CDI Ignition Pack – Fits Yamaha 4-5 HP Outboards (Replaces 6E0-85540-70-00, 6E0-85540-71-00)
CDI Ignition Pack – Fits Yamaha 4-5 HP Outboards (Replaces 6E0-85540-70-00, 6E0-85540-71-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
CDI Ignition Pack – Fits Yamaha 4-5 HP Outboards (Replaces 6E0-8554...
Product Details
This aftermarket CDI Ignition Pack – Fits Yamaha 4-5 HP Outboards (Replaces 6E0-85540-70-00, 6E0-85540-71-00) is designed for single-cylinder, 2-stroke Yamaha 4 HP and 5 HP outboard engines from 1984–2001. It also fits select Mercury-branded Yamaha models. Engineered for reliability, it restores spark and engine performance.
This unit is a direct interchange for Yamaha part numbers 6E0-85540-70-00 and 6E0-85540-71-00, Mercury 91707 and 91707M, and CDI Electronics 117-6E0-71.
- Features a direct plug-in harness for simple installation.
- Epoxy-encapsulated housing protects against moisture and vibration.
- Covered by a standard 2-year manufacturer warranty.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6E0-85540-70-00 |
| Yamaha | 6E0-85540-71-00 |
| Mercury | 91707 |
| Mercury | 91707M |
| CDI Electronics | 117-6E0-71 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This ignition pack is verified to fit the following Yamaha 1-cylinder, 2-stroke outboards.
It is also compatible with select Mercury-branded Yamaha 4-5 HP engines requiring OEM Part No. 91707 or 91707M.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | LN, SN | 4 | 2-Stroke | 1984 | 6E0-85540-70-00, 6E0-85540-71-00 | |
| Yamaha | LK, SK | 4 | 2-Stroke | 1985 | 6E0-85540-70-00, 6E0-85540-71-00 | |
| Yamaha | LJ, SJ | 4 | 2-Stroke | 1986 | 6E0-85540-70-00, 6E0-85540-71-00 | |
| Yamaha | LH, SH | 4 | 2-Stroke | 1987 | 6E0-85540-70-00, 6E0-85540-71-00 | |
| Yamaha | SN, SK, LN, LK | 5 | 2-Stroke | 1984–1985 | 6E0-85540-70-00, 6E0-85540-71-00 | |
| Yamaha | ML, MS | 5 | 2-Stroke | 1991–2001 | 6E0-85540-70-00, 6E0-85540-71-00 | Also fits 2002 per some sources |
| Yamaha | LD, LF, LG, LK, LN | 4 | 2-Stroke | 1984–2001 | 6E0-85540-70-00, 6E0-85540-71-00 | Additional models per Amazon listing |
| Yamaha | SD, SF, SG, SK, SN | 4 | 2-Stroke | 1984–2001 | 6E0-85540-70-00, 6E0-85540-71-00 | Additional models per Amazon listing |
Technical Specs
- Product Type
- CDI Ignition Module (Power Pack)
- Application
- Single cylinder
- Installation
- Direct OEM replacement
- Connection
- Plug-in harness connector
- Housing
- Plastic with epoxy encapsulation
- Housing Color
- Black
- Dimensions
- 9.5" L x 11.0" W x 6.5" H
- Warranty
- 2 years (CDI Electronics standard warranty)
What’s in the Box
- 1 x CDI Ignition Module (117-6E0-71)
Installation Notes
- Disconnect the negative terminal of the boat's battery before starting work.
- Locate the existing CDI module on the engine block. Note the routing of its wires.
- Carefully disconnect the electrical harness connector from the old module.
- Unbolt and remove the old CDI module from its mounting point.
- Clean the mounting surface to ensure a solid connection for the new part.
- Mount the new CDI module securely using the original hardware.
- Firmly connect the new module's plug-in harness to the engine-side connector.
- Reconnect the battery, start the engine, and verify proper operation.
Troubleshooting & FAQ
How do I know if my CDI ignition pack is failing?
Common symptoms of a bad CDI pack include the engine refusing to start, intermittent or no spark at the spark plug, engine misfires at high RPM, or stalling after warming up. Performing a resistance or voltage test with a multimeter can help diagnose the issue definitively.
Is this a plug-and-play part?
Yes, this CDI module is designed as a direct, plug-in replacement. It uses an OEM-style harness connector, requiring no wire splicing or modifications for installation on compatible engine models.
Will this fit my 2002 Yamaha 5HP engine?
The confirmed compatibility range is 1984–2001. While some sources suggest it may fit 2002 Yamaha ML/MS models, we recommend verifying that your original part number is an exact match to 6E0-85540-70-00 or 6E0-85540-71-00 before ordering for models outside the specified years.
Does this fit Mercury-branded engines?
Yes, it is compatible with certain Mercury-branded outboards that were manufactured by Yamaha and use the Mercury OEM part numbers 91707 or 91707M. Always cross-reference your specific part number to ensure correct fitment.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
