[Public-list] Re: Boat eating zincs

[Fureyb1 at aol.com]

boat was at a mooring off the yacht club in Cape May harbor-harbor has a  LOT 
of wake but that alone would'nt eat the zinc. a guy dove on my boat and  
replaced the shaft zinc around mid July & when I hauled the boat in early  
November, that zinc had some corrosion also-just to confuse matters further, the  
reason the guy was diving was his zinc had corroded too this was a J-35 moored  
about ten boat lengthes from mine. Whether he was causing it or My boat was  
anyone's guess-also, a boat right next to mine was fine-the same guy checked his 
 zincs.
 
So, most of the time, my boat was at the mooring with the master battery  
switch off.  I did sail & motor quite a bit last summer. Could aq  faulty ground 
cause 12 volts to go down the prop shaft and attack the zinc? If  so, how do I 
check that with the boat out of the water- I did have shore power  hooked to 
a battery charger quite a bit when the boat was at the  dock.

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