695-85540-11-00 CDI Unit Assembly for Yamaha 9.9 15 25 C25 CV25 | JLM Marine

CDI Unit Assembly for Yamaha 9.9 15 25 C25 CV25 HP 2-Stroke Outboard Motors

This CDI Unit Assembly is engineered to fit Yamaha 2-cylinder, 2-stroke outboard motors rated at 9.9HP, 15HP, and 25HP, including C25 and CV25 models manufactured between 1984 and 1997. It ensures reliable ignition timing and optimal engine performance across a wide range of vintage and mid-generation Yamaha outboards.

This unit directly replaces Yamaha OEM part numbers 695-85540-10-00, 695-85540-11-00, and 695-85540-12-00, as well as aftermarket equivalents including Sierra Marine 18-5131. It provides a cost-effective solution for restoring ignition function without compromising reliability.

• Fits Yamaha 2-cylinder, 2-stroke outboards from 1984 to 1997
• Direct plug-and-play replacement for multiple OEM part numbers
• Includes color-coded wiring for straightforward installation

Part Number Cross-Reference

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

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.

Technical Specifications

Package Contents

Your purchase includes:

• 1 × CDI Unit Assembly

Installation Guide

1. Disconnect the battery to ensure safe working conditions and prevent electrical shorts.
2. Disconnect all wires from the old CDI unit and carefully remove it from the engine mounting location.
3. Thoroughly clean all ground connections and the mounting area to ensure optimal conductivity and secure fitment.
4. Install the new CDI unit using the original mounting bolts; tighten securely but do not over-torque.
5. Connect the White/Red wire from the CDI to the trigger (pulsar) coil.
6. Connect the Brown and Blue wires from the CDI to the charge coil terminals.
7. Connect the Black wire to the engine ground and the plate ground as specified in your engine's wiring diagram.
8. Connect the Orange and Black wires to the ignition coil terminals.
9. Connect the White stop (kill) wire to the engine harness or stop circuit to enable engine shutdown functionality.
10. Double-check all connections for proper seating and correct color matching to avoid ignition or starting issues.
11. Reconnect the battery and verify that all terminals are clean and tight.
12. Test engine start and idle to confirm proper CDI function; listen for smooth operation and consistent firing.

Troubleshooting & FAQ

Q: How do I confirm this CDI unit fits my Yamaha outboard?
A: Check the compatible engine models table above for your engine's HP rating, model designation (9.9, 15, C25, CV25), and year range (1984–1997). You can also cross-reference your existing CDI's part number with the OEM numbers listed (695-85540-10, -11, -12) or use Yamaha's serial number guide and parts diagrams linked in the compatibility section.

Q: What are the symptoms of a failing CDI unit?
A: Common signs include difficulty starting, rough idle, misfiring at various RPMs, complete loss of spark, or the engine cutting out unexpectedly. If you've ruled out spark plugs, ignition coils, and fuel delivery issues, the CDI is often the next component to inspect.

Q: Can I install this CDI unit myself, or do I need a marine technician?
A: If you have basic electrical knowledge and can follow a wiring diagram, installation is straightforward—disconnect the battery, swap the old unit, match wire colors, and reconnect. However, if you're unfamiliar with outboard ignition systems or uncomfortable working with electrical components, we recommend professional installation to ensure safety and proper function.

Q: How does this aftermarket CDI compare to the Yamaha OEM unit?
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.