OEM Yamaha F300 F350 ECU Engine Control Module 6AW-00 J5T45371 6AW-85740-00-00
Genuine OEM Yamaha Engine Control Unit (ECU) / Engine Control Module removed from a Yamaha four-stroke EFI outboard engine. This ECU is marked 6AW-00, J5T45371, and corresponds to Yamaha part number 6AW-85740-00-00. Manufactured by Mitsubishi, this module manages critical engine functions including fuel injection, ignition timing, throttle response, and overall engine performance.
This ECU is commonly found on select Yamaha F300 and F350 V6 four-stroke outboards. It has been 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 part number prior to purchase.
Features & Highlights:
- Genuine OEM Yamaha Component
- Engine Control Unit (ECU) / ECM
- Yamaha Part Number: 6AW-85740-00-00
- Module Markings: 6AW-00
- Mitsubishi Number: J5T45371
- Additional Code: 7731
- Controls Fuel Injection & Ignition Timing
- Factory Multi-Pin Connector
- OEM Mounting Tabs Intact
- Fits Select Yamaha F300 & F350 Four-Stroke Outboards
- Freshwater Removed
Specifications:
- Brand: Yamaha
- Manufacturer: Mitsubishi
- Part Number: 6AW-85740-00-00
- Module Code: 6AW-00
- Mitsubishi Number: J5T45371
- Additional Marking: 7731
- Engine Type: Four-Stroke EFI Outboard
- Fuel Type: Gasoline
- 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 connector terminals appear clean, and the mounting tabs are undamaged. It 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: 10447











