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TWL: Zinc on wood boats

From: (no name) (no email)
Date: Sat Nov 01 2003 - 02:49:41 EST

  • Next message: Frank Bales: "TWL: Fresh Water"

    Hi All,
      Been reading the thread about zinc on wood boats. Tough question on how to
    do it right and whether to bond everything or not.

      I have found on my 1971 DeFever 55 ft. wood raised pilot house trawler that
    the best answer is to use an Electroguard System. This system was installed
    onboard Sobre El Mar approximately 25 years ago. It uses a small reference
    anode on the hull near the garboard plank, and on the opposite side of the keel
    there are two 6" x 12" zinc plates. There are no shaft or rudder zincs or any
    other zinc on the boat. All through hulls, rudders, shafts etc. are bonded
    into the system.

      The result of this is that I have no problem with electrolysis on this
    boat. One thing I always do is check to make sure the shaft brushes (3 on each
    shaft) are making contact when finished with engines after a run. I just use a
    small piece of emery cloth near the shafts and run it under the brushes a
    couple of times, then flip it over and clean the shaft. Otherwise the salt, dirt,
    oil etc, that tends to be in those areas will cause problems with contact of
    the brushes.

      I think this system is the answer and they are still made and work very
    well.

    Regards,
    Capt. Mike Schachter
    MV Sobre El Mar
    55 ' DeFever 1971 raised pilot house trawler
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