Dripless Shaft Seal

Discussion in 'Winterizing' started by Russ Calasant, Nov 19, 2018.

  1. Russ Calasant

    Russ Calasant Active Member

    Dec 9, 2009
    East Greenwich, RI
    2001 480 DB
    CAT 3196
    What do you all do with them for winter? Should they be disconnected from motor side and capped? What about the cross over? Before or after running antifreeze? And if after why disconnect? Thanks for any info/advice-
  2. Maximus

    Maximus Member

    Jul 28, 2014
    1998 400 sedan bridge
    I’ve never done anything with them. Why would you?
  3. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    Some are self draining.
  4. MonacoMike

    MonacoMike Well-Known Member PLATINUM Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    8.2 Mercs
    85 Sea Ray Monaco 197
    260hp Alpha 1
    Or in heated storage...

    J.Wilt likes this.
  5. Russ Calasant

    Russ Calasant Active Member

    Dec 9, 2009
    East Greenwich, RI
    2001 480 DB
    CAT 3196
    I guess that’s really my question. Last year was first time winterizing so I hired a mechanic to do it and he capped both feeds from the pumps both motor end and hose. I’m not sure why -
  6. rcknecht

    rcknecht Active Member

    Mar 23, 2009
    toms river,nj
    340 Sundancer 2001
    T 454 MPI
    I just run pink through my engines and some drains out the dripless seals. So there is no need to do anything with the hoses...
    JVM225 and Russ Calasant like 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
    Never done anything with them. Pink comes out the bottom of the boat when wintering and they self drain anyway. If in the water maybe disconnect them. Not sure.
  8. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    That’s what I do.
    Just did mine today and made sure pink came out the exhaust and shafts.
    Last edited: Nov 21, 2018
  9. saopm

    saopm Member

    Oct 6, 2010
    North Fork - Long Island, NY
    2007 340 Sundancer
    Mercury 8.1s Inboards
    I’ll tell you what I noticed with mine. I pulled both strainer drain plugs. When one engine runs it will push water out of the off engine strainer drain. Therefore, it seems you need to flush and drain both engines, then run AF through each one. Otherwise, if you already ran AF in one, then try to flush the other, it will pump water through the engine that has AF. I suppose that is why some will pinch off the crossover.
  10. my3sons

    my3sons Well-Known Member SILVER Sponsor

    Feb 24, 2009
    Upstate NY (lake Erie)
    2004 400DB, Onan 9 kw Gen, Highfield RIB,
    Cummins 6CTA
    I pinch off the water line from the engine to the seal with a vise grip. I was amazed how much pink was wasted through the shaft seals the first time I winterized a dripless seal boat. When I have finished, I remove the vise grip and all the pink in the entire motor except for about a quart that is in the bottom of the aftercooler runs out the shaft seals (both because of the cross over) Your motors may be different, the components plumbed differently, etc, which is why I always hesitate to give winterizing advice. But to your questions, I pinch them off so pink is not wasted. Tides seals do not need to be winterized, they self drain but when I remove the vise grips, they get winterized. I would have to cap them off or leave the vise grips on all winter if I wanted the pink to stay in the raw water components. I don’t care if there is no pink in the raw water side after it has pushed out all the water.
    techmitch and Russ Calasant like this.
  11. Russ Calasant

    Russ Calasant Active Member

    Dec 9, 2009
    East Greenwich, RI
    2001 480 DB
    CAT 3196
    Interesting. I did neglect one important piece- my boat stays in the water for winter. This makes a big difference. I removed the seal feed from the port motor and pink shot from the motor, I plugged it. The other end had nothing, air in the line, when pressurizing I could hear gurgling and after release it sounded like it was backfilling. I disconnected the starboard from the motor and no flow from the motor side although what I could see looked clear. The seal side had a light flow of sea water, I capped them both. I had winterized both motors earlier. I’m a bit concerned that by not capping them earlier the raw water pressure on the starboard feed blocked or diluted the antifreeze. Unless I lose power the engine room doesn’t see below 60 degrees with, cameras, mechanical and electronic temp and humidity sensors with remote live monitoring, block heaters, bilge heater and lazzarete heaters all on different feeds. I stay on the board a lot.

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