CDI Power Pack – Fits Yamaha 75-90 HP Outboards (Replaces 688-85540-15-00, 688-85540-16-00)
CDI Power Pack – Fits Yamaha 75-90 HP Outboards (Replaces 688-85540-15-00, 688-85540-16-00) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
CDI Power Pack – Fits Yamaha 75-90 HP Outboards (Replaces 688-85540...
Product Details
This CDI Power Pack is an essential ignition component designed for reliable performance in Yamaha 2-Stroke outboards, covering 75 HP, 85 HP, and 90 HP models from 1984 through 1996, including standard and Jet variants. It serves as a direct-fit replacement, restoring ignition timing and spark energy for optimal engine operation.
This unit directly replaces Yamaha part numbers 688-85540-15-00 and 688-85540-16-00, along with aftermarket equivalents from Titan (757 Performance) and Sierra (18-5130).
- Engineered for a direct plug-in installation using factory-style connectors.
- New, not remanufactured, ensuring maximum reliability and component lifespan.
- Built to withstand harsh marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 688-85540-15-00 |
| Yamaha | 688-85540-16-00 |
| Titan 757 Performance | 688-85540-15-00 |
| Sierra | 18-5130 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | Outboard | 75 | 2-Stroke | 1994–1996 | 688-85540-15-00, 688-85540-16-00 | E75MLHU, E75MHU models |
| Yamaha | Outboard | 85 | 2-Stroke | 1990–1996 | 688-85540-15-00, 688-85540-16-00 | C85TLRU models |
| Yamaha | Outboard | 90 | 2-Stroke | 1984–1991 | 688-85540-15-00, 688-85540-16-00 | |
| Yamaha | Jet 90 | 90 | 2-Stroke | 1991 | 688-85540-15-00, 688-85540-16-00 |
Technical Specs
- Product Type
- CDI Power Pack / Ignition Control Module
- Installation
- Direct plug-in replacement
- Connection
- Factory-style connectors (8 terminals)
- Housing Material
- Plastic and metal
- Housing Color
- Black
- Dimensions
- 14.0 cm L x 17.0 cm W x 6.0 cm H
- Weight
- 686 g (1.5 lbs)
- Warranty
- 12 months
- Condition
- New unit, not remanufactured
What’s in the Box
- 1 x CDI Power Pack (688-85540-15-00/688-85540-16-00)
Installation Notes
- Disconnect the battery cables to prevent electrical shorts.
- Locate the existing CDI power pack on the engine block. Note the wiring connections.
- Carefully unplug all connectors from the old unit.
- Unbolt and remove the old power pack from its mounting position.
- Mount the new CDI power pack securely in the same location.
- Firmly reconnect the factory wiring harnesses to the corresponding terminals on the new unit.
- Reconnect the battery cables and test engine operation to confirm the repair.
Troubleshooting & FAQ
How do I know if my CDI power pack is failing?
Common signs of a faulty CDI include no-spark conditions, intermittent stalling, engine misfires at high RPM, weak spark, or a complete failure to start. A diagnostic test with a peak-reading voltmeter can help confirm if the unit's output is out of spec.
What's the difference between 688-85540-15-00 and 688-85540-16-00?
The part numbers appear to be interchangeable, with 688-85540-16-00 likely being a later supersession. Both are compatible with the engine models listed. This aftermarket unit is a direct replacement for either OEM part.
Is this a direct plug-in installation?
Yes, this unit is designed with factory-style connectors for a straightforward, plug-in installation with no modification required for the specified models.
Can this part fix an intermittent spark issue?
Yes, a failing power pack is a very common cause of intermittent spark, especially as the engine warms up. Replacing a faulty CDI often resolves these types of ignition problems.
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
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