# 6G8-85540-29 Yamaha CDI | Genuine Used Part

🔧 Product Description

  

Genuine Yamaha CDI Unit Assembly - Part Number: 6G8-85540-29-00

  

A genuine Yamaha CDI unit used on selected Yamaha small four-stroke outboards.

  

⚙️ Key Features

  

• Genuine OEM electrical component

• Correct OEM part number family

• Used on serial/model-specific marine applications

• Requires exact model and serial confirmation

• Includes full diagnostic relevance for electrical fault tracing

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6G8-85540-29-00 listed Yamaha CDI reference

• 6G8-85540-20-00 related earlier CDI family reference

• 6G8-85540-21-00 related earlier CDI family reference

  

OEM / Related Numbers:

  

• 6G8-85540-29-00

• 6G8855402900

• 6G8-85540-29

• 6G88554029

• Related Yamaha 9.9HP 4-stroke CDI family reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha 9.9HP four-stroke CDI ignition systems

  

Typically suits:

  

• Engine models:

• Yamaha 9.9HP four-stroke applications using 6G8-85540-29-00

• Yamaha F9.9 4-stroke 1985-2005 applications where the CDI label matches

• Yamaha T9.9 / FT9.9 related 6G8 ignition applications where specified

  

• HP Range: 9.9HP

• Engine Type: Yamaha small four-stroke outboard

• Year Range: approximately 1985 - 2005 depending on model and market

• Serial / Model Note: Match by exact model code, serial-numbered diagram, label and connector layout before installation.

  

🔌 Function

  

This component supports the engine electrical or ignition system according to its assigned control, charging, or signal-generation function.

  

Common signs of failure:

  

• No spark or weak spark

• Intermittent spark loss when hot

• Hard starting or no-start condition

• Misfire under load

• Fault remains after stator, trigger, coil and harness checks

• Water, heat or corrosion damage at connectors

• Spark returns when a known-good module is fitted

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 100.0 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 | 100.00 AUD | In stock |

## Images

- 6G8-85540-29 Yamaha CDI | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6g8-85540-29-yamaha-cdi-genuine-used-part)
> Updated: 2026-06-29