First boat - can someone tell me what these are for?

Discussion in 'Boat Design' started by Jmlb444, Sep 27, 2018.

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  1. Jmlb444
    Joined: Sep 2018
    Posts: 2
    Likes: 0, Points: 1
    Location: Northhighlands ca

    Jmlb444 New Member

    This is my first boat the deck was rotten after we tore it out I find these I attached the pics can someone tell me what they are for?
     

    Attached Files:

    Jmlb444, Sep 27, 2018
    #1
  2. Blueknarr
    Joined: Aug 2017
    Posts: 1,497
    Likes: 445, Points: 83
    Location: Colorado

    Blueknarr Senior Member

    Welcome to the forum

    It would be helpful to know type of boat and engine.

    Most lickly thru hulls used to bring raw cooling water to engine
    Sometimes used to send wastewater overboard. Highly discouraged unless way out to sea.

    1538083758819401518269.jpg
    You can see one with smaller hose attached on my current project. The raw water flows into a heat exchanger (radiator) then is injected into the large exhaust pipe to prevent it from getting hot enough to ignite fiberglass resin.
     
    Blueknarr, Sep 27, 2018
    #2
  3. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    That looks like the through hull fitting for a depthsounder or speedometer.
     
    gonzo, Sep 28, 2018
    #3

  5. Jmlb444
    Joined: Sep 2018
    Posts: 2
    Likes: 0, Points: 1
    Location: Northhighlands ca

    Jmlb444 New Member

    It's a 24 ft 1975 Bayliner Saratoga with a Chevy 350 5.7l
     
    Jmlb444, Sep 28, 2018
    #4
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