OBDII Adapter Cable - Yamaha Marine Outboard (26-Pin ECU - Style 1)

Connect directly to supported Yamaha marine applications using HP Tuners’ purpose-built Yamaha OBDII Adapter Cables—supporting both outboard and WaveRunner models.

NOTE: These cables are for flashing/writing only. To data log, scan, and diagnose your Yamaha marine application, please see OBDII Adapter Cable – Yamaha 3-Pin.

Connect directly to supported Yamaha marine applications using HP Tuners’ purpose-built Yamaha Outboard & WaveRunner OBDII Adapter Cables.

These marine adapter cables allow professional tuners, marine technicians, and hands-on owners to connect MPVI3 or MPVI4 interfaces to supported Yamaha marine ECMs for calibration writing.

Unlike standard diagnostic adapters, these cables include integrated battery clips that provide stable external power to the ECM during the calibration write process. Supplying power to the ECM is required in marine applications because the engine must remain off during the process.

Whether you are performing calibration work for performance improvements, improved throttle response, or enhanced fuel efficiency, these Yamaha marine adapter cables provide a reliable connection between your HP Tuners interface and the engine’s ECM.

Available Cable Options

This product page includes the following Yamaha outboard & Waverunner flashing cables:

• OBDII Adapter Cable – Yamaha Outboard (26-Pin ECU, Style 1)
• OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 1)
• OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 2)
• OBDII Adapter Cable – Yamaha WaveRunner (44 Pin ECU, Style 1)
• OBDII Adapter Cable – Yamaha Outboard (44 Pin ECU, Style 2)

Use the dropdown selector to choose the cable that matches your Yamaha engine’s ECM connector.