SKU: 99523925596

6F5-85540-22 CDI Box Power Pack for Yamaha K40J E40J E40G EK40J | JLM Marine

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Description

6F5-85540-22 CDI Box Power Pack for Yamaha K40J E40J E40G EK40J | JLM MarineCDI 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,

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

  1. Disconnect the battery and ensure the ignition is off before beginning work.
  2. Locate the existing CDI box on your Yamaha outboard engine.
  3. Carefully disconnect all electrical connectors from the old CDI unit, noting their positions.
  4. Remove any mounting screws or brackets securing the old CDI box in place.
  5. Install the new CDI box in the same location using the original mounting hardware.
  6. Connect all electrical plugs to the corresponding connectors on the new CDI unit.
  7. Double-check that all connections are secure and properly seated.
  8. 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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 99523925596

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4.6 ★★★★★
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robert ferrell
Belleville, US
★★★★★ 5
Good
Color: Black, Size: 6 Panel
Love it , just what so needed , easy to put together (some what ) …
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
C
Verified Purchase
Crimm
Belleville, US
★★★★★ 3
Decent for the price. Instructions suck but most people should be able to figure it out. More below.
Color: Black, Size: 6 Panel, Color: Black, Size: 6 Panel
SUMMARY: 3 stars from me because it's firmly average. It's fine for the price. Assembly and materials are alright but I can see some caveats depending on your circumstances. Assembly instructions do a subpar job of pointing out some details. ASSEMBLY INSTRUCTIONS: Maybe it's because I'm autistic and/or building model kits and assembling stuff is my jam, but I honestly thought people were exaggerating when they were complaining about the instructions and I'd be able to flex my ~superior assembly skills.~ I was wrong! These instructions genuinely suck, and whoever is responsible for making them should be ashamed. The instructions do a poor job of calling out some details regarding orientation of parts, and some of the images do not actually match the physical parts. For example, it does not really outline the assembly of the end panels clearly, and I can see someone accidentally using the wrong poles. I've drawn over a photo to show what you should do to try and make it clearer. Additionally, the manual shows a flathead screw for bolting the feet into position, but the actual screw is not a flathead. It also does not point out the counterbore, so if you aren't paying attention you may put the foot pads onto the wrong side of the foot. It's also missing the fact that you need to use another one of the plastic pieces when you finish assembling a panel. ACTUAL ASSEMBLY & MATERIALS: To their credit, all of my bags were clearly labeled. The assembly process wasn't difficult. It's mostly just tedious and requires a fair amount of space. I was able to assemble it by myself without any real difficulty. However, the way it's assembled means two things. One, the fabric parts aren't removable without disassembly. So if you want to use this in an environment where they would require cleaning, I would seriously recommend looking for another option. Or, you could buy this just to use the frame pieces and then somehow buy or make your own fabric pieces designed to be removable with velcro or something. Two, because of the materials I really don't have a lot of faith in this thing surviving disassembly and reassembly. Like a lot of sorta-cheap-but-convenient furniture, it uses those spring-button connections and plastic inserts with self-tapping screws. Those things are not really meant to be disassembled and rethreaded. It also relies a lot on the tension of the poles and the fabric to keep everything rigid and squared, which I think puts a lot of pressure on the aforementioned buttons, plastic inserts, and the hollow metal rods. So I feel like that will also cause issues with disassembly and reassembly. Basically once this thing is assembled, it's not really meant to be disassembled. The best you can do is spot-clean the fabric if you need to. Speaking of the fabric, I didn't see any labels on them or anything in the manual that says what they are, but they feel like some kind of polyester. They generate static electricity pretty easily, and pet hair and debris sticks easily. So that's another downside of them not being easily removable. For the most part it does seem pretty stable. The poles seem to be pretty uniform in length so they're all making contact with my floor. Obviously this isn't structural so it shouldn't be supporting anything, but the two main feet seem to be doing fine with keeping this thing upright. CLOSING THOUGHTS: Really, it's fine for what it is, but it could be better in a lot of little ways and the substandard quality of the instructions just seems unprofessional to me, which is why I'm being so harsh with my rating. Depending on your needs and environment you may want to consider a different option. Preferably one that is made to be disassembled with better materials, and/or one with fabric pieces made to be removed easily.
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Reviewed in the United States on May 28, 2023
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Verified Purchase
Barb
Houston, US
★★★★★ 1
Not as it seems
Color: Black, Size: 6 Panel
these are awful... Each individual panel is fine, but when you put it together it can barely stand up, and the clips that hold it together keep popping off. Steer clear of this item.
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Reviewed in the United States on April 7, 2026
T
Verified Purchase
Timothy Beckner
West Palm Beach, US
★★★★★ 5
As described
Color: White, Size: 6 Panel
Works great in my clinic
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Reviewed in the United States on May 17, 2026
A
Verified Purchase
A.Rahman
New York, US
★★★★★ 5
Excellent
Size: 3 Panels, Color: Grey
Very good quality, sturdy, and easy to install. Blocks light very efficiently; non-see-through fabrics. Excellent quality for the price. Highly recommend it.
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Reviewed in the United States on April 30, 2026

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