Can't yet find the leak

Discussion in 'Mechanic Recommendation Forum' started by Lorenzo 0624, Dec 16, 2017.

  1. Lorenzo 0624

    Lorenzo 0624 New Member

    3
    May 30, 2016
    South Florida
    1996 Sea Ray 440 Express Bridge
    2 CAT 350
    Greetings... I was hoping I may find some insight from fellow Searay owners with regard to a small leak in the engine room of my 1996 SeaRay Express Bridge 440. In between the two engines there is a 3 inch raised platform that extends Aft. In forward section of this platform I sprung a leak. It is a very small squirter with some pressure. I had a diver go down and check out the hull with no visable clues from there. I'm about to haul it out but most are still scratching their heads? Any ideas for me? Thank you in advance.
     
  2. Quint4

    Quint4 Well-Known Member TECHNICAL Contributor

    Oct 6, 2006
    S.W. Ohio
    330 Sport Bridge
    5.7 MPI 350 Merc Bluewaters
    Pictures would help immensely.
     
  3. rcknecht

    rcknecht Active Member

    Mar 23, 2009
    toms river,nj
    340 Sundancer 2001
    T 454 MPI
    dripless shaft seals
     
  4. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Unlikely. He is talking about the front of the raised platform between the engines. We definitely need a few pictures to help him sort it out.

    To have that platform leak means the water is coming through the stringers or underneath. I would drill an inspection hole in the platform to see what it going on in there. Start with a quarter inch bit just in case there is a problem under the boat.
     
  5. Lorenzo 0624

    Lorenzo 0624 New Member

    3
    May 30, 2016
    South Florida
    1996 Sea Ray 440 Express Bridge
    2 CAT 350
    I patched it with some clay patch and it’s holding. But....
     

    Attached Files:

  6. PlayDate

    PlayDate Well-Known Member SILVER Sponsor

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    You are going to have to an drill an inspection hole in the top of the platform and see what is going on in there. I would expect to find it full of water. What I have done is drill a 3" or 4" hole with a hole saw and then pump the water out with a hand pump or small bilge pump. Once the water is out....you have a much better view of finding out where it might be coming from.

    I'm speculating that you may have a problem with a nearby thru hull fitting that is leaking in the hull (since the leak is above the water next to it and appears to have pressure behind it).

    Once you solve it, cover the hole with a West Marine inspection plate cover.
     
    rcknecht likes this.
  7. rcknecht

    rcknecht Active Member

    Mar 23, 2009
    toms river,nj
    340 Sundancer 2001
    T 454 MPI
    When you access the water, check to see if it is salty or fresh water...
     

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