Mercury – Quicksilver 816761Q14 Spark Plug Wire Kit | 3.0L & LX MerCruiser Engines | Delco EST Ignition | 816761Q14

Overview

A strong, steady spark is what keeps your MerCruiser engine running smooth and dependable. The Quicksilver 816761Q14 Spark Plug Wire Kit is built for 3.0L and LX MerCruiser engines (1990–2016) equipped with Delco EST ignition systems. This OEM wire set restores reliable spark delivery, cleaner ignition, and the long-lasting durability that Mercury owners count on.

Each wire is precision-cut for the correct plug reach and fitted with molded boots that lock snugly in place. The insulation is marine-grade — built to handle the heat, vibration, and moisture that come with life on the water.

Key Features

• Purpose: Replaces aging or corroded spark plug wires to restore proper ignition performance.
• Fitment: For 3.0L and LX MerCruiser engines (1990–2016) with Delco EST ignition systems.
• Kit Contents: Complete set of spark plug wires with molded boots on each plug end.
• Design: Each wire is tailored for exact plug location, ensuring a neat, factory-style fit.
• Durability: Designed for marine endurance — resistant to heat, vibration, and moisture exposure.

Engine & Boat Compatibility

• 3.0L and LX MerCruiser engines (1990–2016)
• Delco EST ignition systems
• Found on popular runabouts, bowriders, and inboard/outboard boats

Performance & Practical Benefits

The 816761Q14 wire kit brings your ignition system back to factory performance. Low-resistance cores deliver consistent spark energy for smooth idle, strong acceleration, and easy starting. When your engine’s firing evenly, you’ll feel sharper throttle response and better fuel efficiency.

The heavy-duty insulation holds up to years of marine use — it won’t crack, dry out, or let moisture in. Each wire’s length matches the engine layout perfectly, so installation is simple and tidy. Just replace one wire at a time, and you’ll be back on the water in no time.

Why Buy OEM

Mercury’s OEM ignition wires are made for the marine world — not repurposed from automotive designs. Every wire is tested for proper resistance, durability, and flexibility to handle the constant motion and heat of your engine compartment.

Aftermarket wire sets can be hit or miss, often using cheaper insulation or incorrect lengths that cause fit issues. With genuine Quicksilver parts, you’re getting the same precision and reliability your engine had when it left the factory.

FAQ

Q1: Which engines fit the Quicksilver 816761Q14 kit?
A: It fits 3.0L and LX MerCruiser engines (1990–2016) with Delco EST ignition systems.

Q2: How many wires come in the kit?
A: The kit includes a complete set of spark plug wires, each pre-fitted with molded boots.

Q3: Can these wires handle saltwater?
A: Yes. They’re made with corrosion-resistant terminals and marine-grade insulation designed for salt and freshwater conditions.

Q4: Are they easy to install?
A: Very. Replace one wire at a time to keep the firing order correct — no special tools required.

Q5: Why choose OEM over generic wires?
A: OEM wires ensure perfect fit, correct resistance, and marine-grade durability — aftermarket versions can’t match that consistency.