what to try next

Discussion in 'General Discussion' started by Fred, Jun 20, 2019.

  1. Fred

    Fred Member

    240
    Oct 3, 2006
    Jersey Shore
    2005 390 Sundancer
    thruster, ST7001 autopilot, tracvision M3, Raymarine Dual E120, 7.3 Kw Kohler
    8.1sHO with V-Drives
    My head system is inoperative. There is no vacuum at the head but my vacuum generator is producing vacuum showing a green light, ready to flush. I proved vacuum at the vg2 by pulling the vacuum switch out which turns the pump on and then will build vacuum again when the switch is replaced shutting down as expected. For that reason I feel the duck bills are ok, am I correct in assuming that? There is no visible clog at the head.
    What would you check next?
     
  2. Express 390

    Express 390 Active Member GOLD Sponsor

    220
    Sep 14, 2018
    South Shore of Long Island NY
    1986 SeaRay 390 EC
    Twin 454 Crusaders inboards 4 blades
    Sounds like you can have a clogged line somewhere between the head and the accumulator tank!
     
  3. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    Have you tried a plunger? Even if you can't see a clog it could help move something along.

    I've also heard of people pushing a garden hose into the system (while on) to flush any obstructions.
     
  4. Fred

    Fred Member

    240
    Oct 3, 2006
    Jersey Shore
    2005 390 Sundancer
    thruster, ST7001 autopilot, tracvision M3, Raymarine Dual E120, 7.3 Kw Kohler
    8.1sHO with V-Drives
    I'm thinking the same thing but so far I have used a plunger and not been able to clear it.
     
  5. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    So you do have standing water in the bowl and down into the lines? If not the plunger likely wont be effective. Though if you do have standing water the garden hose idea would be less than ideal :)
     
  6. 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
    Sounds like women have been using the head :(
     
    Chris-380 and Express 390 like this.
  7. 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
    The suction on the other side of the clog could be working against the plunger. Had similar issue but clog was close to the bowl was. Tried plunger with no luck as the suction on the other side was holding it in place. Fortunately (or unfortunately) was able to reach a hand in there to remove it. As soon as it moved a bit the suction caught it and pulled it through. Not sure how but if you are able to break the suction in the line you may be able to use a plunger?
     
  8. Phasma

    Phasma Phasma2128 PLATINUM Sponsor

    396
    Sep 17, 2016
    West Michigan
    2003 360 Sundancer
    Mercruiser 8.1s Horizon
    My understanding is to never use a plunger. It’s possible to invert your duck valves....or so I’ve been told
     
  9. Express 390

    Express 390 Active Member GOLD Sponsor

    220
    Sep 14, 2018
    South Shore of Long Island NY
    1986 SeaRay 390 EC
    Twin 454 Crusaders inboards 4 blades
    If you can't eat it , You can't put it in ....! lol;)
     
  10. Fred

    Fred Member

    240
    Oct 3, 2006
    Jersey Shore
    2005 390 Sundancer
    thruster, ST7001 autopilot, tracvision M3, Raymarine Dual E120, 7.3 Kw Kohler
    8.1sHO with V-Drives
    I don't have standing water but I'm sure I can create that scenario. I can release the vacuum at the accumulator tank and plunge and I have also tried this with slight success. When I re introduced the vacuum I then had a slight vacuum at the head but that soon fully clogged again.
    I have a plastic fish tape I can try from the head down if that is even possible. I don't know.
     
  11. Express 390

    Express 390 Active Member GOLD Sponsor

    220
    Sep 14, 2018
    South Shore of Long Island NY
    1986 SeaRay 390 EC
    Twin 454 Crusaders inboards 4 blades
    I've seen where the paper and what ever was like a rock !
    I would try pulling the hose off the head ( a thankless job ) and with a wet vac try and remove it in that direction. You would first have to drop what ever vacuum is on the system
     
    Last edited: Jun 21, 2019
  12. Sublimetime

    Sublimetime Active Member

    673
    Oct 22, 2007
    clifton nj
    420 da
    454
    Disconnect line at front of vacuum pump and then try shopvac at the head to reverse the obstruction.
     
    PMC likes this.
  13. Steve S

    Steve S Active Member GOLD Sponsor

    965
    Jun 5, 2007
    Northern IL.
    2000 400 Sedan Bridge with twin CAT 3116's

    2000 340 Sundancer - SOLD!
    210 Monaco 1987 - SOLD!
    Twin Caterpillar 3116's 350 HP straight drives
    758E1F2C-8E13-4DCE-AC41-332D3E286AF6.png I have successfully used this in my 340. But I also got a hose valve that was right before the attachment. I turned on the water from the dock pedestal with the valve closed. Turned on the vacuflush. Then stepped on the toilet flush to open the bowl, inserted the rubber attachment and then turned on the hose valve. The rubber attachment expanded, blocked the bowl and pushed the clog free. Only kept the water on for a few seconds as not to over pressurize anything. Worked well.
     
  14. Fred

    Fred Member

    240
    Oct 3, 2006
    Jersey Shore
    2005 390 Sundancer
    thruster, ST7001 autopilot, tracvision M3, Raymarine Dual E120, 7.3 Kw Kohler
    8.1sHO with V-Drives
    To follow up I cleared the clog today. I had to remove the 90 degree pipe that goes to the vacuum tank. I found it totally clogged with paper. There was no way this would ever dislodge without taking it apart and if it did it would have surely clogged the duck valves.

    I think I will stop using West Marine paper as it appears to be thicker than the Scott's we use at home. I'm going for the Sealand stuff from now on.
     
    Chris-380 likes this.
  15. 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 You may also want to consider establishing a no burrito policy when cruising as a preventative step.
     
    Captn TJ and Chris-380 like this.
  16. NotHerDecision

    NotHerDecision Well-Known Member PLATINUM Sponsor

    Jun 28, 2016
    Houston, Texas
    2001 Sea Ray 460 Sundancer
    2014 Seadoo 155 LTD
    2105 Seadoo 130 SE
    2013 Mercury Dinghy
    Cummins 6CTA 8.3L
    We use Scott’s rv and marine paper from Walmart. Works like a charm.
     

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