Seacocks ?? Open or Closed ??

Discussion in 'General Discussion' started by Skip Boyer, Dec 5, 2019.

  1. Skip Boyer

    Skip Boyer Member

    68
    Sep 24, 2015
    North Carolina
    1998 500DA Sundancer, 1999 Maxum 2800, 1998 270DA, FFG 7 Oliver Hazard Perry
    Twin Detroit 6V92TA
    Good morning all. I woke up on the boat Monday morning, (7am) grabbed a cup of coffee and went up on deck to enjoy the morning......to my surprise there was such a chatter of noise on the docks........what could this be i wondered ??.......well my neighbors sport fisher ( i think she's a 55 footer ) was sitting on the bottom !!! Not a good day ! When i went to bed after Sunday night football game she was still up. Not that i went out to look but at least enough that i didn't take notice of anything going amiss. After she was floated one of the divers said that a sea cock hose had broken off......of coarse the valves had been left open. My guestimation....4" or 6" seacock would probably allow at least in the neighborhood of 5 thousand gph of sea water to enter the bilge. Now the owners had been on the vessel and had taken her out the previous week. So my question is.....How often do any of you close your sea cocks ? After ever trip ? Never ? ????? Just as a side note (confession) I rarely ever closed mine (unless it was for maintenance reasons) until now. Now the are closed and will only be opened when the engines are running.
     
  2. FastMarkA

    FastMarkA Member

    280
    Jul 12, 2010
    Chicago
    2015 Sunseeker Portofino 40
    Volvo Penta D6-330
    I never do, but hose inspection (and replacement) is very much a part of routine maintenance. How old is (was?) the boat?
     
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  3. PlayDate

    PlayDate Well-Known Member

    Dec 25, 2006
    Washington DC
    1994 370 Express Cruiser
    454 Mercruisers
    Mine are super easy to get to. So I pop the hatch and go below to check for any unusual smells. Switch on the fuel tanks and open the seacocks for the generator, and both engines. Reverse when I come back to the slip.

    The only one that stays open all season is the HVAC. Maybe it is just me but I think cycling the seacocks on a regular basis is a good idea.
     
  4. Skip Boyer

    Skip Boyer Member

    68
    Sep 24, 2015
    North Carolina
    1998 500DA Sundancer, 1999 Maxum 2800, 1998 270DA, FFG 7 Oliver Hazard Perry
    Twin Detroit 6V92TA
    Boat is probably no more than 5 or 6 years old, my guess. Appears to be well cared for. Owner had just recently made the trip down from NJ to winter the boat here. I can not attest to anything as far as maintenance schedule or what actually caused her to go down so quickly. I do find it amazing that she went down so quickly. Less than 8 hours. May have happened even more quickly. I was told that somebody was out on the dock about 5 am and she was still up. That would make it less than 2 hours. When i came out at around 7-7:15, the dock master already had Sea Tow on site.
     
  5. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    IMG_4230.JPG We never closed ours but did excercise them and inspect on a regular schedule. On a 32 Open they are not easy to reach. Poor design in my opinion.
     
  6. spikedaddy99

    spikedaddy99 Well-Known Member GOLD Sponsor

    Jun 11, 2008
    Prentice, Wi
    2005 500 DB
    QSM-11
    Never close them. But this scares me. I leave the A/C's on all season (dehumidify unless it's really hot...which is about a week up here :)) so no reason to close the engines and genny. I guess this is what insurance is for!!
     
    Chris-380 likes this.
  7. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders
    Don't "assume" insurance will pay if your boat sinks due to a failed hose. If the adjuster determines that the hose failed due to poor maintenance the insurance may decide to deny the claim. Just happened to a friend of mine this summer. Check your policy to read the exclusions. I also never close my seacocks but my hose are replaced every 5-6 years and double clamped.
     
  8. spikedaddy99

    spikedaddy99 Well-Known Member GOLD Sponsor

    Jun 11, 2008
    Prentice, Wi
    2005 500 DB
    QSM-11
    Wow, really? However, it will never be for poor maintenance for me. I stay on top of that.
     
  9. Korkie

    Korkie Active Member GOLD Sponsor

    628
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
    Boat is normally stored on lift, so usually left open. If we take her somewhere and are going to be moored for a while, I close them and put one or the other ignition keys on one of the handles. Neighbor closed his once and forgot to open it before starting up and fried 2 impellers. Was too late after his alarms started going off. The key thing is to prevent this from happening. PM is definitely the ticket though.
     
  10. b_arrington

    b_arrington Well-Known Member GOLD Sponsor

    Feb 21, 2007
    Setauket, NY
    2018 Back Cove 34
    Cummins QSB 6.7 480
    I did the same as your neighbor. Cleaned out the AC strainer because it was cruddy and checked the main strainer while I was at it. But forgot to reopen the main sea cock. Ran the engine at idle for 10-15 minuted before I got an alarm - which was way too late to save the impeller. Not fun waiting for Sea Tow with 20 people on board.

