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Bait tank installation

Discussion in 'Carver Yacht' started by Jnicholas, Sep 9, 2016.

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  1. Jnicholas, Sep 9, 2016
    #1
    Jnicholas

    Jnicholas Member

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    I have a couple of questions related to a bait tank installation on my Carver 450 voyager. Been considering pulling the water supply line from the generator raw water supply. I do not see needing the bait tank and generator at the same time so not worried about starving the generator for cooling.

    So my first question is running at speed with generator through hull open can water pressure enter the non running generator and damage it

    next question is I am considering pulling power for the pump from the generator starting battery. If I run this battery down does the engine charging system charge it or does it only charge from shore power or the generator operation?

    Trying to eliminate another hole in the boat and another battery in the aft end of engine room

    Thanks as always
  2. Capt Fred, Sep 10, 2016
    #2
    Capt Fred

    Capt Fred Senior Member

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    Regarding flooding the genset, I have never seen this happen, the ones I see are mounted higher than the water line. However I tried your idea and it did not work, the genset or bait tank will suck air and degrade the flow of water to your bait. You could put shut off valves in each side but that is a pain to keep the valves in the right configuration. Also if you put in a new through hull, put it as near the center line as possible to reduce the possibility of sucking water in rough seas.

    Starting batteries are not the best battery for this application, the battery should be a deep cycle to supply the bait pump for long periods of time. It certainly needs to be recharged in the normal course of your boat operation. It may get the charge from the engine through a diode isolator but no way for me to know. You would have to trace the charging system to know. Tight lines
  3. RER, Sep 10, 2016
    #3
    RER

    RER Senior Member

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    The answer to your first question is no. There is no need to close it. Running a boat with an open thru hull and not running the generator is a non issue. Boats are run all the time without using the generator.

    Do not pull the bait pump supply from the generator thru hull. It will not provide enough flow for both and it will suck air. Use a separate thru hull for each. Nobody likes a lot of different holes in their boat. It's done that way because it is necessary. The only alternative would be a sea chest.

    The answer to your second question is possibly. Many boats use house batteries to start the generator - the same batteries that would power your bait pump. The exception would be if you have a separate dedicated generator starting battery. In either case your house battery bank will be used to power the bait pump.

    To keep the house bank charged requires that you be underway (alternators) or, either running the generator or connected to shore power (battery charger). That said, if you manage your DC draw, a house bank with a couple of healthy 8D's can provide plenty of run time for your bait pump before requiring a charge.
  4. Jnicholas, Sep 10, 2016
    #4
    Jnicholas

    Jnicholas Member

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    Thanks for replies. Appreciate knowing that I've not been hurting generator while underway. Was afraid of answer on through hull. I'll bite the bullet and install. I've seen photos of sea chest systems. That would have been great from the start. Too late now...

    I will have to see if alternator charges generator battery. I do have two 8d batteries for house systems but hesitate to add pump to it. I do like my ice maker and refrigeration! I was planning on upgrading the start battery to dual purpose deep cycle but sounds like a dedicated deep cycle is the way to go. Thanks again
  5. Joe Graceffo, Sep 11, 2016
    #5
    Joe Graceffo

    Joe Graceffo New Member

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    One possibility is to draw water from your toilet through hull (if you have raw water intake for it).
  6. RER, Sep 11, 2016
    #6
    RER

    RER Senior Member

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    Why? That's what the house bank is for. That's where the DC power supply to your bait pump should come from. If you have a dedicated generator start battery leave it alone. You will be able to start your generator to charge your house bank.
  7. Capt J, Sep 11, 2016
    #7
    Capt J

    Capt J Senior Member

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    Ok, the worst thing you can do to a generator is to let it sit and not use it. The best thing for it is to run it (with a load) every single time you run the boat. Also it's better for the boat as you can run battery chargers etc. etc. air conditioning to keep the humidity down and on and on.

    That being said, you need a seperate thru-hull for the bait tank.

    Contrary to what others have posted, running with the generator off can flood the generator (not on your style boat) on some boats.....the fast boats have an issue. I manage a 59' Baia it happened to, prior to me....It also happens on Fountain SC's and other fast boats.

    You should run the bait tank from it's own dedicated breaker on your electrical panel. There should be a breaker marked spare (that you can label and use) or an empty slot.
  8. Jnicholas, Sep 14, 2016
    #8
    Jnicholas

    Jnicholas Member

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    Thanks for info. Have spare breaker. No problem there. I guess I need to find good location for new valve. Thanks for all info