9" Spark Plug Wire – Fits Mercury/Mariner Outboard 150-200 HP (Replaces 84-813715A1)

9" Spark Plug Wire – Fits Mercury/Mariner Outboard 150-200 HP (Replaces 84-813715A1)

This 9" spark plug wire is designed for Mercury and Mariner V6 outboard engines with 150-200 HP, covering 2-Stroke models made between 1970 and 1988. It ensures a reliable connection between the ignition coil/distributor and the spark plug for consistent engine performance.

Direct Replacements: Sierra 18-5227-1, Mercury 84-813715A1, HEPENG 18-5227-1

• Includes 1 x 9" Spark Plug Wire
• Fits Mercury/Mariner outboard engines 150-200 HP (2-Stroke)
• Installation as direct replacement

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

• 1 x 9" Spark Plug Wire (84-813715A1)

Installation Guide

1. Ensure the engine is off and cool before starting installation.
2. Remove the old spark plug wire by pulling the boot, not the wire, to avoid damage.
3. Compare the new wire length to the old wire to confirm correct size.
4. Attach the terminal end of the new wire to the ignition coil or distributor firmly.
5. Connect the boot end securely onto the spark plug until it clicks or seats tightly.
6. Route the wire avoiding sharp edges or hot engine parts to prevent wear.
7. Double-check all connections for a firm fit with no loose ends.
8. Start the engine and observe for smooth operation without misfires.
9. If there are performance issues, recheck connections or consult a marine mechanic.

Troubleshooting & FAQ

How do I confirm this fits my engine?

Check the compatible engine models list and serial ranges provided to ensure your engine matches one of the supported Mercury V6 150-200 HP 2-Stroke models.

How often should I replace this spark plug wire?

Replacement intervals vary by usage and conditions, but inspect wires regularly and replace if damaged, cracked, or causing misfires.

What are the differences compared to OEM parts?

This listing is an aftermarket replacement part (not an OEM component). It is built to OEM specifications using comparable-grade materials in an ISO9002-certified facility.

What are common signs of spark plug wire failure?

Engine misfires, rough idling, difficulty starting, or visible wire damage are common indicators.

OEM vs. Aftermarket?

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.

How fast do you ship and how much does it cost?

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.

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.