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Need for shaft zincs on Ocean Yachts

Discussion in 'Ocean Yacht' started by Anthony Kaduk, Jan 28, 2018.

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  1. Anthony Kaduk, Jan 28, 2018
    #1
    Anthony Kaduk

    Anthony Kaduk New Member

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    Grosse Ile, Mi
    I am on my 3rd Ocean Yachts (38, 45, 52) and none had shaft zincs. I am planning to take the boat to the coast and salt water. Should I be adding shaft zincs?
  2. Capt Ralph, Jan 28, 2018
    #2
    Capt Ralph

    Capt Ralph Senior Member

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    I'm not Ocean Yacht heavy.
    Tell us about the rest of your bonding systems.

    Zinc plates on the stern? Rudders, struts & tabs?
    Are you using alloy or mag zincs now? Changes may have to be made here going to salt water.
    Shaft brushes?
    All green wires good to your thru hull fittings?
  3. Anthony Kaduk, Jan 28, 2018
    #3
    Anthony Kaduk

    Anthony Kaduk New Member

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    Standard Ocean Yacht system. Two mag zincs on the transom, all thru hulls connected via bonding system. Nothing on struts, tabs, rudders and no shaft brushes; but I believe all of these are also connected via bonding system. Ocean Yachts were mostly sold for salt water usage so my assumption has been that they were adequately set up. I am a fresh water boater and am just double checking.
  4. Capt Ralph, Jan 28, 2018
    #4
    Capt Ralph

    Capt Ralph Senior Member

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    You may want to consider a softer zinc and shaft brushes.
    The battle is not entirely within your own ship, but that guy in the next slip.

    Then come on down. Don't forget the Margareta mix for your salt.
  5. Just Cruisin, Jan 29, 2018
    #5
    Just Cruisin

    Just Cruisin Member

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    I have a 53 SS in the Chesapeake and you are going to need to get prepared.
    Make sure you have Galvanic Isolator installed for one thing. Next, you will need zincs on your shafts(2 per shaft) and shaft brushes won't hurt. Get your bonding system in top notch condition. Some put aluminum anodes on if you are in brackish water. I would call ahead to a local marina in the area you are going to get a recommendation on the correct anodes. Plan on having the bottom cleaned via a diver once a month when weather warms and all anodes changed twice a year.
    You should put prop speed on all shafts, rudders and props. Check for any signs of corrosion on underwater gear and have it fixed prior to trip. And good luck with your trip.
  6. Anthony Kaduk, Jan 29, 2018
    #6
    Anthony Kaduk

    Anthony Kaduk New Member

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    Thanks for the responses. Looks like I have a little work to do.
  7. Capt J, Jan 29, 2018
    #7
    Capt J

    Capt J Senior Member

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    You DO NOT want to over-zinc a boat. It creates corrosion if there is too much zinc. Add shaft brushes and tie them into your bonding system and leave things the way Ocean intended them. Change to Zincs. A galvanic isolator is a good idea.
    SplashFl likes this.
  8. Doug Roszelle, Dec 1, 2023
    #8
    Doug Roszelle

    Doug Roszelle New Member

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    I am a new Ocean Yacht owner (43’) second haulout. I noticed electrolysis on the port rudder and the telltale pinkish color on both port struts. I took a look at bonding in that area under back deck. I noticed dead ended wires (including but not limited to the port rudder) decided to do a full through continuity test by making a 45 foot jumper and the results were 50 percent failure rate of bonding on thru hull fittings. I am now doing review on the hidden areas to evaluate the extent of poor bonding conditions throughout. A extensive upgrade is due and I am in discussion with some of my acquaintances to get a handle on it and whether rudder and struts will need to be replaced. I’ve rebuilt three Eggharbors and it would do any boat inspection of the bonding system good.