signs of electrolysis and the 2 wires are so both of those could have some extra protection?

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Old 05-07-2017, 07:01 AM   #18
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Hanging Anode Over Side Re Electrolysis

BoatUS – BoatTech – Sacrificial Zincs by Don Casey
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Old 05-08-2017, 06:56 PM   #19
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Also

If you are in a marina with a lot of freshwater inflows that cause a thermocline of sorts you can lower this over the side down to the saltwater. In other words your boat floats in freshwater on the surface but say 6-8' below is saltwater.
It would seem that if your boat was in fresh water ,you wouldn't need to worry about electrolysis in the first place.
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Old 05-08-2017, 07:14 PM   #20
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That's a future disaster. Get rid of the red wire!
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