Putting electronics in 400 Sundancer - thru hull or transom transducer?

Discussion in 'Announcements & FAQs' started by Tiki Sea Rays, Aug 6, 2015.

  1. Tiki Sea Rays

    Tiki Sea Rays New Member

    5
    Oct 28, 2014
    Tiki Island, TX
    1999 400 Sundancer
    2007 290 Sundancer
    1999 - none
    2007 - twin big blocks
    Hi all - This is my very first post so I hope I'm making it a good one. We just acquired a 1999 400 SD and it only has the basic electronics it came with. We'd like to put in a GPS or radar and I'm wondering what the proper transducer placement would be - thru-hull or transom mount? Or are there other options? The boat is in saltwater, if that makes a difference. Your advice is appreciated. Many thanks.
     
  2. Mike Blake

    Mike Blake Active Member

    Jan 27, 2012
    Yankeetown FL West coast
    89 340 Sundance all Raymarine.
    Gas hogs 454X2.
    Thru hull, there should already be one there on that boat no?
     
  3. RollerCoastr

    RollerCoastr Well-Known Member

    Nov 15, 2007
    Cedar Point, OH / Miami, FL / MacRay Harbor, MI
    1997 400DA
    340HP 7.4 Mercruiser Bluewaters
    Garmin 741, 742, 8212, 24HD, Intellian I2
    1999 280BR
    Twin 250HP Merc 350 Alpha Ones
    Congrats. and welcome to the club!

    I've never seen a 400DA (SD is the designation for the "Sundeck" bowrider) without a transducer. Are you sure you need to add one?

    If you do, a transom-mount would be a big red flag at resale time - that's very uncommon in larger boats.
     
  4. Tiki Sea Rays

    Tiki Sea Rays New Member

    5
    Oct 28, 2014
    Tiki Island, TX
    1999 400 Sundancer
    2007 290 Sundancer
    1999 - none
    2007 - twin big blocks
    Hi Mike, I don't know. If it's below the water line, then I haven't seen one. It'll be coming out of the water soon for a bottom job so if there's one among the barnacles, I'll see it then. I'll be honest - I didn't think the boat was sophisticated enough to have a transducer since there's a place at the helm for reading nav charts (hence the need for electronics.) The boat has no engines - I know, I'm putting the cart before the horse - so drilling any holes would be done when the boat is out having the bottom job done. Thanks, Maryann
     
  5. RollerCoastr

    RollerCoastr Well-Known Member

    Nov 15, 2007
    Cedar Point, OH / Miami, FL / MacRay Harbor, MI
    1997 400DA
    340HP 7.4 Mercruiser Bluewaters
    Garmin 741, 742, 8212, 24HD, Intellian I2
    1999 280BR
    Twin 250HP Merc 350 Alpha Ones
    The chart area was standard on the 400DA throughout production from the '97 model year into 2000. Some never had navigation electronics installed, but I've seriously never seen one without a transducer. Mine is mounted just fwd of each engine (a speedo wheel on one side, sounder on the other).

    wow. well, fwd of where your engines WOULD be. :grin:
     
  6. Tiki Sea Rays

    Tiki Sea Rays New Member

    5
    Oct 28, 2014
    Tiki Island, TX
    1999 400 Sundancer
    2007 290 Sundancer
    1999 - none
    2007 - twin big blocks
    Thanks RollerCoastr for correcting my Sundancer abbreviation - my newbie is showing! Not sure what I need to add, really. I'm just trying to get a jump start on what to do when she's out of the water. Any GPS or radar advice is totally welcomed. Hopefully getting repowered soon since we got her minus the engines.
     
  7. Mike Blake

    Mike Blake Active Member

    Jan 27, 2012
    Yankeetown FL West coast
    89 340 Sundance all Raymarine.
    Gas hogs 454X2.
    No engines and in the water? How did that happen?
     
