688-85540-16 CDI Unit Assembly for Yamaha 90 ETL/XL C75 TLR E75 MLH 75A E(M/H/D/T)L 80A E(M)TOL/UL C85 TLR CV85 ETL 85A ET(D)L/X 90 TL/XLR 90A ETOL/XL | JLM Marine
SKU: 91558883788

688-85540-16 CDI Unit Assembly for Yamaha 90 ETL/XL C75 TLR E75 MLH 75A E(M/H/D/T)L 80A E(M)TOL/UL C85 TLR CV85 ETL 85A ET(D)L/X 90 TL/XLR 90A ETOL/XL | JLM Marine

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Description

688-85540-16 CDI Unit Assembly for Yamaha 90 ETL/XL C75 TLR E75 MLH 75A E(M/H/D/T)L 80A E(M)TOL/UL C85 TLR CV85 ETL 85A ET(D)L/X 90 TL/XLR 90A ETOL/XL | JLM MarineCDI Unit Assembly Fits Yamaha 75HP90HP Outboards (19841996) This aftermarket CDI Unit Assembly is engineered to replace OEM part numbers 688 85540 15 and 688 85540 16 for Yamaha outboard engines ranging from 75HP to 90HP across multiple model series produced between 1984 and 1996. Designed to deliver reliable ignition performance, this CDI box provides the precise energy needed to ignite fuel and stabilize the flame, ensuring smooth engine operation

CDI Unit Assembly – Fits Yamaha 75HP–90HP Outboards (1984–1996)

This aftermarket CDI Unit Assembly is engineered to replace OEM part numbers 688-85540-15 and 688-85540-16 for Yamaha outboard engines ranging from 75HP to 90HP across multiple model series produced between 1984 and 1996. Designed to deliver reliable ignition performance, this CDI box provides the precise energy needed to ignite fuel and stabilize the flame, ensuring smooth engine operation across a wide range of conditions.

This unit is a direct replacement for Yamaha part numbers 688-85540-15 and 688-85540-16, offering broad compatibility with C75, E75, 75A, 80A, C85, CV85, 85A, and 90/90A series engines. Built from durable plastic materials and equipped with plug-and-play connectors, it ensures straightforward installation with low heat generation and reduced power consumption.

  • Plug-and-play design: Pre-wired connectors for direct installation without modifications
  • Low heat & power consumption: Engineered for efficient, reliable ignition performance
  • Durable construction: High-quality plastic housing ensures long-lasting durability in marine environments

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket sources.

Brand Part Number
Yamaha OEM 688-85540-15
Yamaha OEM 688-85540-16

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 Years
Yamaha 90 ETL/XL 90HP 1984–1987
Yamaha C75 TLR 75HP 1994–1996
Yamaha E75 MLH 75HP 1995–1996
Yamaha 75A E(M/H/D/T)L 75HP 1990–1996
Yamaha 80A E(M)TOL/UL 80HP 1988–1991
Yamaha C85 TLR 85HP 1991–1996
Yamaha CV85 ETL 85HP 1989–1990
Yamaha 85A ET(D)L/X 85HP 1990–1996
Yamaha 90 TL/XLR 90HP 1991
Yamaha 90 ETL/XL 90HP 1988–1990
Yamaha 90A ETOL/XL 90HP 1988–1991

Technical Specifications

Specification Value
OEM Number 688-85540-16
Material High-strength plastic
Function CDI ignition control unit
Connection Type Plug-and-play connectors
Heat Generation Low
Power Consumption Low

Package Contents

Your package includes:

  • 1 × CDI Igniter Unit Assembly

The package contains all components shown in the product images.

Installation Guide

  1. Disconnect the battery: Always disconnect the negative terminal before working on the ignition system to prevent electrical shock or accidental sparking.
  2. Locate the existing CDI unit: Refer to your engine's service manual or wiring diagram to identify the CDI box mounting location.
  3. Disconnect the wiring harness: Carefully unplug all connectors from the old CDI unit. Note the orientation and position of each connector.
  4. Remove the mounting hardware: Unscrew or unclip the old CDI unit from its bracket or mounting surface.
  5. Install the new CDI unit: Position the replacement unit in the same location and secure it with the original mounting hardware.
  6. Reconnect all connectors: Plug each connector into the corresponding terminal on the new CDI unit, ensuring a firm, secure fit.
  7. Reconnect the battery: Reattach the negative battery terminal.
  8. Test engine operation: Start the engine and verify smooth idle, acceleration, and overall ignition performance. If issues persist, recheck all connections.

