Yanmar 4JH common rail engines - what's needed
Creation date: 7/26/2025 10:00 PM
Updated: 7/26/2025 10:02 PM
If you have a Yanmar common rail engine including 3JH40, 4JH45, 4JH57, 4JH80, and 4JH110 a YDEG-04 and one of two Yanmar wiring adapters will provide engine instrumentation to your NMEA 2000 network.
There are two wiring adapter options:
- The 4JH Wiring adapter connects to your engine's diagnostic connector. This connection is located on the side of your engine and hence will require extending your NMEA 2000 network to the engine compartment.
- The B25/C35 Wiring adapter connects to a Yanmar B25 or C35 control panel. Typically this panel is located at a helm or in the cockpit. If your NMEA 2000 network is already adjacent to a B25 or C35 panel, this may be an easier connection.
In either case, the available data will be the same. The only difference between the two adapters is the location at which you make the connection.
YDEG-04s are available in two varieties, the first is a YDEG-04N with a DeviceNet connector NMEA 2000. The second is the YDEG-04R with a Raymarine SeaTalk NG connector for Raymarine SeaTalk NG networks.
For your convenience, we have put together several shopping carts.
NMEA 2000 - YDEG-04N
- Single engine with 4JH adapter and a YDEG-04N for NMEA 2000
- Twin engine with 4JH adapters and YDEG-04Ns for NMEA 2000
- Single engine with 4JH adapter and a YDEG-04N for NMEA 2000
- Twin engine with B25/C35 adapters and YDEG-04Ns for NMEA 2000
SeaTalk NG - YDEG-04R
- Single engine with 4JH adapter and a YDEG-04R for NMEA 2000
- Twin engine with 4JH adapters and YDEG-04Rs for NMEA 2000
- Single engine with 4JH adapter and a YDEG-04R for NMEA 2000
- Twin engine with B25/C35 adapters and YDEG-04Rs for NMEA 2000
If you have any questions, please email us at info@yachtdevicesus.com or give us a call at 239-688-7680.