420/44 DB Owners Club

Discussion in 'Sport Yachts/Yachts' started by Alex F, Jan 21, 2011.

  1. 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
    Here's what you need. https://www.aetnaengineering.com/model-8905r-lcd-tachometer/

    Most here swear by them.
     
  2. 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
    You win Mark.
     
    my3sons likes this.
  3. Tomco

    Tomco Active Member

    258
    Aug 16, 2012
    Ottawa, Ontario
    2004 420 Sedan Bridge
    GHS Hydraulic Lift
    11' Walker Bay, 30hp
    Cummins 6CTA 8.3M
    When we purchased our boat we also had dancing tachs, tapping them would make them jump or settle down … no consistency. I planned on replacing them but tried the recommendation of rotating the switches on the rear side back and forth several times - this solved the jumping around. I purchased a laser tach and verified that they are accurate. They have both been rock solid all season. Was an easy and cheap fix!

    I have a multi-year plan to upgrade my electronics and plan to obtain the RPM's digitally on the new device(s) (chartplotter or replacement for Systems Monitor).
     
    scooper321 likes this.
  4. Tomco

    Tomco Active Member

    258
    Aug 16, 2012
    Ottawa, Ontario
    2004 420 Sedan Bridge
    GHS Hydraulic Lift
    11' Walker Bay, 30hp
    Cummins 6CTA 8.3M
    Mark, with these tachs are you able to program in the number of hours from the tachs being removed so the total remains accurate? if not, I wonder how that might play in the mind of a buyer when the physical view (on the new tach) is very different than the actual (old plus new)?
     
  5. Irie308

    Irie308 Well-Known Member

    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
    I think most people would hold on to the old tachs and give to potential buyer. We looked at an 04 420 DA which had 40 hrs on the replacement tachs. Seller said they had about 400 hours but never produced the old ones.
     
  6. Tomco

    Tomco Active Member

    258
    Aug 16, 2012
    Ottawa, Ontario
    2004 420 Sedan Bridge
    GHS Hydraulic Lift
    11' Walker Bay, 30hp
    Cummins 6CTA 8.3M
    I did look at the solution from Seaboard Marine and they have the ability to program in your old hrs … wasn't sure if this is possible with the more commercial offerings.
     
  7. Irie308

    Irie308 Well-Known Member

    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
    Can someone enlighten me as to how the overboard discharge works on our boats? I don't think i'll ever be able to use it in the waters that we boat but i would like to know how it operates. Currently the seacock is in the open position but there is no handle attached. I tried to close it with a replacement handle over the summer but it was pretty stiff. I didn't want to make my situation worse so I left it as is since i'll be hauling it in the coming weeks. I noticed that there are wires connected to the seacock, I assume that there is some sort of sensor. I also noticed i have a switch in the electrical panel but doesn't seem to energize when pressed.
     
  8. my3sons

    my3sons Well-Known Member SILVER Sponsor

    Feb 24, 2009
    NY (Lake Erie)
    2004 400DB, Onan 9 kw Gen, Highfield RIB,
    Cummins 6CTA
    Assuming it is the same as mine (same boat, you just have the next generation) there is a 12v breaker on the panel for the overboard discharge, that needs to be on for it to work.
    The seacock has to be open, those wires you refer to on the seacock sense when the seacock is open and will allow the overboard discharge to work when you turn on the rocker switch for the overboard discharge pump.
    If it's not working, make sure the 12v breaker is on and double check to be sure the seacock is really in the open position, if it's closed, the rocker switch will not activate it.
    The seacock may be closed as closing it and removing the handle is a method that some folks use to "lock" the system to stay compliant with no discharge zones.
     
    Islandtime04 and techmitch like this.
  9. bbwhitejr

    bbwhitejr Well-Known Member

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    On mine, the electrical wires go to a plate that is supposed to be bolted to the seacock in such a manner that when the handle is in the open position on the seacock, it makes a button on the plate. This button must be pushed to allow the macerator pump to come on and pump overboard. Mine is not hooked up meaning the plate is not attached to the seacock, but my surveyor figured it out during my survey.

    Bennett
     
    Islandtime04 likes this.
  10. my3sons

    my3sons Well-Known Member SILVER Sponsor

    Feb 24, 2009
    NY (Lake Erie)
    2004 400DB, Onan 9 kw Gen, Highfield RIB,
    Cummins 6CTA
    I'll add that just fyi, the overboard discharge pump is sealand's "T" pump (as opposed to the vacuflush's "s" pump) The T pump has 2 duckbills instead of 4, one on each side of the bellows, the duckbills are installed to prevent sea water from flowing into the holding tank when the overboard discharge is open. If your seacock is open as you said above, I am wondering if you experienced your holding tank emptying itself at all. It is not uncommon for the venturi effect against the thru hull caused by running on plane to pull the contents of the tank out when the valve is open. You can also tell when the duck bills are shot by opening the seacock on an empty tank while the boat is not moving. You will hear seawater flushing into the tank through the bad duckbills, assuming the pump and tank bottom are below the boats waterline. Always close the overboard discharge seacock after discharging.
    Also, when it come time to change those duckbills, the fittings on the pump that need to be removed to replace the duckbills are a left handed thread as opposed to the "s" pumps, which are right handed.
    That's it in a nutshell.
     
