OBDSTAR (M083) | Universal 9-pin OBD - 16-pin OBD2 Adapter Cable | Motorboat
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The OBDSTAR M083 is the universal adapter cable for the 9-pin round diagnostic port on marine and industrial diesel engines. It connects that port to the 16-pin OBD2 (J1962) connector of your OBDSTAR device and attaches directly to the diagnostic port on the engine side.
The 9-pin round connector is used by several marine diesel engine manufacturers. The cable carries signals such as K-line or CAN-bus to the diagnostic scanner. The pin configuration is specifically tailored to these marine applications, so no additional adapters are required. What you gain is access to the engine control unit of the boat motor. Which fault codes, sensor readings and system data are available depends on the OBDSTAR device you use and the support for each engine brand in the accompanying software.
KEY BENEFITS
IMPORTANT NOTES
Applications and functionality
Through the 9-pin round port, you can access marine engine control systems.
Control units you can reach
- Engine control unit (ECU): The boat engine control module behind the 9-pin round diagnostic port.
- Powertrain systems: The marine engine systems where the device can identify system faults via this port.
What you can do
- Read and clear fault codes: Retrieve active and stored fault codes from the boat engine ECU and remove them after diagnosis.
- Read live data: Monitor real-time sensor values such as engine speed, coolant temperature and fuel pressure.
- Marine ECU system diagnosis: Access the control systems to identify powertrain faults.
- Establish connection: The 9-pin round port is converted to the OBD2 format your device expects.
- Note: Available functions vary by engine manufacturer and OBDSTAR device.
Compatible vehicles and applications
The 9-pin round diagnostic port is the determining factor, not the engine model. The engine manufacturers and systems listed below are confirmed compatible via this connection. Specific models are not listed by year of manufacture.
- Cummins: Cummins marine diesel engines (various years)
- Cummins MerCruiser Diesel: MerCruiser Diesel marine engines (various years)
- John Deere: John Deere marine engines (various years)
- Kohler Power Systems: Kohler marine generators and engines (various years)
- VM Motori: VM Motori marine diesel engines (various years)
Package contents
- 1x OBDSTAR (M083) | Universal 9-pin OBD to 16-pin OBD2 Adapter Cable | Marine Engine
Technical specifications
General
- The brand of the cable or adapter. It often has to match the brand of your diagnostic tool.Brand
- OBDSTAR
- The type of product: a separate adapter cable, an adapter without a cable or a complete set.Product type
- Adapter cable
- The number of vehicle brands the cable is suitable for. Many adapter cables only fit one brand with its own connector.Number of vehicle brands
- 5 brands
Suitable for
- Whether the cable needs a separate power connection, for example via battery clamps. A passive cable works without one.Separate power supply required
- No
Connections
- The connector that plugs into the diagnostic port of the vehicle or machine. It must fit exactly.Vehicle-side connector
- 9-pin OBD
- The connector on the side of your diagnostic tool or interface. Usually a 16-pin OBD2 connector.Tool-side connector
- 16-pin OBD2
- The data lines through which the cable passes signals. The vehicle and the tester must use the same communication method.Communication
- K-line
- CAN-bus
Size and weight
- The weight of the cable or adapter.Weight
- 0.3 kg
- Control units
- Engine control unit (ECU)
Other specifications
- Application
- 9-pin round diagnostic port on marine and industrial diesel engines
- Segment
- Marine engine
- Model range
- Various model years per brand; determined by the presence of the 9-pin round diagnostic port
- Required to use
- OBDSTAR diagnostic reader with marine coverage, such as the Marine Master or an IScan variant
- Additional requirements
- None; the cable operates without adapter or external power
