Vacuflush problems!

Discussion in 'General Maintenance/Repair Questions' started by Luckydogs, Jun 24, 2007.

  1. wetbar

    wetbar New Member

    16
    Jun 26, 2007
    What and where are the duckbills

    I have a 1988 Sundancer the the head sucks all the time. I thought this was normal for an older boat. How do I check the duskbills? OR is this normal for a boat my age?

    Thanks fo the help
     
  2. Luckydogs

    Luckydogs New Member

    348
    Mar 5, 2007
    Lake Texoma, Texas
    2003 3870 Express
    Twin 8.1S (hogs)
    Wetbar, the tech advised that the duckbills last approx two years and then get soft and release air, the valves are in the vaccum generator and seems to be an easy job. I went to Sealand website and printed out the manual for my model.
     
  3. wetbar

    wetbar New Member

    16
    Jun 26, 2007
    I cant find Sealand on goggle. What is the complete company name? EDIT - I found it thanks again
     
  4. MLauman

    MLauman Member

    729
    Oct 3, 2006
    Madison, MS
    1997 270 Sundancer
    7.4 Bravo II
    How 'bout The Headmaster ?
     
  5. Hampton

    Hampton Air Defense Dept TECHNICAL Contributor

    Nov 26, 2006
    Panama City, Fl
    2008 44 Sedan Bridge
    Cummins QSC-500's
    Straight Drives
    I'm glad I didn't know about this thread before I sold my 250. The vacu-flush head worked flawlessly for over 10 years, and hopefully still is.
     
  6. gerryb

    gerryb Well-Known Member TECHNICAL Contributor

    Oct 12, 2006
    Somers Point, NJ
    "On Vacation"
    2006 40 Sundancer
    Raymarine E125 & HD Radar + Garmin 5208
    QSB5.9 380 Cummins
    Invention: Duckbill valve
    Year 1998

    Description
    Invention patented by Robert Alfread Bennett on May 18th, 1998. Abstract: A duckbill valve is provided which includes a hollow cylindrical elastomeric body with first and second ends. The first end has walls parabolically tapering to an elongate slit, the slit being surrounded by an upper and lower lip. The second end has a non-uniformly round (e.g. oval) outer wall terminating in an open mouth. When inserted into a perfectly round apertured fitting, the non-uniformly round outer walled elastomeric body is bowed to form-fit the round configuration thereby forcing shut the lips and slit. Upon increased air pressure within the elastomeric body, the slit is forced open. In a second embodiment, the inner wall of the second end may be non-uniformly (e.g. oval) round. Insertion of a round tubular fitting within the non-round inner wall of the elastomeric body also achieves a bowed form-fit configuration which forces shut the lips and slit.
     
  7. Luckydogs

    Luckydogs New Member

    348
    Mar 5, 2007
    Lake Texoma, Texas
    2003 3870 Express
    Twin 8.1S (hogs)
    Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

    Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

    After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

    After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

    Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
     
  8. Luckydogs

    Luckydogs New Member

    348
    Mar 5, 2007
    Lake Texoma, Texas
    2003 3870 Express
    Twin 8.1S (hogs)
    Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

    Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

    After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

    After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

    Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
     
  9. Luckydogs

    Luckydogs New Member

    348
    Mar 5, 2007
    Lake Texoma, Texas
    2003 3870 Express
    Twin 8.1S (hogs)
    Can I have my "Duckbill" shirt now. Just got back from replacing my four duckbills. :smt038

    Wasn't too bad of a job as I don't allow the duece in the boat, except for emergencies. :smt018

    After I replaced the duckbills and reassembled the pump, I gave it the ol' testaroonie.

    After the initial vaccum cycle, the pump cuts off approx. 35-40 seconds in between flushes. Does this sound about right. It is definately an improvement.

    Thanks to Four Suns for the step-by-step how to on a prior post, w/out those directions, I would probably still be there figuring out how to replace the rear valves. :smt017
     
  10. PMvdb395DA

    PMvdb395DA New Member

    Oct 12, 2006
    Netherlands Europe
    360DA '03 6,5 kw kohler generator, AC, etc.
    Yanmar 315Hp diesels
    You want 3 shirts??? :lol: :lol:

    Good job :thumbsup:

    Peter
     
  11. Dave S

    Dave S Well-Known Member TECHNICAL Contributor

    Oct 3, 2006
    Upstate South Carolina
    Boatless
    Boatless
    That sounds correct. Mine takes this long to turn off after a flush.
     
  12. comsnark

    comsnark New Member

    Apr 10, 2007
    NJ Shore
    SeaRay SunSport
    5.7LX
    Hopefully. . that will discourage people from using it!

    (my boat is more of a day boat. . .I tell people to take care of buisness before coming on the boat!)
     
  13. Four Suns

    Four Suns Head Pot Stirrer TECHNICAL Contributor

    Oct 4, 2006
    Williamsburg, VA
    2003 480 DB
    Zodiac ProJet Dinghy
    Yamaha 110vx WaveRunner
    QSM-11 Diesels
    If you really want tip top vacuflush performance, you can also change out the rubber seal on the toilet that the ball moves inside of when you flush. I changed mine out this year and it was a definite improvement on performance.
     
  14. Cuttin' Edge

    Cuttin' Edge New Member

    148
    Jan 14, 2007
    Milwaukee, WI
    The duck bills weren't it....
    Changed and no difference....So I got a spare set now!

    So I then went back to ripping all apart - I was quite p*** at this point Saturday and was not giving up - disconnected all and just kept fishing and, well, now it works...put it all back together - and she seemed to work great...haven't given it a "sea trial" yet - but, in the water tests - it appeared to be good....
     
  15. wetbar

    wetbar New Member

    16
    Jun 26, 2007
    MY vac pump runs all the time. I repalced the duck bills. No luck! When I push the spring at the end of the tank the pump cuts off. So is that it? Do I need to replace the spring or what? What is that part called, just the pressure switch? Can I buy one at west marine or is it special order?
     
  16. gerryb

    gerryb Well-Known Member TECHNICAL Contributor

    Oct 12, 2006
    Somers Point, NJ
    "On Vacation"
    2006 40 Sundancer
    Raymarine E125 & HD Radar + Garmin 5208
    QSB5.9 380 Cummins
    The switch and spring assy controls the vacuum pressure, as I recall. I would check the manual on this as I also had a similar problem 2 years ago and changed the spring setting so that it would create more vaccuum. (BTW, the switch wasn't the problem... let's just say that I ended-up placing a ptouch label on my head mirror with some basic instructions for use...).
     
  17. wetbar

    wetbar New Member

    16
    Jun 26, 2007
    so are you sayingI need change the springs and not the switch or is it all one kit? Where can I but it from?
     
  18. Roger Williams

    Roger Williams New Member

    2
    Jan 26, 2018
    2000 searay sundancer 340
    Mercruiser 7.4
    Your kids were using dental floss? Bottle that shit!
     
  19. AKBASSKING

    AKBASSKING Active Member

    Apr 13, 2008
    SE Alaska Summer/Columbia River winter
    1988 Yacht Fisher
    Twin 375hp Cat 3208 T/A
  20. JimG

    JimG Well-Known Member SILVER Sponsor

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    10 year old thread gentlemen...
     

Share This Page

Show Sidebar