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Ignition Coil Assembly for Yamaha Outboard 9.9HP 15HP 20HP (66M-85570 Series)
Ignition Coil Assembly for Yamaha Outboard 9.9HP 15HP 20HP (66M-85570 Series)
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Product Overview
Restore reliable ignition performance to your Yamaha outboard engine with this high-quality ignition coil assembly, designed as a direct replacement for OEM 66M-85570 series.
Engineered for Yamaha 9.9HP, 15HP, and 20HP outboard motors (1998–2006), this coil delivers stable spark output, fast starting, and smooth engine operation across all RPM ranges.
Built with high-temperature resistant insulation and durable copper windings, it is designed to withstand saltwater exposure, humidity, and continuous marine vibration.
Designed to eliminate no-spark, weak ignition, and hard-start issues in Yamaha small horsepower outboard engines.
Product Compatibility
| Brand | Engine Type | Horsepower | Model Variants | Year Range | OEM Reference |
|---|---|---|---|---|---|
| Yamaha | Outboard 2/4-stroke | 9.9HP | Standard models | 2005–2006 | 66M-85570 |
| Yamaha | Outboard 2/4-stroke | 15HP | Standard models | 1998–2006 | 66M-85570-00 / -01 / -02 / -03 |
| Yamaha | Outboard 2/4-stroke | 20HP | MS / LH / ES / LR / EHS / L | 1998–2006 | 66M-85570 series |
OEM / Reference
OEM Part Numbers: 66M-85570, 66M-85570-00, 66M-85570-01, 66M-85570-02, 66M-85570-03
Specifications
| Specification | Details |
|---|---|
| Product Type | Ignition Coil Assembly |
| Engine Type | Yamaha Outboard Motor |
| Horsepower Range | 9.9HP / 15HP / 20HP |
| Ignition System | CDI (Capacitor Discharge Ignition) |
| Material | High-grade copper windings |
| Insulation | Heat-resistant marine-grade material |
| Protection | Built-in over-voltage protection |
| Installation | Direct plug-and-play replacement |
| Application | Marine ignition system |
Key Features
- Designed for Yamaha 9.9HP / 15HP / 20HP outboard engines
- Direct OEM replacement for 66M-85570 series
- Stable ignition output for smooth engine operation
- Heat-resistant and vibration-proof construction
- Built-in over-voltage protection circuit
- Improved fuel efficiency and starting reliability
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Fitment FAQ
Will this part fit my specific model and year?
This ignition coil is intended for Engine Type; Horsepower; Model Variants; OEM Reference; Yamaha; Outboard 2/4-stroke; 9.9HP. Listed year information includes 1998–2006, 2005–2006, 1998, 2006, 2005. It is best matched to original part number(s) 66M-85570, 66M-85570-00, 66M-85570-01, 66M-85570-02. Key physical/spec details from the product data include 9.9HP, 15HP, 20HP. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 66M-85570, 66M-85570-00, 66M-85570-01, 66M-85570-02 before purchase. For this ignition coil, also compare the OEM number, plug/boot style, wire length, mounting hole distance, primary connector type, and engine ignition system. This is especially important for Yamaha models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this ignition coil for machines outside the listed compatibility, or for units with different plug boots, wire lengths, primary connectors, mounting-hole spacing, or ignition system types. If your original part number does not cross-reference with 66M-85570, 66M-85570-00, 66M-85570-01, 66M-85570-02, treat the fitment as unconfirmed. Model years outside 1998–2006, 2005–2006, 1998, 2006, 2005 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the OEM number, plug/boot style, wire length, mounting hole distance, primary connector type, and engine ignition system. Confirm OEM/cross-reference number(s): 66M-85570, 66M-85570-00, 66M-85570-01, 66M-85570-02. Recheck listed specs such as 9.9HP, 15HP, 20HP. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.