OEM Yamaha F350 V8 ECU ECM 6AW-8591A-00-00 6AW-00 J5T45371 Engine Control Unit

Genuine OEM Yamaha Engine Control Unit (ECU/ECM) manufactured by Mitsubishi and removed from a Yamaha F350 V8 four-stroke outboard. This module is marked 6AW-00, J5T45371, and date code 7731, and belongs to the Yamaha 6AW-8591A-00-00 ECU family.

Designed for Yamaha's 5.3L F350 V8 offshore outboards, this ECU controls critical engine functions including fuel injection, ignition timing, throttle management, engine monitoring, and overall engine operation. OEM control modules like this are essential for proper engine performance and reliability.

This unit was removed from a freshwater application and shows normal cosmetic wear consistent with previous marine use. Please verify compatibility using your engine model, serial number, and original part number before purchasing.

Features & Highlights:

• Genuine OEM Yamaha Component
• Engine Control Unit (ECU/ECM)
• Mitsubishi Manufactured
• Yamaha ECU Family: 6AW-8591A-00-00
• Module Markings: 6AW-00
• Mitsubishi Number: J5T45371
• Date Code: 7731
• Controls Fuel Injection & Ignition Timing
• Manages Engine Monitoring & Diagnostics
• OEM Multi-Pin Electrical Connector
• Factory Mounting Tabs Intact
• Fits Select Yamaha F350 5.3L V8 Four-Stroke Outboards
• Freshwater Removed

Specifications:

• Brand: Yamaha
• Manufacturer: Mitsubishi
• Yamaha ECU Family: 6AW-8591A-00-00
• Module Code: 6AW-00
• Mitsubishi Number: J5T45371
• Date Code: 7731
• Engine Compatibility: Select Yamaha F350 5.3L V8 Four-Stroke Outboards
• Engine Type: 5.3L V8 EFI Four-Stroke
• Function: Engine Control Unit (ECU/ECM)
• Condition: Used OEM

Condition Details:

This ECU is in good used condition with normal cosmetic wear from previous marine use, including light surface scratches and handling marks. The housing is intact, the electrical connector is clean and undamaged, and the mounting tabs are fully intact. The module has not been reprogrammed or modified. Please review all photos carefully and verify compatibility with your specific Yamaha engine model and serial number before purchasing.

Dealer Sale – Sunset Marine TX LLC

SKU: 10464