Broken blue seacock

Discussion in 'General Maintenance/Repair Questions' started by skunkman, Dec 9, 2019.

  1. skunkman

    skunkman Member

    422
    May 27, 2014
    Longboat Key
    Looking for 330 Sundancer
    350 twins
    I was out and the emergency bilge pump went off again repeatedly. Lifted the hatch and water was spewing out of a broken blue seacock on the port engine. Part of the seacock is still in the hole. Any thoughts on getting it out. Where can I get a replacement?
     
  2. skunkman

    skunkman Member

    422
    May 27, 2014
    Longboat Key
    Looking for 330 Sundancer
    350 twins
    Am I using the right term - seacock? Its one of those blue plastic valves you can turn
     
  3. Captn TJ

    Captn TJ Active Member

    872
    Sep 19, 2017
    Catawba Island, Oh
    2005 280DA
    Raymarine E80
    5.0 with Bravo 3
    A seacock would be through the hull. If that's the case I'd sure get a fix quickly and pull it.
     
  4. ENstig8or

    ENstig8or Active Member GOLD Sponsor

    175
    Jun 4, 2013
    New Jersey
    2003 Sea Ray 450 Express Bridge.....

    2016 Sea Ray 21 SPX BR
    Cummins 480CE (450)
    Mercruiser 4.3L (21 SPX)
    Sounds like you might be referring to the drain from the engine. I have 2 blue plastic drain fittings on my little boat which has a 4.3 liter Mercruiser. Can you post a picture of it?
     
  5. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    Are you talking about the drain plugs?
    If so, Hardin Marine sells stainless replacements.
     

    Attached Files:

  6. Ididntdoit

    Ididntdoit Well-Known Member

    Dec 5, 2007
    New England & South Florida
    1976 17 Sport
    90hp Etec
    +1 on the hardin stainless replacements - but beware as sometimes the wider "wing nut" design does not clear the sensors on the t-stat housing (I trimmed them instead of removing the sensor and risking breaking it or hurting the housing. as far as removing whats left, I've had luck using an appropriate size phillips lightly tapped in place and backing it out......when they are stuck I use a really small flat sctewdriver, an awl and even dental picks to chip out the pieces - the threads are very coarse so its not that difficult.
     
  7. andy k

    andy k Active Member

    470
    Feb 7, 2009
    Door County, Wisconsin
    1998 3075
    Mercruiser 5.7 w/ Alpha one. Kohler 5kw
    I keep a few spares of the blue caps as I have had two of them break on me over the last 10 years.
     
  8. skunkman

    skunkman Member

    422
    May 27, 2014
    Longboat Key
    Looking for 330 Sundancer
    350 twins
    I ordered the stainless plugs. Thank you. Hard to believe such a cheap part for an important function.
     
    wyrman likes this.
  9. Sublimetime

    Sublimetime Active Member

    843
    Oct 22, 2007
    clifton nj
    420 da
    454
    And use great caution when starting the thread on the new one after you get the old one out, they like to cross thread when starting to screw them in.
     
  10. Spark600

    Spark600 Active Member

    152
    Dec 28, 2013
    Long Island NY
    2008 Sundancer with 496 SeaCore Bravo 3
    Kohler Generator
    Mercury dinghy
    496 SeaCore Bravo 3
    I wanted to get this when my blue plug broke off in the fuel module. but I was worried about the two dissimilar metals with corrosion ( aluminum / stainless steel ) as salt water passes through the fuel module.

    How is the stainless steel holding up against corrosion.

    I now carry extra blue plugs but would like to switch to stainless steel ones and be done with this.

    I drilled out the plastic plug and with a small screwdriver it came right out.
     
  11. Ididntdoit

    Ididntdoit Well-Known Member

    Dec 5, 2007
    New England & South Florida
    1976 17 Sport
    90hp Etec
    I never had a problem - used tef-gel on the threads - the bolts that hold the brackets onto the housing as well as the cover (and fuel line into the cover) and filter housing are all stainless too
     
  12. b_arrington

    b_arrington Well-Known Member GOLD Sponsor

    Feb 21, 2007
    Setauket, NY
    2018 Back Cove 34
    Cummins QSB 6.7 480
    If you still need to get the plug out, you should be able to use an ez-out, aka extractor tool.

    There are a couple of types such as strait flute and spiral. I picked up this set from my local HW store and I've used it on a couple of projects. You should be able to chuck it into a drill and use it on LOW speed to back out the remains of the plug.

    [​IMG]
     
    JVM225 likes this.
  13. techmitch

    techmitch Well-Known Member GOLD Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    They shouldn't be used in a drill on any speed.
     
    Sublimetime and PlayDate like this.
  14. b_arrington

    b_arrington Well-Known Member GOLD Sponsor

    Feb 21, 2007
    Setauket, NY
    2018 Back Cove 34
    Cummins QSB 6.7 480
    Why not? Chuck the properly sized extractor into the drill and engage it in reverse at a very low speed. I've use that successfully on several occasions.

    Although I did just read that the straight extractors (not spiral) work better for softer materials, as they don't expand the material to be removed during the process.
     
  15. techmitch

    techmitch Well-Known Member GOLD Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Because your not supposed to. Period

    "Screw Extractors

    WARNING: Always wear safety goggles to protect your eyes, and wear other appropriate safety items for protection. For hand application use only, do not use in power tools. Always use cutting oil with cutting tools. Do not heat the tool. Always maintain a firm footing and control of the tool. Prior to use, always inspect the tool and discard immediately if damage is suspected."

    https://www.irwin.com/support-services/safety-warnings#15
     
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  16. Sublimetime

    Sublimetime Active Member

    843
    Oct 22, 2007
    clifton nj
    420 da
    454
    If you think you have a problem when a screw breaks off and you have to get it out???? try using one of those extractors in a drill and have IT break off---that will be a real problem, as they are hardened.
     
    techmitch likes this.
  17. sea hare

    sea hare Member

    90
    May 14, 2012
    WI
    2001 fiesta vee 310
    T-merc 5.7 carbed B3
    Ive had a few break in my day... They actually come out pretty easy... I just heat up the tip of a screwdriver and let it melt into the plug... let it cool for a sec and then unscrew it
     
    Blueone likes this.
  18. andy k

    andy k Active Member

    470
    Feb 7, 2009
    Door County, Wisconsin
    1998 3075
    Mercruiser 5.7 w/ Alpha one. Kohler 5kw
    I used this same procedure to get the blue plugs out. They do come out very easy.
     
  19. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    Buy them in 4 packs and keep a few on the boat as spares.
     
  20. skunkman

    skunkman Member

    422
    May 27, 2014
    Longboat Key
    Looking for 330 Sundancer
    350 twins
    I tried to remove it with a screwdriver as described above. I got great torque on the plug but it just disintegrated leaving plastic in the threads. I tried to get the plastic out with a pick but no way. I may have to have it tapped. To get the boat to the marina I was thinking of using a temporary plug - maybe some type of expansion plug. Any other suggestions? Or should I tap it myself. The plug is on the water pump. I don't want to ruin it.
     

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