water between the double hull

Discussion in 'Ask a Sea Ray Employee...(No Longer Active)' started by gordovip24, Apr 23, 2009.

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  1. gordovip24

    gordovip24 New Member

    41
    Aug 9, 2008
    Pasadena, MD
    1986 390EC
    T-454 FWC Mercruisers
    how can water get between the double hull on a 86 39' ec
    Is there a cut away that we can look at.
    There was a water problem in the anchor locker and with the sky light in the bathroom but that has been fixed.
    I noticed a weep hole in the mid floor locker and that is were the water is coming out of...up from the bottom when the boat sloshes with the waves.
    :smt021
     
  2. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    THis boat does not have a double hull. You do have a false floor in the bottom of the storage lockers and you have water trapped between the hull and that false floor.

    You will need to saw a hole in the floor justy ahead of the water tank with a hole saw....about 3" is good. Then break away a little of the foam under the plywood and vacuum the water out of the area between the hull and floor with a shop vac.

    Water can come from most anwhere and end up here.......anchor locker leaking, rail stanchions leaking, fixed ports leaking, bilge sumps in the engine room leaking, etc. Get the water out and see if it returns, but this is going to take several sweeks of vacuuming every few days to remove water trapped in the closed cell foam that isn't supposed to hold water but does.
     
  3. gordovip24

    gordovip24 New Member

    41
    Aug 9, 2008
    Pasadena, MD
    1986 390EC
    T-454 FWC Mercruisers
    This small hole about the size of a small screw, is forward of the salon storage bin before the shower sump. I put a small amount of plummers putty in the hole, (it did stop).as a temporary measure.
    I thank you for your response Frank.:smt038
     
  4. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    You still have water trapped below the floor. As the level rises, it will find its way out other screw holes further aft. Try removing some of the screws holding the aluminum brackets to the floor and see what happens.
     
  5. gordovip24

    gordovip24 New Member

    41
    Aug 9, 2008
    Pasadena, MD
    1986 390EC
    T-454 FWC Mercruisers
    Thanks Frank I'll try it
     
  6. steppinstone

    steppinstone New Member

    34
    Oct 8, 2009
    Delaware/Maryland
    1989 390 EC
    Twin 454
    I have an 89 390Ec which I recently purchased. I have a problem with water in the area I think being described in this thread. The area forward of the fresh water tank, aft of the shower sump, remains wet even after I have pumped it out and dried it. It is not seawater so I assume it is coming in from various locations up top such as windshield seals, rail mounts, etc. The confusing part is there seems to be two parallel stringers, one on either side of the freshwater tank and running the full length of the boat. I can not locate any drains through these stringers so I can not determine how fresh/rain water incursion makes it to the center area where the freshwater tank resides. I have not checked the area beneath the floor in the storage area so I do not know what the status is in this area. I will do that next. I also have a small area at the base of the sink in the head which shows some area of water as well. This could be a trail to the water incursion but again I'm not sure how it is making it past the main stringers. Any help would be greatly appreciated.
     

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