Ignition Coil – Fits Yamaha Outboard 9.9HP-40HP (Replaces 66M-85570-00-00, 6F5-85570-10, 6F5-85570-11, 6F5-85570-12, 6F5-85570-13)
Ignition Coil – Fits Yamaha Outboard 9.9HP-40HP (Replaces 66M-85570-00-00, 6F5-85570-10, 6F5-85570-11, 6F5-85570-12, 6F5-85570-13) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Ignition Coil – Fits Yamaha Outboard 9.9HP-40HP (Replaces 66M-85570...
Ignition Coil – Fits Yamaha Outboard 9.9HP-40HP (Replaces 66M-85570-00-00, 6F5-85570-10, 6F5-85570-11, 6F5-85570-12, 6F5-85570-13) is backordered and will ship as soon as it is back in stock.
Product Details
This replacement Ignition Coil – Fits Yamaha Outboard 9.9HP 15HP 20HP 25HP 30HP 40HP (Replaces 66M-85570-00-00) is designed for a broad range of Yamaha 2-stroke and 4-stroke outboard engines from 1989 through 2009. It provides a reliable, high-performance spark for efficient engine operation.
It serves as a direct interchange for Yamaha part numbers 66M-85570-00-00, 66M-85570, 6F5-85570-10, 6F5-85570-11, 6F5-85570-12, and 6F5-85570-13.
- Engineered for direct-fit installation.
- Constructed with high-grade electronic components for durability.
- Package includes one ignition coil.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 66M-85570-00-00 |
| Yamaha | 66M-85570 |
| Yamaha | 6F5-85570-10 |
| Yamaha | 6F5-85570-11 |
| Yamaha | 6F5-85570-12 |
| Yamaha | 6F5-85570-13 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is verified for the following Yamaha 2-Stroke outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 9.9 ES/LH | 9.9 | 2-Stroke | 1996–1997 | 66M-85570-00-00 | |
| Yamaha | 9.9 MS/LH | 9.9 | 2-Stroke | 1996–2009 | 66M-85570-00-00 | |
| Yamaha | 15 ES/LH | 15 | 2-Stroke | 1996 | 66M-85570-00-00 | |
| Yamaha | 15 MS/LH | 15 | 2-Stroke | 1996–2000 | 66M-85570-00-00 | |
| Yamaha | 15 MSH | 15 | 2-Stroke | 2001–2009 | 66M-85570-00-00 | |
| Yamaha | 20 MS/LH | 20 | 2-Stroke | 1996–1997 | 66M-85570-00-00 | |
| Yamaha | 25 ES/LH | 25 | 2-Stroke | 1994–2009 | 66M-85570-00-00 | |
| Yamaha | 25 MS/LH | 25 | 2-Stroke | 1994–2009 | 66M-85570-00-00 | |
| Yamaha | C30 ES/LR | 30 | 2-Stroke | 1993–1997 | 66M-85570-00-00 | |
| Yamaha | C30 MHS/L | 30 | 2-Stroke | 1994 | 66M-85570-00-00 | |
| Yamaha | C40 TS/LR | 40 | 2-Stroke | 1997–2003 | 63V-85570-00-00 | Alternative fitment |
| Yamaha | 40 ETL/UL | 40 | 2-Stroke | 1989–1997 | 66M-85570-00-00 | |
| Yamaha | 40 ML/ULH | 40 | 2-Stroke | 2000–2001 | 66M-85570-00-00 | |
| Yamaha | 40 MS/L/ULH | 40 | 2-Stroke | 1991–1997 | 66M-85570-00-00 | |
| Yamaha | 40 PLR | 40 | 2-Stroke | 1992–1994 | 66M-85570-00-00 | |
| Yamaha | 40 PS/LR | 40 | 2-Stroke | 1991 | 66M-85570-00-00 | |
| Yamaha | 40 S/L/UL | 40 | 2-Stroke | 1989 | 66M-85570-00-00 | |
| Yamaha | 40 TL/UL(H)R | 40 | 2-Stroke | 1994–2005 | 66M-85570-00-00 | |
| Yamaha | P40 TL/UL(H)R | 40 | 2-Stroke | 1998 | 66M-85570-00-00 |
This part is also listed as compatible with the following Yamaha 4-Stroke models. Note: Specific model years are unconfirmed; verify by part number.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F9.9 | 9.9 | 4-Stroke | 6F5-85570-10/11/12/13 | |
| Yamaha | F13.5 | 13.5 | 4-Stroke | 6F5-85570-10/11/12/13 | |
| Yamaha | F15 | 15 | 4-Stroke | 6F5-85570-10/11/12/13 | |
| Yamaha | F20 | 20 | 4-Stroke | 6F5-85570-10/11/12/13 | |
| Yamaha | F25 | 25 | 4-Stroke | 6F5-85570-10/11/12/13 | |
| Yamaha | F40 | 40 | 4-Stroke | 6F5-85570-10/11/12/13 |
Technical Specs
- Product Type
- Ignition Coil
- Installation
- Direct fit
- Fuel Type
- Gasoline
- Housing Material
- High-grade electronic components
- Other Technical Attributes
- High-performance ignition coil for efficient spark generation
- Warranty
- 1 Year (on Yarwor/Yalume models)
What’s in the Box
- 1 x Ignition Coil (Replaces 66M-85570-00-00)
Installation Notes
- Disconnect the battery terminals to prevent electrical hazards.
- Locate and disconnect the spark plug wire(s) from the old ignition coil.
- Unplug the low-voltage electrical connector from the coil.
- Unbolt and remove the old ignition coil from its mounting bracket.
- Clean the mounting area of any dirt or corrosion.
- Mount the new ignition coil, ensuring all bolts are securely tightened.
- Reconnect the low-voltage electrical connector.
- Firmly reattach the spark plug wire(s).
- Reconnect the battery terminals and test the engine.
Troubleshooting & FAQ
How do I know if my ignition coil needs replacement?
Common signs of a failing ignition coil include engine misfires, difficulty starting, rough idling, reduced power, poor fuel economy, or the check engine light illuminating. A simple spark test can often confirm a weak or non-existent spark.
What is the difference between part numbers 66M-85570-00-00 and 6F5-85570-10?
Part number 66M-85570-00-00 is primarily associated with 2-stroke Yamaha models, while the 6F5-85570 series (including -10, -11, etc.) is typically for 4-stroke models. However, this aftermarket part is designed to be a functional replacement for both series within the specified HP ranges.
Will this fit a 50HP Yamaha model?
While some sources suggest potential compatibility with certain 50HP models, our verified data only covers up to 40HP. We cannot guarantee fitment on 50HP engines. Please purchase based only on confirmed model compatibility.
Is this a single or double ignition coil?
This is a single ignition coil unit. Depending on your engine design, you may have one or more coils. This part replaces one individual coil.
What is the recommended replacement interval for an ignition coil?
Ignition coils do not have a strict replacement interval and are typically replaced only when they fail. They are designed to last for many years under normal operating conditions.
Is any special tool required for installation?
No special tools are typically required. Basic hand tools such as a socket set or wrenches to unbolt the coil and pliers for electrical connectors are usually sufficient.
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.
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