339-880615T01 Ignition Coil for Mercury | JLM Marine

Ignition Coil for Mercury Outboard – Fits 225–350 HP Models

This ignition coil is designed to fit Mercury outboard engines ranging from 225 HP to 350 HP. Engineered to deliver reliable spark and consistent performance, this replacement part ensures your engine runs smoothly in all conditions.

This part directly replaces OEM part numbers 880615T01 and 339-880615T01, making it a straightforward swap for your original Mercury ignition coil.

• Direct replacement for Mercury outboard ignition systems
• Compatible with high-output engines from 225 HP to 350 HP
• Designed for reliable ignition performance

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 Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

Your order includes:

• 1x Ignition Coil

Installation Guide

1. Disconnect the battery negative terminal to prevent accidental sparks or electrical shorts.
2. Locate the ignition coil on your Mercury outboard engine, typically mounted near the powerhead.
3. Disconnect the electrical connector from the old ignition coil by gently pulling it free.
4. Remove the mounting bolts securing the coil using the appropriate socket or wrench.
5. Carefully lift the old ignition coil away from the mounting bracket.
6. Position the new ignition coil in place, aligning the mounting holes with the bracket.
7. Insert and tighten the mounting bolts to the manufacturer's torque specification.
8. Reconnect the electrical connector to the new ignition coil, ensuring a secure fit.
9. Reconnect the battery negative terminal and perform a visual inspection of all connections.
10. Start the engine and verify proper ignition function and smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this ignition coil fits my Mercury outboard?
A: Cross-reference your engine's part number with the OEM numbers listed (880615T01 or 339-880615T01). You can also check your engine's HP rating—this coil is designed for Mercury models from 225 HP to 350 HP.

Q: What are the signs that my ignition coil needs replacement?
A: Common symptoms include engine misfires, rough idling, difficulty starting, loss of power, or complete failure to start. If your engine runs inconsistently or fails to ignite, the ignition coil may be faulty.

Q: How often should I replace the ignition coil?
A: Ignition coils typically do not have a fixed replacement interval and are replaced as needed when symptoms appear. Regular engine maintenance and inspection can help identify early signs of coil failure.

Q: Is this an OEM part or aftermarket?
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.