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6F5-85540-22 CDI Box Power Pack for Yamaha K40J E40J E40G EK40J | JLM Marine
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- $27.99
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CDI Box Power Pack for Yamaha K40J E40J E40G EK40J | JLM Marine
This CDI Box Power Pack is engineered to fit Yamaha 2-stroke 40HP outboard engines, including K40J (1993-2002), E40J (2003), E40G (2003), and EK40J (2003) models. Designed to deliver reliable ignition performance, this aftermarket replacement ensures your engine fires consistently and runs smoothly.
This unit directly replaces OEM part numbers 6F5-85540-22, 6F5-85540-21, and 6F6-85540-00, providing a cost-effective solution without sacrificing quality or reliability.
- CDI igniter provides sufficient energy to ignite fuel and stabilize flame instantly
- Plug-and-play installation with all necessary connectors included
- Low heat and low power consumption for efficient operation
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 6F5-85540-22 |
| Yamaha | 6F5-85540-21 |
| Yamaha | 6F6-85540-00 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | Years |
|---|---|---|---|---|
| Yamaha | K40J | 40 | 2 | 1993-2002 |
| Yamaha | E40J | 40 | 2 | 2003 |
| Yamaha | E40G | 40 | 2 | 2003 |
| Yamaha | EK40J | 40 | 2 | 2003 |
Technical Specifications
| Specification | Value |
|---|---|
| Material | Plastic |
| Features | Low heat, low power consumption, plug-and-play connectors |
| Function | Provides ignition energy and stabilizes flame |
Package Contents
- 1 x CDI Igniter
- The package contains all the parts shown in the product images
Installation Guide
- Disconnect the battery and ensure the ignition is off before beginning work.
- Locate the existing CDI box on your Yamaha outboard engine.
- Carefully disconnect all electrical connectors from the old CDI unit, noting their positions.
- Remove any mounting screws or brackets securing the old CDI box in place.
- Install the new CDI box in the same location using the original mounting hardware.
- Connect all electrical plugs to the corresponding connectors on the new CDI unit.
- Double-check that all connections are secure and properly seated.
- Reconnect the battery and test the ignition system to ensure proper operation.
Troubleshooting & FAQ
Q: How do I confirm this CDI box fits my Yamaha engine?
A: Cross-reference your engine model and year with the compatibility table above. Also verify your original part number matches 6F5-85540-22, 6F5-85540-21, or 6F6-85540-00.
Q: What are the signs that my CDI box is failing?
A: Common symptoms include difficulty starting, misfiring, irregular idling, loss of power at high RPM, or the engine cutting out unexpectedly. If you experience these issues, inspect the CDI unit and related ignition components.
Q: Can I install this myself or do I need a professional?
A: If you have basic mechanical skills and are comfortable working with electrical connections, installation is straightforward with plug-and-play connectors. However, professional installation is recommended to ensure safety and optimal performance.
Q: How often should I replace the CDI box?
A: CDI boxes typically do not require routine replacement unless they fail. Replace the unit if you experience ignition-related problems or if diagnostic testing indicates a faulty CDI.
Q: What's the difference between this aftermarket CDI and the OEM version?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
Parts Finder
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Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
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