12" Spark Plug Ignition Coil Wires – Fits Johnson/Evinrude V4-V6 Outboards 10-235 HP (Replaces 582365, 18-8818)

12" Spark Plug Ignition Coil Wires – Fits Johnson/Evinrude V4-V6 Outboards 10-235 HP

This set of 12-inch spark plug ignition coil wires is designed to fit a wide range of Johnson/Evinrude V4 and V6 outboard engines, primarily from the 1980s and 1990s, covering 10 HP to 235 HP models. They provide a reliable connection between the ignition coil and spark plug for optimal engine performance.

These wires serve as a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility. Please verify your specific part number before ordering.

• Installation: Direct OEM-style replacement.
• Material: High-temperature silicone housing with stainless steel conductors.
• Package Includes: Four 12" spark plug wires.

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

• 4 x 12" Spark Plug Ignition Coil Wires (Replaces 18-8818 / 582365)

Installation Guide

1. Safety First: Ensure the engine is off and cool. Disconnect the negative battery terminal to prevent electrical shocks.
2. Locate Wires: Identify the spark plug wires connecting the ignition coils to the spark plugs.
3. Remove One by One: To avoid mixing up firing order, remove and replace one wire at a time. Gently twist and pull the boot from both the spark plug and the coil.
4. Compare and Match: Match the length of the new wire to the old one you just removed.
5. Install New Wire: Firmly press the spark plug boot onto the spark plug until it clicks into place.
6. Connect to Coil: Securely attach the other end to the corresponding terminal on the ignition coil.
7. Repeat Process: Continue this process for the remaining cylinders.
8. Final Check: Once all wires are replaced, reconnect the battery terminal. Start the engine to ensure it runs smoothly.

Troubleshooting & FAQ

Q: How do I know if these wires will fit my engine?

A: These 12-inch wires are designed for a wide range of Johnson/Evinrude V4-V6 outboards from the 1980s-1990s, as well as some smaller 10-75 HP models. To ensure a correct fit, please check the part number on your existing wires and compare it to the numbers in our "Part Number Cross-Reference" table, such as 582365 or 18-8818.

Q: What are the signs that my ignition coil wires need replacing?

A: Common symptoms of failing ignition wires include engine misfires (especially under load), rough idling, reduced power, poor fuel economy, and visible damage like cracks, burns, or abrasion on the wire insulation.

Q: What is the difference between these wires and original OEM parts?

A: These are aftermarket wires engineered to meet or exceed OEM specifications. They are constructed with high-quality silicone and stainless steel conductors to provide excellent heat resistance and electrical conductivity for reliable engine performance.

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?

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.