Yacht Devices J1708 Engine Gateway brings data from older engines to NMEA 2000

Ben Stein

Ben Stein

Publisher of Panbo.com, passionate marine electronics enthusiast, completed the Great Loop in 2017.

19 Responses

  1. Anonymous says:

    Good article. Also this product for Yanmar http://mbwtech.com/node/127. I’ve not used it yet but for this investigating it looks like a good plug and play solution.

  2. Patrick says:

    Very interesting. Do you know if this device would work on a 2002 Luggar L6108A2?

    • Ben Stein Ben Stein says:


      I believe the L6108A2 is an entirely mechanical engine. The protocol converters (YDES, YDEG, J2K100, etc) are all designed to interface with an ECU which isn’t present on the L6108A2. So, I think your only option would be the EMU-1 or RS11.

  3. William L. Bowen says:

    Great and timely article. Maybe you can help me with my own setup. I a have a 2006 Volvo Penta D6-260I-B with a Volvo Penta NMEA 2000 Gateway No. 3840289, Serial No. 06260017 (original equipment with the boat) and a Garmin 5212 MFD. The Garmin reads fuel flow inaccurately at about twice the actual usage. I can find no configuration in the Garmin setup. Garmin has not been able to help. The only thing I can think of is that this early version of gateway is not up to date with the NMEA 2000 protocols. Can you help?

    • Ben Stein Ben Stein says:


      I don’t have a ton of experience with the VP Easy Connect gateways. Volvo seems to show limited interest in the product and doesn’t do much to support them. I don’t think there’s a way to capture raw data coming out of the engine with the Volvo product. That’s my normal first step in troubleshooting as the Yacht Devices products allow a capture of the raw J1939 or J1708 stream that can then be analyzed and corrections made.

  4. Rick says:

    HI… I have all B&G on my Lagoon… so the network is SimNet. I have ordered the YachtD devices for my Yanmar engines, as well as the YDWG-02 to get NMEA data to my laptop… I have located three 7 port SimNet joiners onboard. Two at the salon Nav station and one in the starboard engine bay. But only have three empty ports, two in the engine bay, and one at the Nav station. That should be enough for what I have ordered, but am also interested in the Voyage Recorder. How would I connect the Voyage Recorder. I’ve been told that I shouldn’t have multiple devices off a SimNet port. I had thought I could just connect two NMEA 2000 T connectors to a Navico converter cable that was plugged into the SimNet port. But am told by Navico support that doing that could cause issues. Thoughts?

    • Ben Stein Ben Stein says:


      Unfortunately I don’t know SimNet too well but here’s what I do know… SimNet (like Raymarine SeatalkNG) appears to be just a differently physical connector overlayed on top of the NMEA 2000 spec. The NMEA 2000 spec is quite clear about that drops are limited to 6 meters, but what’s less understood is that along that drop there can be many devices connected (Ben E. has a great post that shows all sorts of interesting things you can do and remain in spec here https://www.panbo.com/actisense-nmea-2000-cables-connectors-plus-network-design-tips/).

      With that in mind, and knowing that SimNet is just a different connector I sure don’t see a problem with multiple devices off Ts on a converter cable. But, I’d also be curious to know what Simrad recommends if they don’t want multiple Ts off a converter.

      Ben S.

      • Rick says:


        Thanks for the reply. I have found all five 7 port Simnet joiners on board and have enough empty ports to add my new YachtD devices with adaptor cables. Now the hunt for the cables, as I only see 0.5m, 1m,and 4m cables online…, I’ve also been told to keep the cables to 6m or less, but I know the anemometer is connected with a 20m cable, and the joiner to joiner cables are up to 10m… and there is a total cable length for all cables…

        Regards. Rick

  5. Xavier says:

    Back in 2013, I had a Maretron EMS 100 installed so we could monitor our Yanmar 4JH3-HTE built in 2001. To this day, things such as RPM, oil pressure, etc., display beautifully on our B&G Zeus 12 and B&G Zeus2 chartplotters.

    If your engine is not N2K compatible, you need a box (such as my Maretron or the Yacht Devices J1708) that can put out the engine’s data on the N2K bus. Once the data is there, many, if not all modern chart plotters should be able to display the information.

  6. Mike Field says:

    Great article Ben,

    We recently supplied some of these to be fitted to a pair of TAMD75
    They worked perfectly, we only added the “ENGINE_ID=1” to one unit before installation. 🙂
    All data including fuel rate displayed.

    Having installed quite a few of the YDEG versions for D4 / D6 / D12 without a hitch I must say how impressed we are with them.

    The support from yachtd is also first class.


    Mike Field

  7. Claus Kastenskov says:

    I just bought two of these.
    My engines are TAMD 75 P/A from 2005.
    My boat is on the det for a month. Are there a way to check if everything is working when I can not start the engines?
    I have a Raymarine mfd.

  8. Claus Kastenskov says:

    What will I see for fuelconsumption?
    I get 0,0 L/h, does that mean I get proper reading when I start?
    Wouldn’t it be: -,- if it did not work?

  9. Mark Wolff says:

    I have Perkins 6.354 engines which are completely analog. Looking through Yacht Devices offerings (before finding this post), I noticed the temp sensor and wondered if they would either offer one with NPT threads much like an analog temp sending unit has. An alternative would be to offer an immersion well for their probe. Hopefully a pressure transducer is on the way too!

  10. Mark says:

    Great article… I have a 2002 Formula 40PC powered by twin Yanmar 6LY2A-STP diesels and I have the Garmin GPSMAP 942XS for Nav and data. Do you have a suggestion for which device(s) and cable(s) will be required to gather the engine data and display it to my Garmin? Any help would be greatly appreciated.

    Thanks, Mark

  11. Michael says:

    Very interesting! I’ve been looking for a way to get this info from my Volvo TAMD41H-B on to my NMEA2000/Seatalkng network for some time. Which YachtDevices device will work for me? Do you know if it will provide fuel flow data? Thank you!

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