OBDII Adapter Cable – Yamaha Marine

Overview

Connect directly to supported Yamaha marine applications using HP Tuners’ purpose-built Yamaha Outboard 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 flashing cables:

• OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 1)
• OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 2)
• 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.

Supported Yamaha Marine Applications

Which cable do I need?
Yamaha outboards use different ECM connector styles depending on model and year. Select the tab that matches your engine’s ECU connector to find the correct flashing cable.

34-Pin ECU Connector – Style 1
34-Pin ECU Connector – Style 2
44-Pin ECU Connector – Style 2

These Yamaha outboard engines use the 34-Pin ECU Connector (Style 1) and require the corresponding OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 1).

Please verify the connector style on your engine before selecting a cable.

Supported Models

• 2017-2024 F150 2.8L 6HP
• 2022-2025 F200 2.8L 6LH
• 2013-2024 F200 2.8L 6DV
• 2010-2021 F225 4.2L 6CL
• 2008-2010 F250 3.3L 6BR
• 2009-2021 F250 4.2L 6CB
• 2010-2021 F250 4.2L 6CG
• 2010-2021 F300 4.2L 6CE
• 2007-2009 F300 4.2L 6BJ
• 2020-2024 F300 4.2L 6KA
• 2007-2019 F350 5.3L 6AW

These Yamaha outboard engines use the 34-Pin ECU Connector (Style 2) and require the OBDII Adapter Cable – Yamaha Outboard (34 Pin ECU, Style 2).

Please confirm the ECU connector style on your engine prior to purchase.

Supported Models

• 2005-2025 F50 1.0L 6C1
• 2005-2024 F60 1.0L 6C5
• 2010-2024 F70 1.0L 6CJ
• 2005-2017 F75 1.6L 6D6
• 2005-2017 F90 1.6L 6D8
• 2011-2014 F115 1.8L 68V
• 2014-2025 F115 1.8L 6EK

These Yamaha outboard engines use the 44-Pin ECU Connector (Style 2) and require the OBDII Adapter Cable – Yamaha Outboard (44 Pin ECU, Style 2).

Confirm connector type before selecting your cable.

Supported Models

• 2005-2010 F115 1.8L 68V
• 2005-2024 F150 2.7L 63P
• 2005-2010 F225 3.3L 69J

Key Features

Purpose-built Yamaha marine adapter cables
Designed specifically to connect HP Tuners interfaces to supported custom tuning on Yamaha marine ECM.

Integrated ECM power supply
Includes battery alligator clips that provide stable voltage to the ECM during the calibration write process.

Direct connection to supported marine ECMs
Provides reliable communication between MPVI3 or MPVI4 interfaces and Yamaha controllers.

Important Usage Notes

• These cables are designed for calibration writing only.
• The engine must remain OFF during the calibration write process.
• Stable battery voltage must be maintained during calibration writing.
• Always verify connector style before selecting a cable.
• For diagnostics, use the Yamaha 3-Pin Diagnostic Cable.

Requirements

To use these Yamaha marine flashing cables you will need:

• MPVI3 or MPVI4 interface
• VCM Suite software
• Supported Yamaha Marine Application

In the Box

• Yamaha Outboard OBDII Adapter Cable (selected style)

Quick Start Guide

• Please click HERE to see our detailed quick start guide.

Prop65 Disclosures

• CA WARNING: This product can expose you to Nickel, a carcinogen, and Lead, a reproductive toxicant. See www.P65Warnings.ca.gov/