"Eisboch" wrote in message
...

" JimH" jimhUNDERSCOREosudad@yahooDOTcom wrote in message
. ..

"Eisboch" wrote in message
...

" JimH" jimhUNDERSCOREosudad@yahooDOTcom wrote in message
...

"Eisboch" wrote in message
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" JimH" jimhUNDERSCOREosudad@yahooDOTcom wrote in message
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If you are not regularly connected to shore power, what will a
galvanic isolator do for you?


Eisboch



I don't know. Thus my original question.

If I am not connected to shore power a galvanic isolator offers no
benefit to me?


Decide for yourself:

http://www.newmarpower.com/pdf/Manual-GI-30&50.pdf#search='galvanic%20isolator%20boat'

www.yandina.com/acrobats/GalvOwnManual.pdf

http://www.usps.org/pipermail/psml/2...st/004944.html

http://webconsult.web.aplus.net/boat...isolators.html


Eisboch




Thank you for the links Richard. It looks like I have some additional
reading to do.

I am not an electrical expert and offered my original questions based on
what Dave Pascoe had offered at his site.

Can anyone cut to the chase on this for me or do I have more homework in
my future? ;-)


This stuff can be straightforward and it can also be as mysterious as the
meaning of life.
Obviously, your tab anode is eroding ..... unless the nut was loose and it
fell off.

My understanding (having chased this problem for a year on my Navigator
before finding the problem) is that if your boat is totally isolated from
the shore power's bonding (ground) system, a galvanic isolator won't help
you.
Not being hooked up to shore power should mean you are isolated.

Even with the best of precautions, the anodes will erode. That's what they
are supposed to do. In my experience, it is not uncommon to replace all
the sacrificial anodes once or twice during the course of a season, if
hooked to shore power and in a slip.

The best investment I made, at the suggestion of some seasoned slip
inhabitors, was to buy one of those zinc fish anodes with the stainless
cable and clip attached. I clip it to the boat's bonding system and
adjust the cable so the fish is about a foot above the bottom at low tide.
This significantly reduced the other anode erosion.

Why your tab anode (only) is prematurely eroding is one of the mysteries
of life to me.

Eisboch



Thanks for the quick response Richard.

The OD does not have a tab anode and the other anodes (2) are not showing
signs of corrosion.

What concerns me is the fact that I am losing paint along the leading edges
of my outdrive when I did not see that before. I had previously read that
such an occurrence is a sign of corrosion due to electrical problems/

I will be adding a magnesium tab on the outdrive and take up your suggestion
of the submerged magnesium fish connected to my grounding system. A friend
of mine who had an aluminum hull boat (Marinette) used to dunk one of those
anodes whenever he got into the dock.