    I usually leave the sea cocks open because I'm petrified I'll forget to open them. My electric hatch takes a long time to open, too.
     
  11. Skip Boyer

    Skip Boyer Member

    68
    Sep 24, 2015
    North Carolina
    1998 500DA Sundancer, 1999 Maxum 2800, 1998 270DA, FFG 7 Oliver Hazard Perry
    Twin Detroit 6V92TA
    Ill be keeping mine closed when not in use. And doing like Korkie noted, leave the keys at the valves. Makes sense to me. Not willing to take a chance on an incident or an insurance adjusters judgment.
     
  12. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    Those hoses are pretty sturdy. Hard to imagine one would split after just 5 or 6 years.
     
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  13. b_arrington

    b_arrington Well-Known Member GOLD Sponsor

    Feb 21, 2007
    Setauket, NY
    2018 Back Cove 34
    Cummins QSB 6.7 480
    Right. They are wire reinforced. Thick. Hard to cut. Hard to wrestle into position. Very sturdy.
     
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  14. Carpediem44DB

    Carpediem44DB Well-Known Member PLATINUM Sponsor

    647
    Aug 18, 2015
    Sanfransico Bay area
    2006 44 DB Sedan Bridge Raymarine gs165 w Quantum HD Radar
    Achilles 350 Dink
    Nick Jackson Davit
    Cummins QSC 8.3 500 HD
    I second that. I can't imagine the reinforced rubber hose breaking off. Perhaps the barbed nipple corroded and broke off in five or six years if it had a bad bonding wire perhaps. I just changed my 2.5 inch intake hoses that were original 13 years old. It was time but they were not in any danger of breaking off with out some considerable help. I learned to exercise my valves regularly as they were stuck open when I bought the boat. Neither of my surveyors checked their operation. They each said it was the others job! Took considerable effort to get them opened which ended up with my needing to replace the handles. I only close them for MX as they are quite a crawl to get to on the 44 DB. My hoses though are double clamped and will be replaced every five years.
    CD
     
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  15. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    I changed mine last Spring just to be safe. At 17 years old the old ones didn’t look like they were in any danger of rupturing.
     
  16. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    I use a heat gun on mine to get them off so I can winterize the motors, then to get them back on again and it’s still a wrestling match.
     
  17. FootballFan

    FootballFan Well-Known Member

    Jun 20, 2012
    Florida
    Marquis 59
    MTU Series 60
    Think about this post as a reminder wake up call. Talked to the guy that takes care of our boat today - asked how often is he looking at the hoses off the through hulls.

    Every year when the oil change occurs, I have our mechanic do an overall check of hoses. Nothing wrong with monthly inspection.
     
  18. Skip Boyer

    Skip Boyer Member

    68
    Sep 24, 2015
    North Carolina
    1998 500DA Sundancer, 1999 Maxum 2800, 1998 270DA, FFG 7 Oliver Hazard Perry
    Twin Detroit 6V92TA
    UPDATE; So i just spoke with the owner as to what happened to bring the boat down so fast........it seems that this vessel uses some sort of flange to flange set up that uses a "V" or pinch clamp to hold them together. Looks like the bolt broken and allowed the two flanges to simply fall apart thus leaving a 4 in hole in the bottom. From his explanation im thinking this set up is similar to what heavy equipment uses on turbo/tube connections. Makes more sense how she would suffer such a mishap. These style clamps can be over torqued and over time vibration could weaken the bolt to a breaking point.
     
  19. Irie308

    Irie308 Well-Known Member SILVER Sponsor

    May 28, 2013
    CT
    2004 420 Sedan Bridge, GHS Hydraulic Lift
    Dual Raymarine E120W
    AB Mares 10 VSX with 30 hp Tohatsu
    Cummins 450C 8.3 L Turbocharged
    When we purchased our boat the surveyer recommended changing out raw water pickup hoses. They were in less than good shape. I went through and checked all of the hoses. This was the bottom side of our starboard exhaust bypass hose. It came apart while I was trying to remove it. Don’t think I would have seen it if I couldn’t fit behind the generator. Doubt any paid maintenance personal would either. 73E50A96-5C85-4743-A789-00C831FD5D24.jpeg
     
  20. DWABoat

    DWABoat Active Member

    178
    Aug 13, 2019
    S Louisiana
    2001 280 Sundancer
    1989 220CC Cuddy Cabin
    Twin 4.3 w/Alpha Ones
    5.7 Mercruiser Alpha One
    The boat insurer for my place of employment, the insurance company made me sign a document certifying we would close all six sea cocks when the boat is left unattended in the water.

    For my personal boat, there was no mention, although I did list in the application it would be on a trailer.
     
    Captn TJ likes this.

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