NMEA 2000 with twin 5.7 mercruisers

Discussion in 'Sport Cruisers' started by DjNiki4, Jun 14, 2019 at 12:21 PM.

  1. DjNiki4

    DjNiki4 Member SILVER Sponsor

    Sep 26, 2016
    2004 260 Sundancer
    MAG 350
    Hi guys

    I just got a new to me 2004 Sundancer 300 It does have the smartcraft gauges as well
    I am trying to get the engine data to show on my Garmin 742gps

    I bough this smartcraft gateway from mercruiser but since I have two engines would I need an additional Y connector or not? Also where about is the location where the gateway needs to be plugged in?

    Lastly what’s the best way to get power to your NMEA connection mines behind the gps

    Attached Files:

  2. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    I'm not sure on your gateway but the kind I've looked at in the past (Fox gateways) connect directly to the engine ECM or diagnostic port. As such you'd need one per engine.

    If you don't have an existing NMEA network onboard you'll need to buy a NMEA power adapter. It's basically a 12V connection on one end and the standard NMEA connection on the other. The NMEA network needs its own (switched) 12V power. You'll need a few T's and terminators too. Plenty of threads around here if you do a quick search. NMEA wiring has it's on unique characteristics. It's a bit unlike any DIY I had done before when it comes to the bits and pieces needed...
    DjNiki4 likes this.
  3. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Depends - did you get the CAN P or CAN H gateway? The CAN P (which is for engine data) is P/N 8M0105243
    If you got the CAN P gateway you will need the WAKE harness duel engine adapter which will bridge between two Smartcraft junction blocks and connect the gateway.
    Last edited: Jun 15, 2019 at 6:02 AM

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