Water leaking into the bilge at rear of the engine

Discussion in 'Gas Engines/Drives/Transmissions/Props' started by emckissack@hotmail.com, Oct 15, 2017.

  1. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    that would eliminate and hoses or exaust system issues.I would pull the drive to check the below for water before putting it back in . The shift cable can be visually inspected for rot ,tears, etc.
     
  2. stephenm27

    stephenm27 Member

    184
    Nov 3, 2009
    Milton, GA
    2009 310 Sundancer
    350 MAG Mercs/B3 x 2 (Axius Premier)
    Is the boat run in salt water? If so, you’ll typically see some signs of corrosion on the steering lever itself if your upper swivel pin seal is in fact leaking. I watched your videos, and from the quick glimpses of the upper area, I didn’t see the tell-tale signs of water entering that high up on the transom shield. Unless you routinely fresh-water rinse this area after use, you’d see evidence of salt water. That’s a good thing that you don’t...

    I had this issue on my boat and had both motors pulled to fix/replace with new transom assemblies (parts are cheap compared to labor). The P.O. used the boat in salt which only accelerates destruction of the seal.
     
  3. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    So was on the boat this weekend and did not see any more leaking from the rear of the engine. Hmm but did have water intrusion overnight while moored that came up from the screws that hold the metal stairs support to the bottom of the lower deck in the bathroom sump pump area. Water is not coming from the sump pump but is coming up through the screws holding the mounting bracket for the stairs. I know water is not coming from the bilge because I used wax to make a barrier between the motor /bilge area and the forward bilge area where the gas’s tank is. I hope that makes sense. Anyway. Water was coming up through the screws but there was no water in the engine part of the bilge. The only holes in the boat that dip below the water line from the gas tank forward is the front hook eye at the front of the boat. It is low and close to the water line and when there is someone in the front of the boat, it will go underwater. I need to get in there and look at the back side of the eye but don’t really know where to start tearin out the furniture up there. Where should I start? Do I start up high where the mirror is r can I get to it bu just starting where the table is stored? Any help is appreciated.
     
  4. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    Image 2017-11-12 12-59-44.png under stairs.png Image 2017-11-12 12-51-47.png Image 2017-11-12 12-51-47.png
    I wonder if I fiberglass this area, I can keep water from making it in the front of the boat?? Are all other 240's sealed where mine is not?
     
    Last edited: Nov 12, 2017
  5. SloBurn

    SloBurn Member

    756
    May 30, 2013
    Greenwood Lake, NY
    1994 270 Sundancer. 7.4L Merc. Tow with a 2006 Dodge RAM Hemi
    340 HP Merc 454 c.i.
    10 year old bellows? Time to replace, even if not the source of the leak.
     
  6. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    I will change that out in the next few months while the boat is down for the winter.
    Does anyone know what is under the lower sump area where those screws for the steps screw down into? I seem to be able to pull water up through one of them when using a wet/dry vac to clean the area. Not sure how to do it out or is it able to dry on its own.
     
  7. Darylle

    Darylle Member

    53
    Jan 21, 2011
    Australia
    1994 230 DA '03 f250
    5.0 mercruiser alpha1
    Hi there
    I had a similar leak at the transom and unfortunately it turned out to be the transom seal that had lost its shape and "flattened out" I ended up pulling the motor and replaced the transom assembly, whilst in there I noticed there was a void at the lowest point of the transom assembly where water can enter and cannot get out and potentially rotting the transom itself.
     
  8. Royal Lichter

    Royal Lichter Member

    63
    Jan 22, 2018
    2005 Sea Ray Sundancer 260
    Single MerCruiser Mag 350 MPI w/ Bravo III
    Had a very similar leak. Was confusing me to no end as I had just recently done gimbal bearing, boots, bellows, shift cable, trim senders, etc... Was not a lot of water just a tiny bit, the bilge pump kicked on infrequently and took care of it. When I decommissioned the boat and began digging into maintenance a few weeks ago it turns out my transom assembly needs to be replaced - some gasket is bad and it is extremely corroded. Also steering arm totally corroded. Boat was priorly in salt water.

    Anyways, just some thoughts. Good luck.
     
  9. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    Most likely because the seal went bad from lack of the grease fitting. It is easily installed to prevent this
     
  10. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    Do you mind explaining this in a bit more detail?
    Thanks
     
  11. aerobat77

    aerobat77 Member

    323
    Aug 12, 2014
    germany
    2006 240 DA Sundancer
    5.0 MPI / Bravo III
    the area between the lower sump floor and the true vee shaped hull is foamed on the 240 .
     
  12. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    So I took the boat out yesterday and still have a leak somewhere. I suppose it must be coming from the transom because I can’t think of anywhere else salt water can be getting inside. Anyone have an idea on what it may cost to pull the transom and have all seals, bellows replaced that might be the problem by a repair shop? If I decided to do it myself, how hard would it be and what specialized tools would I need to get to make easier to do.
     
  13. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    So the saga continues.. I think I tracked down where the water is coming from. the garboard plug looks like it was letting water get in. so far I have resealed the front hook eye and now the the garboard plug. So hopefully next weekend, I can get her in the water to see if everything stays dry. Fingers crossed.
     
    Laketime likes this.
  14. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    OK, So I am going to drop the boat off at the marina to have them try to find the leak. I was able to track down water trickling down the inside of the rear transom, in the center, which at first made me think it was leaking from around the plug. So I am assuming it is coming from the transom area but not sure if it a bellows problem or the transom seal. When I saw the water trickling down from above the plug, the engine was off, if the matters. I am trying to brace myself for the worst case scenario of it being the transom seal. Can anyone give me some indication of the cost for pulling the engine and replacing the seal? I can start to get my wallet ready to loose some weight.
     
  15. eweise

    eweise Member PLATINUM Sponsor

    453
    Aug 23, 2013
    Jacksonville, FL
    2005 Sea Ray 280 Sundancer
    Twin 4.3L 220 HP, Alpha 1 Drives, 5E Genny, AC
    It should only take about 4 to 5 hours to remove one engine.
     
  16. emckissack@hotmail.com

    emckissack@hotmail.com Member

    112
    May 21, 2016
    Pensacola
    240 Sundancer 2007
    5.0 Bravo 3
    Is that just to remove or remove and replace?
     
  17. LG111

    LG111 Active Member

    330
    Jan 4, 2015
    NW
    410
    8.1
    I had a transom seal leak years ago on twin engine outdrives set up. I ran a bead of 5200 around the outside drive plate. Using blue masking tape to keep a clean line. Worked perfect. I know the guy that now owns that boat and 10 years later still no leak. It's also 24/7 in the water.

    Hope that helps and saves you a few boat bucks!
     
  18. eweise

    eweise Member PLATINUM Sponsor

    453
    Aug 23, 2013
    Jacksonville, FL
    2005 Sea Ray 280 Sundancer
    Twin 4.3L 220 HP, Alpha 1 Drives, 5E Genny, AC
    Remove.
     
  19. Loyd Dinneen

    Loyd Dinneen Member

    163
    Jul 29, 2017
    Las Vegas
    1977 Sea ray 240 SDA cruiser w/ twin 470 mercs.
    Twin 470 Mercruisers
    I agree that I think it is probably a shift cable bellows if left unattended will sink your boat and will not show up on muffs only in the water.
     
  20. Brite Idea

    Brite Idea Member

    117
    Nov 5, 2011
    Long Island, New York
    270 Sundancer 2000
    twin 4.3 TBI Merecrusier Alpha Gen II counter rotating drives
    Did you ever solve this problem?
     

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