Troubleshooting & FAQ

Q: How do I confirm this CDI unit fits my Yamaha engine?
A: Cross-reference your engine model and year with the compatibility table above. Also verify that your current CDI unit has part number 688-85540-15 or 688-85540-16 stamped on its casing.

Q: What are the signs that my CDI unit is failing?
A: Common symptoms include difficulty starting, misfiring, rough idle, loss of power at high RPM, or the engine cutting out intermittently. If ignition coils and spark plugs are in good condition but problems persist, the CDI may be faulty.

Q: How often should I replace the CDI unit?
A: CDI units typically last many years under normal operating conditions. Replace only when you experience ignition failure or erratic performance that cannot be traced to spark plugs, coils, or wiring issues.

Q: Can I install this CDI unit myself?
A: Yes, installation is straightforward with basic hand tools and a plug-and-play design. However, if you are unfamiliar with marine electrical systems, professional installation is recommended to ensure safety and proper function.

Q: Is this an OEM or aftermarket part?
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: 91558883788

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Amazon Customer
Bozeman, US
★★★★★ 5
Great for mental stimulation. Durable for my chewers!
Color: Purple Lil Snoop, Color: Purple Lil Snoop
Love these! Quality material, safe for dogs — I make my dogs home made freezer treats and fill these up with it, and serve. Keeps them busy for hours. It’s also fun for them to roll it around to get regular treats out of. Toy + treats = a very happy pup. This size I got for my puppy. The larger ones I use for my adult dogs. Super cute too, and silent! I have Mini Aussies, so it’s great mental stimulation for them. Tires them out.
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Reviewed in the United States on April 7, 2026
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Robyn Kanouse
Cuba, US
★★★★★ 5
Very durable
Color: Blue
I have never written a review but just have to say how much our Pitbull LOVES this toy. It is very sturdy very good since he is such an aggressive chewer. This is only the second product I have found that he can’t destroy in 5 minutes. It keeps him busy for a long time and plays with it long after the treats are gone which is good as too many treats and he would gain weight. Highly recommend it. He weighes 70 lbs and the largest one is the perfect size. Kibble doesn’t work as it empties out immediately. I use Beggin Strips cut to size just to fit in the hole—they will come out but not all at once and survive his chewing on the toy.
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Reviewed in the United States on March 8, 2026
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Caleigh Meyer
Alexandria, US
★★★★★ 4
Overall good toy for dogs
Color: Blue
My dog loves her snoop. I put little training treats in there for her, and she loves to roll it around and get the treats out. For her, it doesn’t last very long because they do fall out pretty easy, but she is a big dog so a smaller dog might have a harder time than her. Very sturdy and easy to travel with. Not noisy at all. I would say it’s a good, quick play toy for a dog like mine.
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Reviewed in the United States on April 14, 2026
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Anel
West Palm Beach, US
★★★★★ 5
Fav Chew Toy 🦴
Color: Blue, Color: Blue
My baby is half rottweiler and half doberman &’ he has a pretty strong grip when it comes to chew toys. But this one, it’s his favorite toy! He never leaves the house without it. It’s also really fun to add his favorite treats in there when’s he bored to keep him entertained! Not loud at all and will keep him from chewing on other things and not heavy as other rough chew toys!
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Reviewed in the United States on May 31, 2026
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Love for Design
Louisville, US
★★★★★ 5
Great you made super well
Color: Blue Lil Snoop, Color: Blue Lil Snoop
This is such an awesome toy. It’s super durable strong bounces and a perfect size. We got the small. We got blue because our pup can see it. It allows for creativity and endless limits to what you can make for it to be a fun experience. It has a nice sized hole in the center which allows you to add treats and food. Pop it inward and it slightly if large enough prevents the treats from coming out super fast. The ball rolls bounces and they can grip it nicely. It is easy to clean The only thing I didn’t like was the way the plastic tabs were situated inside the toy as you just be careful you don’t allow it to drip inside and dog gets it. No noise just fun. Our 15lb Cavapoo loves it
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Reviewed in the United States on February 17, 2026

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