Shower Sump Issues

Discussion in 'General Discussion' started by wyrman, Jul 4, 2020.

  1. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    I decided to check the shower sump pump today to make sure it's working as we're taking a week long trip starting next weekend.
    The sump was full, so I pulled the pump and checked for power, had 13 volts.
    I messed around with the float and it started working....... backwards.
    It comes on when the float is in the down, or sump empty position, goes off with the float in the up position. I ordered a new one, but i thought that is weird.
    Maybe I'm missing something.
     
  2. electricaldoctor

    electricaldoctor Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    May 14, 2008
    Thousand Islands, Rockport, Ontario.
    1988 390 EC
    454 Mercruiser Gassers
    Try reversing the 12 volt supply wires to the pump to correct the rotation issue.
     
  3. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    Great idea, I'm on the boat right now so I tried that. No go though. I'm thinking this has been this way since it was installed. I can tell it's not the original.
    Thanks for the suggestion.
     
  4. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    The pump pumps correctly, the float is backwards. Turns on at empty, off at full basically.
     
  5. bahamabreisus

    bahamabreisus Well-Known Member

    Oct 25, 2007
    Hampstead NC
    500 dancer, previous 420,390,300 dancers
    detriot 8v92
    Bad float, not to uncommon
     
  6. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    It took me by surprise. I haven't seen that one before.
     
  7. electricaldoctor

    electricaldoctor Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    May 14, 2008
    Thousand Islands, Rockport, Ontario.
    1988 390 EC
    454 Mercruiser Gassers
    Wrong float? The internal contacts should be mormally open when sitting on the bottom which would close when in the raised position. Can you turn your float over?
     
  8. Jeepers

    Jeepers Member

    215
    Sep 28, 2010
    Atlantic City,NJ
    1989 390ec
    454x2
    I went to a Rule lo-pro automatic. 900 gph and built in float.
     
    wyrman likes this.
  9. aerobat77

    aerobat77 Active Member

    605
    Aug 12, 2014
    germany
    2006 240 DA Sundancer
    5.0 MPI / Bravo III
    running the boat in capsized position should correct the showersump issue
     
    Henry Boyd, JimG and Groucho like this.
  10. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    Nothing comes apart except for the piece over the impeller. I know it's the wrong configuration, turning on when it's empty, and off when it has water. The new one will be here Tuesday, at least it's easy to get to.
     
  11. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    The float actually doesn't care which way it is connected. Basically, the float is a simple switch - it's like touching two wires together or pulling them apart. While typically installed on the positive lead, it could be installed on the negative lead and still function as it's sole purpose is to simply make or break. If the wires "upstream" were backwards, the fuse would blow. Besides, I think you've had the boat long enough where you would have noticed an overflow issue before?

    I've never seen a float fail like that, but I suppose anything is possible! Definitely an odd on odd one you got there, Wyr! Good thinking to check things out - prevention is KEY!
     
    wyrman likes this.
  12. Jeepers

    Jeepers Member

    215
    Sep 28, 2010
    Atlantic City,NJ
    1989 390ec
    454x2
    While you are at it check the thru hull. You can see it under the front sink after you remove the rear cover. Mine was cracked and dripping.
     
    wyrman likes this.
  13. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    I was going to upload a short video but can't here, and can't figure Shutterfly out.
    Damned Photobucket.
     
  14. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    I got the new pump today, it works the correct way.
     
  15. Sublimetime

    Sublimetime Active Member

    847
    Oct 22, 2007
    clifton nj
    420 da
    454
    new pump or new float?
     
  16. wyrman

    wyrman Well-Known Member

    Jul 12, 2012
    Tri-Cities, Wa
    2007 310 Sundancer
    Twin 350's, V drives
    1994 18' Bluewater bowrider
    It's an all on one pump/float.
     

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