Spark Plug Wire Set – Fits Volvo Penta & MerCruiser V8 5.0L/5.7L (Replaces 3888328, 3859000)

Spark Plug Wire Set – Fits Volvo Penta & MerCruiser V8 5.0L/5.7L (Replaces 3888328, 3859000)

This aftermarket spark plug wire set is engineered for a wide range of Volvo Penta and MerCruiser 5.0L and 5.7L V8 engines equipped with electronic ignition. It is designed to perform as a reliable replacement for multiple OEM series, including Volvo Penta GXi, OSi, and GL, as well as MerCruiser sterndrive motors.

This component provides a direct fit, ensuring a straightforward installation process for compatible engine models. It is built to meet or exceed original equipment specifications for consistent performance.

• Direct Fit: Engineered for OEM-equivalent installation.
• Engine Compatibility: For V8 gasoline (petrol) engines with electronic ignition.
• Package Includes: One complete spark plug wire set.

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.

Volvo Penta Models

MerCruiser Models

Technical Specifications

Package Contents

• 1 x Spark Plug Wire Set (3888328)

Installation Guide

1. Ensure the engine is off and completely cool. Disconnect the negative terminal of the battery for safety.
2. Observe and note the routing of the current spark plug wires. Taking a quick photo can serve as a helpful reference.
3. To prevent mixing up the firing order, replace one wire at a time.
4. Begin by firmly grasping the boot of the first wire at the spark plug, then gently twist and pull to disconnect it.
5. Follow that same wire to the distributor cap and disconnect it in the same manner.
6. Match the old wire with a new wire of the same length from your replacement set.
7. Apply a small amount of dielectric grease to the inside of both ends of the new wire's boots. This prevents arcing and eases future removal.
8. Securely attach the new wire, connecting it first to the distributor cap and then to the spark plug. A distinct "click" should be felt or heard.
9. Proceed to replace the remaining wires, one by one, following the same procedure.
10. Once all wires are replaced, double-check that they are securely fastened and routed away from hot engine parts or moving components.
11. Reconnect the battery terminal, start the engine, and check for smooth operation.

Troubleshooting & FAQ

How do I confirm this wire set fits my V8 engine?

This set is designed for specific Volvo Penta and MerCruiser 5.0L & 5.7L V8 engines using electronic ignition. To ensure compatibility, please review the "Compatible Engine Models" table and cross-reference your existing part number with those in the "Part Number Cross-Reference" list.

What are common signs that my spark plug wires need replacement?

Key symptoms include rough idling, noticeable engine misfires, poor or hesitant acceleration, a decrease in fuel economy, or visible signs of wear such as cracks, burns, or abrasion on the wire jackets.

Does this set include the ignition coil wire?

The package contains a complete set of spark plug wires for all cylinders. Please refer to the product images and the "Package Contents" list to verify it includes all components you require for your specific setup.

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.