  8. Tiki Sea Rays

    Tiki Sea Rays New Member

    5
    Oct 28, 2014
    Tiki Island, TX
    1999 400 Sundancer
    2007 290 Sundancer
    1999 - none
    2007 - twin big blocks
    Magic. No, Sea-Ray-ously......the former owner, a few doors down the canal from us, had his boat guy come down and pull them out to supercharge them and then got divorced and we now have a beautiful boat. You are now up to speed.
     
  9. Gofirstclass

    Gofirstclass Well-Known Member GOLD Sponsor

    Apr 20, 2010
    Tri Cities, WA
    1995 550 Sedan Bridge,
    2010 Boston Whaler 130 Super Sport,
    1981 Boston Whaler 130 Sport,
    CAT 3406C's, 580hp.
    Tiki, Congrats on the new boat and the fun you're going to have with it. And welcome to CSR. This is a good place to get your questions answered.

    I think the surprise about the boat being in the water without engines had more to do with how they plugged the holes for the prop shafts, etc.

    What I would suggest you do is find a reputable marine electronics place and pay them a visit. You're going to want more than a depth finder in that boat. A marine electronics dealer will be able to show you various radar systems, chart plotter systems and discuss with you what is needed to get them to "talk" to each other.
     
  10. Tiki Sea Rays

    Tiki Sea Rays New Member

    5
    Oct 28, 2014
    Tiki Island, TX
    1999 400 Sundancer
    2007 290 Sundancer
    1999 - none
    2007 - twin big blocks
    Thanks for the advice, Gofirstclass. And nice boat. I have a funny feeling I'm going to be a card-carrying member of the Hole in the Water Club as well. I'm sure there will be more questions...like, does docking get easier as the boat gets bigger?
     
  11. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    Just so you….or the electronics guy you choose……… know, Sea Ray has anticipated the need for transducers beyond the typical depth,speed, temp tridata instrument. There is an area in the hull, usually where the forward bilge sump is right behind the main bulkhead that is solid glass and this is where any added transducers should be positioned.

    Many current generation plotters now have optional bottom machines available in the same dash unit. For a few hundred $$, you can ad a very sophisticated bottom machine that you can see on your plotter with a split screen. This saves adding another display to a crowded dash, but does require an additional transducer.
     
  12. BOEMARINEBRIAN

    BOEMARINEBRIAN New Member PLATINUM Sponsor

    82
    Oct 13, 2014
    Chesapeake Bay
    up in the air
    many
    In no way should you be mounting a transom mounted transducer to a 400 Sundancer. you need a thruhull and fairing block
     
  13. ttmott

    ttmott Well-Known Member

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Tiki Sea Rays
    Your boat should have two transducers originally installed; one for depth and one for speed and temperature. They are both located in the engine room forward bilge under the AC water pump and strainer.

    The original ones are rather old tech and best to replace them with new and up to date. I replaced mine with Airmar NEMA 2000 Depth/Temperature and a sonar. Both feed the NEMA 2000 backbone and new Garmin Instruments.
     
  14. RollerCoastr

    RollerCoastr Well-Known Member

    Nov 15, 2007
    Cedar Point, OH / Miami, FL / MacRay Harbor, MI
    1997 400DA
    340HP 7.4 Mercruiser Bluewaters
    Garmin 741, 742, 8212, 24HD, Intellian I2
    1999 280BR
    Twin 250HP Merc 350 Alpha Ones
    That's interesting - mine are basically under the fwd end of the shafts. I have a bilge pump and float switch in the area you describe.
     
  15. ttmott

    ttmott Well-Known Member

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    That indeed is interesting. I also have a bilge pump and a thru-hull for the AC water in that area.
     
  16. takemboating

    takemboating New Member

    27
    Jul 22, 2014
    Wisconsin
    23' open bow, behind 2010 Ram1500 hemi
    496 mag, bravo I
    docking will get a lot easier once you get the engines installed.
     

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