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Old 12-09-2016, 05:13   #16
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Re: I have excessive zinc anode replacements

The proper way to rest your underwater hardware is with a silver/silver chloride reference cell. A pencil zinc is just going to cause you a headache as you try to make sense of random voltages.


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Old 12-09-2016, 05:38   #17
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Re: I have excessive zinc anode replacements

We used the dive service "Scubaduba" when our Hunter 450 was in Wilmington and Long Beach Marina. They always took underwater photos of the zincs and provided us with he old ones to show any issues. We never experienced the replacement frequency you have.
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Old 12-09-2016, 06:50   #18
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Re: I have excessive zinc anode replacements

Greetings and welcome aboard the CF, Ron.
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Old 12-09-2016, 06:54   #19
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Re: I have excessive zinc anode replacements

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The proper way to rest your underwater hardware is with a silver/silver chloride reference cell.

Yes, that is what BoatZincs.com sells (and I purchased) for a pretty sum. Appears to work quite well for its intended use.


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Old 12-09-2016, 09:39   #20
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Re: I have excessive zinc anode replacements

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Yes, that is what BoatZincs.com sells (and I purchased) for a pretty sum. Appears to work quite well for its intended use.


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There are other reference cells available for purchase, but they're difficult to find, and not quite as nicely made.


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Old 11-01-2018, 08:35   #21
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Re: I have excessive zinc anode replacements

when i first arrived in barra de navidad my boat wa s using zincs every 2 to 3 months. ok so i had a GOOD 12 v electrician who had spent 30 years wiring shrimpers touch my electricals. i could not see his hands as he changed this and changed that and made my formosa an electrical haven, now able to go 1.5 YEARS between zincs in an allegedly hot marina. try it.
ps while i was in port of lost angels, my zincs on my boats lasted 3 to 5 months. i was in lighthouse marina. also newmarks, at a different time. aug, 1990-1995, aug, in pola.
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Old 13-01-2018, 11:38   #22
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Re: I have excessive zinc anode replacements

Thanks Zee Hag.
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Old 13-01-2018, 14:57   #23
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I have excessive zinc anode replacements

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I have been told by boat owners in virtually every one of the dozens of marinas I have worked in over the last 22 years that their marina is "hot." Usually this is not the case and is the result of the boat owner simply being in denial about the state of his own electrical system. Rapid anode depletion is almost always the result of an electrical issue aboard the boat in question.


I’ll bet Lunch this is correct, I know a “hot” marina is possible, but I have never experienced the phenomenon myself.
I just went through this myself, it appears that incorrect inverter wiring was my issue, although it could be anything that allows DC voltage to “leak” to ships ground or the water.
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Old 13-01-2018, 15:05   #24
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Re: I have excessive zinc anode replacements

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I’ll bet Lunch this is correct, I know a “hot” marina is possible, but I have never experienced the phenomenon myself.


I have earned my living installing anodes in many dozens of marinas over the last couple of decades and my experience is that the "hot marina" is largely a wive's tale and one that boat owners like to cite as the cause of their rapid anode depletion. In most situations, rapid anode depletion is caused by an issue aboard the boat in question.
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Old 13-01-2018, 15:12   #25
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Re: I have excessive zinc anode replacements

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I have earned my living installing anodes in many dozens of marinas over the last couple of decades and my experience is that the "hot marina" is largely a wive's tale and one that boat owners like to cite as the cause of their rapid anode depletion. In most situations, rapid anode depletion is caused by an issue aboard the boat in question.
I don't know about the hot marina likelihood, but I have had a hot neighbor boat that caused me issues.
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Old 13-01-2018, 15:32   #26
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Re: I have excessive zinc anode replacements

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I don't know about the hot marina likelihood, but I have had a hot neighbor boat that caused me issues.
Yes, that can happen:

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Old 16-01-2018, 11:57   #27
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Re: I have excessive zinc anode replacements

I would have thought diving / swimming in a hot marina a bit chancy, doesn't take much stray current to kill a human in the water, see attached link that also explains how to deal with it
http://www.boatus.com/seaworthy/maga...-explained.asp
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Old 16-01-2018, 12:04   #28
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Re: I have excessive zinc anode replacements

marinas can be hot butnot deadly. hot doesnot mean you gonna die swimming in it. enough electricity to change protons and electrons for changing metals is less than you can feel. you CAN feel electricity loosed from a bare wire in water, fresh or salt.
and yes i MEANT loosed, not lost.
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Old 16-01-2018, 19:19   #29
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Re: I have excessive zinc anode replacements

You can very easily be killed in fresh water, it doesn’t take much.
However for some reason it’s very unlikely to happen in salt.
I don’t mind diving my boat to clean the bottom in salt water, I would be reluctant to do so in fresh
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Old 16-01-2018, 19:51   #30
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Re: I have excessive zinc anode replacements

Since humans are essentially bags of saltwater, the potential difference between you and the surrounding saltwater in your marina is small, and therefore not particularly dangerous. However in freshwater, you (as a bag of saltwater) are the most conductive thing around and therefore much more likely to be shocked by any present electrical current.
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