582508 777661 Ignition Coil for Johnson Evinrude | JLM Marine

Ignition Coil for Johnson Evinrude Outboard – Fits 4-300 HP Models (1985-2001)

This aftermarket ignition coil is engineered to replace OEM part numbers 582508 and 777661 for OMC Johnson and Evinrude outboard engines. It provides reliable spark delivery across a wide range of horsepower ratings from 4 HP to 300 HP, covering model years 1985 through 2001. Whether you're maintaining a commercial workhorse or a recreational motor, this coil ensures consistent ignition performance.

This replacement directly supersedes multiple Johnson/Evinrude part numbers including 582508, 0582508, 777661, 0777661, 0512227, 512227, 18-5179, and 183-2508, offering broad compatibility across OMC's outboard lineup from the mid-1980s through the late 1990s.

• Direct bolt-on replacement for OEM ignition coils on Johnson and Evinrude outboards
• Compatible with both standard and commercial-rated engine models
• Package includes one complete ignition coil ready for 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 Johnson/Evinrude owners, here's a guide to help you identify your engine's serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

• 1× Ignition Coil
• The package contains all the parts shown in the product images.

Installation Guide

1. Disconnect the battery: Always disconnect the negative battery terminal before beginning any ignition system work to prevent accidental spark or electrical shock.
2. Locate the faulty ignition coil: Consult your engine's service manual or parts diagram to identify the coil position on your engine block.
3. Disconnect the wiring harness: Carefully unplug the connector from the old ignition coil. Note the wire colors or take a photo for reference.
4. Remove mounting fasteners: Use the appropriate socket or wrench to remove the bolts securing the coil to the engine. Keep all hardware for reinstallation.
5. Remove the old coil: Lift the coil away from the mounting surface and inspect the area for corrosion or damage.
6. Prepare the new coil: Compare the new ignition coil with the original to confirm identical mounting holes and connector type.
7. Install the new coil: Position the replacement coil onto the mounting surface, aligning bolt holes carefully.
8. Secure with fasteners: Hand-tighten bolts first, then torque to manufacturer specifications (typically 80-120 in-lbs). Do not overtighten.
9. Reconnect the wiring harness: Plug the connector firmly onto the new coil until you hear or feel a click.
10. Reconnect the battery: Reattach the negative battery terminal securely.
11. Test engine operation: Start the engine and confirm smooth ignition with no misfires. Listen for irregular idle or hesitation.
12. Final inspection: After a short test run, re-check all mounting bolts and electrical connections for tightness and secure seating.

Troubleshooting & FAQ

Q: How do I confirm this ignition coil fits my Johnson or Evinrude engine?
A: Cross-reference your engine's horsepower, model year, and original part number with the compatibility table above. You can also use the Johnson/Evinrude Serial Number Guide to identify your engine's exact model and year.

Q: What are the symptoms of a failing ignition coil?
A: Common signs include hard starting, engine misfires, rough idling, loss of power at higher RPMs, and intermittent stalling. If your engine runs poorly or won't start despite good spark plugs and fuel, the ignition coil is a likely culprit.

Q: How often should I replace my outboard's ignition coil?
A: Ignition coils typically last many years under normal conditions, but exposure to saltwater, moisture, and vibration can shorten their lifespan. Inspect annually and replace if you notice performance issues or visible damage such as cracks, corrosion, or burn marks.

Q: What's the difference between this aftermarket coil 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: Can I install this ignition coil myself, or do I need a mechanic?
A: If you have basic mechanical skills and tools, installation is straightforward—disconnect the battery, unbolt the old coil, swap in the new one, and reconnect. However, professional installation is recommended if you are unfamiliar with ignition systems or lack confidence working with electrical components.

Q: Is this coil compatible with Loop-charged engines?
A: According to the fitment data, this coil is not compatible with Loop-charged 150 HP, 155 HP Commercial, or 175 HP models. Always verify your engine's ignition type before ordering.

Q: OEM vs. 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.