# 6C5-8591A-35.-00 Yamaha ECU 50HP 60HP | Genuine Used Part

🔧 Product Description

  

Genuine Yamaha F50 / F60 ECU / Engine Control Unit - Part Number: 6C5-8591A-35-00

  

A genuine Yamaha engine control unit used on F50, F60 and T60 / FT60 four-stroke EFI applications. This ECU manages fuel injection, ignition timing, idle speed, sensor monitoring and engine-protection functions on compatible 50HP and 60HP Yamaha outboards.

  

⚙️ Key Features

  

• Genuine Yamaha ECU / engine control unit

• Correct Yamaha part number 6C5-8591A-35-00

• Listed as 6C5-8591A-35.-00 in the supplied title; correct Yamaha formatting is 6C5-8591A-35-00

• Used on F50 / F60 / T60 / FT60 four-stroke EFI electrical-system applications

• Exact model code, market code, serial number and ECU label must be confirmed

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6C5-8591A-35-00 current Yamaha ECU reference

• 6C5-8591A-30-00 earlier ECU reference superseded to 6C5-8591A-35-00

• 6C5-8591A-31-00 / 6C5-8591A-32-00 / 6C5-8591A-33-00 related F50 / F60 ECU calibration references

  

OEM / Related Numbers:

  

• 6C5-8591A-35-00

• 6C58591A3500

• 6C5-8591A-35

• 6C5-8591A-30-00

• 6C5-8591A-31-00

• 6C5-8591A-32-00

• 6C5-8591A-33-00

• Related F50 ECU family reference: 6C1-8591A series

• Related rectifier / regulator reference: 68V-81960-10-00

• Related ignition coil damper reference: 6C5-82317-01-00

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha F50 / F60 / T60 / FT60 EFI four-stroke engine-management systems

  

Typically suits:

  

• Engine models:

• Yamaha F50FEHT 2014 electrical-system applications

• Yamaha F50FET 2014 electrical-system applications

• Yamaha F60CEHT 2014 electrical-system applications

• Yamaha F60CET 2014 electrical-system applications

• Yamaha FT60DET 2014 electrical-system applications

• Yamaha F60L 2015-2016 electrical-system applications

• Yamaha F60LH 2015-2016 electrical-system applications

• Yamaha T60L 2015-2016 electrical-system applications

• Yamaha T60X 2015-2016 electrical-system applications

• Yamaha F60L 2021-2024 electrical-system applications

• Yamaha F60LH 2021-2022 electrical-system applications

• Yamaha T60L 2021-2024 electrical-system applications

• Yamaha T60X 2021-2024 electrical-system applications

  

• HP Range: 50HP - 60HP

• Engine Type: Yamaha EFI four-stroke outboard

• Year Range: 2014, 2015-2016, and 2021-2024 catalogue applications where 6C5-8591A-35 is specified

• Fitment Note: ECU calibration must be matched to the exact Yamaha model suffix and market code

  

🔌 Function

  

The ECU controls EFI fuel injection, ignition timing, idle speed, diagnostic output, warning functions and engine-protection response.

  

Common signs of failure:

  

• No-start with confirmed fuel supply, ignition input and ECU power

• No injector pulse or unstable injector command

• No diagnostic communication

• Intermittent stalling or limp mode

• Persistent ECU or sensor fault codes after wiring checks

• Rough running, rich condition or lean condition after mechanical checks

• ECU failure caused by voltage spike, corrosion or water ingress

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 400.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Electronic Components | ECU CDI & Electrical Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 400.00 AUD | In stock |

## Images

- 6C5-8591A-35.-00 Yamaha ECU 50HP 60HP | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6c5-8591a-35-00-yamaha-ecu-50hp-60hp-genuine-used-part)
> Updated: 2026-07-07