Ignition Coil Assembly – Fits Yamaha 6HP, 8HP, 9.9HP, 15HP, 20HP, 25HP Outboard Motors (Replaces 6B4-85570-00, 6B4-85530-00)
Ignition Coil Assembly – Fits Yamaha 6HP, 8HP, 9.9HP, 15HP, 20HP, 25HP Outboard Motors (Replaces 6B4-85570-00, 6B4-85530-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Ignition Coil Assembly is designed for a wide range of Yamaha 2-Stroke & 4-Stroke outboard motors, including 6HP (2000–2010), 8HP (2001–2017), 9.9HP (2003–2017), 15HP (2003), 20HP (1996–2002), and 25HP (1996–2001) models.
It serves as a direct interchange for Yamaha part numbers 6B4-85570-00, 6B4-85530-00, 680-85570-00, and 680-85570-02.
- Offers a direct OEM replacement installation for a hassle-free fit.
- Constructed from durable rubber and metal to meet OEM specifications.
- Engineered to provide stable performance and reliable ignition.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6B4-85570-00 |
| Yamaha | 6B4-85530-00 |
| Yamaha | 680-85570-00 |
| Yamaha | 680-85570-02 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | E9.9D MHS/L | 9.9 | 2-Stroke | 2003 | 6B4-85570-00 | |
| Yamaha | E15D MHS/L/XL | 15 | 2-Stroke | 2003 | 6B4-85570-00 | |
| Yamaha | F6 MS/LH | 6 | 4-Stroke | 2001–2005, 2008 | 6B4-85570-00 | |
| Yamaha | F6A MHS/L | 6 | 4-Stroke | 2000–2005, 2009–2010 | 6B4-85570-00 | |
| Yamaha | F8 | 8 | 4-Stroke | 2008–2017 | 6B4-85570-00 | |
| Yamaha | T8 | 8 | 4-Stroke | 2001–2012 | 6B4-85570-00 | |
| Yamaha | FT8D | 8 | 4-Stroke | 2001–2017 | 6B4-85570-00 | |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 2009–2017 | 6B4-85570-00 | |
| Yamaha | FT9.9 | 9.9 | 4-Stroke | 2009–2017 | 6B4-85570-00 | |
| Yamaha | 20C MHS/L | 20 | 2-Stroke | 1996–1998, 2001–2002 | 6B4-85570-00 | |
| Yamaha | C25 ES/LH | 25 | 2-Stroke | 1996–1997 | 6B4-85570-00 | |
| Yamaha | C25 MS/LH | 25 | 2-Stroke | 1996–1997 | 6B4-85570-00 | |
| Yamaha | 25D (E)MHS/L | 25 | 2-Stroke | 1997–1998, 2001 | 6B4-85570-00 |
Technical Specs
- Product Type
- Ignition Coil Assembly
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Housing Material
- Rubber + Metal
- Dimensions
- 16.0cm L x 4.0cm W x 14.0cm H
- Performance
- Meets OEM specifications for stable performance
What’s in the Box
- 1 x Ignition Coil Assembly (Replaces 6B4-85570-00 / 6B4-85530-00)
Installation Notes
- Disconnect the negative battery terminal and ensure the engine is completely cool before starting.
- Carefully locate the old ignition coil and disconnect the spark plug wire(s) and electrical connectors attached to it.
- Unbolt and remove the old ignition coil assembly from its mounting bracket. Note its orientation.
- Mount the new ignition coil assembly securely in the same position as the original.
- Reconnect the electrical connectors and firmly attach the spark plug wire(s) to the new coil.
- Reconnect the battery terminal, start the engine, and check for proper operation.
Troubleshooting & FAQ
How do I know if my ignition coil has failed?
Common signs of a failing ignition coil include engine misfires (especially under load), difficulty starting, stalling, reduced power, backfiring, and poor fuel economy. A diagnostic check may show fault codes related to the ignition system.
Will this fit a model/year not on the compatibility list?
We can only guarantee fitment for the specific models and years detailed in the Engine Compatibility table. To avoid ordering the wrong part, please verify the OEM part number stamped on your original coil matches one of the numbers in our Part Number Matrix.
Is this a high-output or performance coil?
This is a standard replacement coil built to match original factory specifications. It is not a high-output or performance-enhancing part but is designed to restore original ignition performance reliably.
What is the difference between this part and OEM?
This is an aftermarket part engineered to provide the same fit, form, and function as the original equipment manufacturer (OEM) part. It is made with comparable materials to offer a reliable, cost-effective alternative.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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