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CDI Unit for Yamaha 40HP 2-Stroke Outboard | 6F6-85540-00
CDI Unit for Yamaha 40HP 2-Stroke Outboard | 6F6-85540-00
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Product Overview
Replacement 12-pin CDI ignition unit for selected Yamaha 40HP 2-stroke outboard engines, including compatible E40, 40MH, E40M, E40W, 40WH, and 40W applications.
Designed to replace Yamaha OEM 6F6-85540-00, this CDI features an 8+4 male plug configuration and measures approximately 71 × 63 × 26mm.
Before ordering, verify the OEM number, complete outboard model code, 12-pin connector configuration, dimensions, mounting points, and original CDI appearance.
Product Compatibility
| Make | Model / Series | Engine | Engine Type | OEM Reference |
|---|---|---|---|---|
| Yamaha | E40 | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
| Yamaha | 40MH | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
| Yamaha | E40M | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
| Yamaha | E40W | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
| Yamaha | 40WH | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
| Yamaha | 40W | 40HP | 2-Stroke Outboard | 6F6-85540-00 |
Fitment Note: Yamaha used different ignition components across 40HP outboard families and production years. Match OEM 6F6-85540-00 and the original CDI configuration rather than relying on horsepower alone.
OEM Cross-Reference Numbers
Yamaha
- 6F6-85540-00
- 6F6-85540-00-00
The extended 6F6-85540-00-00 format may appear in Yamaha dealer or parts-catalog listings for the same base part reference.
Specifications
| Specification | Details |
|---|---|
| Product Type | CDI Unit / Ignition Module |
| OEM Reference | 6F6-85540-00 |
| Engine Type | 2-Stroke Outboard |
| Horsepower | 40HP |
| Connector | 12-Pin Male |
| Connector Configuration | 8+4 Pin |
| Length | 71 mm / 2.80 in |
| Width | 63 mm / 2.48 in |
| Height | 26 mm / 1.02 in |
| Mounting Hole Distance | 86 mm / 3.39 in |
| Housing Material | ABS |
| Application | Yamaha Outboard Motor |
| Condition | New |
| Package Quantity | 1 CDI Unit |
Key Features
- 12-Pin CDI Configuration: Features an 8+4 male connector arrangement for compatible Yamaha ignition systems.
- OEM-Specific Replacement: Designed to replace Yamaha 6F6-85540-00.
- 40HP 2-Stroke Application: Suitable for selected E40, 40MH, E40M, E40W, 40WH, and 40W outboard models.
- Compact Housing: Approximately 71 × 63 × 26mm for comparison with the original module.
- Fitment Reference: 86mm mounting-hole spacing provides an additional physical reference before installation.
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Preguntas frecuentes sobre compatibilidad
¿Esta pieza es compatible con mi modelo y año específicos?
This CDI is designed for selected Yamaha 40HP 2-stroke E40, 40MH, E40M, E40W, 40WH, and 40W outboard applications associated with OEM 6F6-85540-00.
Because the original listing does not specify a complete year range, confirm your engine model code and original CDI rather than relying on horsepower alone.
¿Necesito que coincida el número de pieza OEM?
Yes. Matching the OEM number is strongly recommended.
Primary references:
6F6-85540-00 / 6F6-85540-00-00
If your original CDI carries a different OEM number, verify interchangeability before ordering.
¿Qué modelos o situaciones no son compatibles con esta pieza?
Do not assume this CDI fits:
Every Yamaha 40HP outboard
Yamaha 40HP 4-stroke engines
Outboards using a different CDI OEM number
CDI units using a different connector configuration
Applications without the matching 8+4 pin arrangement
Modules with different mounting dimensions or wiring
Similar horsepower does not guarantee ignition-system compatibility.
¿Qué debo verificar antes de hacer un pedido?
Confirm:
Yamaha outboard model
Complete model code
40HP 2-stroke engine
OEM 6F6-85540-00
12-pin / 8+4 male plug
Connector shape and pin arrangement
Approx. 71 × 63 × 26mm module dimensions
Approx. 86mm mounting-hole distance
Original CDI appearance