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  11. 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
    Excellent post's/info. Mark
     
  12. AEO

    AEO Member

    51
    Feb 6, 2019
    2008 44DB
    GHS Swim Platform
    2018 AB w 25HP Merc.
    Cummins QSC500’s
    Hey Guys, I’ve got a small red light located on my transom just above the hole for the shore power leads that is flashing .. Does anyone know what it’s trying to tell me? Thanks
     

    Attached Files:

  13. bajturner

    bajturner Member

    571
    Aug 17, 2010
    Ottawa, Ontario, Canada
    2008 44 Sedan Bridge
    Avon 380DL RIB w/ Yamaha 40
    Twin QSC-500 HO
    I don't have that light!
     
    AEO likes this.
  14. bajturner

    bajturner Member

    571
    Aug 17, 2010
    Ottawa, Ontario, Canada
    2008 44 Sedan Bridge
    Avon 380DL RIB w/ Yamaha 40
    Twin QSC-500 HO
    In addition to what everyone else has said, on my boat the overhang on the side of the handle opposite the attachment nut is what makes the connection to the interlock switch. When you open the valve, the overhang pushes the switch, completing the circuit and enabling the overboard discharge pump to be energized. Without the handle, you would need to enable the switch another way.
     
  15. bajturner

    bajturner Member

    571
    Aug 17, 2010
    Ottawa, Ontario, Canada
    2008 44 Sedan Bridge
    Avon 380DL RIB w/ Yamaha 40
    Twin QSC-500 HO
    Hey Carpe, can you explain what you mean by and inner and outer hull. Are you referring to the walk between the engines as in inner hull, or something else?

    Regarding the walk, I actually put an access hatch in it because I suspected there was water inside the cavity that couldn't escape. I really don't like inaccessible cavities. There was water, in fact. I don't know the source, but I believe it was entering from the front and/or rear bilge through small cracks or holes, and then had trouble escaping. It is dry now, but I see traces of water from time to time and I think there are a number of places water can seep into that area from.

    It was suggested to me by someone at Sea Ray that you can actually remove the fiberglass that makes up the walkway and replace it with removable panels of some sort. It's not structural at all...
     
  16. Carpediem44DB

    Carpediem44DB Active Member

    523
    Aug 18, 2015
    Sanfransico Bay area
    2006 44 DB Sedan Bridge Raymarine gS165 w Quantum HD Radar
    cummins QSC 8.3 500 HD
    All I know is when I had several 1 inch punctures in my hull in the prop tunnels I had no water intrusion to the bilge except thru two little pin holes in the center walk area. It took about two hours for the pump alarm to sound.
    I slept soundly knowing I could have a hole in my hull yet not take on a huge quantity of water.
     
    techmitch likes this.
  17. Robf

    Robf Member

    266
    Apr 17, 2013
    Winfield, WV
    2004 390 Motor Yacht
    Twin 8.1 Mercruiser Inboards
    Looking at a 2006 44 Sedan Bridge with about 800 hours on Cummins Diesels. I would be interested on any thoughts all of you may have on this boat, year, and engines. This is the first diesel boat I have considered and I am a little apprehensive about going to diesels regarding maintenance costs, etc. Appreciate any feedback.
    Rob
     
  18. Carpediem44DB

    Carpediem44DB Active Member

    523
    Aug 18, 2015
    Sanfransico Bay area
    2006 44 DB Sedan Bridge Raymarine gS165 w Quantum HD Radar
    cummins QSC 8.3 500 HD
    Great boat great engine package. If your going to jump in to a boat of this caliber, although MX is a factor, whether it’s diesel or gas isn’t a huge difference. Your not going to want a boat that big with gas engines. If your handy and able, a lot of the service and preventative MX can be done yourself.
    I’ve put 300 hrs on mine in four years doing the basic services and spend around 500 a year doing so. I’ve yet to have to have any major repairs done on the engines and I’m at 15 years and 400 hours total.
    Jump in and enjoy!
    Carpe Diem
     
  19. hipo

    hipo New Member

    18
    Aug 8, 2017
    Kent Narrows, MD
    2005 420 Sedan Bridge
    Cummins 6CTA
    The learning curve is not bad from gas to diesel--once you figure out filters, fluids, impellers-- Only thnins to make sure of are aftercooler and heat exchanger service was done and keep doing it--LOVE THE BOAT AND THE ENGINES
     
  20. Tomco

    Tomco Active Member

    258
    Aug 16, 2012
    Ottawa, Ontario
    2004 420 Sedan Bridge
    GHS Hydraulic Lift
    11' Walker Bay, 30hp
    Cummins 6CTA 8.3M
    Hi Brian, I wondered about that sealed area and water. What did you do to add a hatch? pics?
     

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