Mercury – Quicksilver 816761Q8 Spark Plug Wire Kit | Inline 6-Cylinder MerCruiser Engines | Points Ignition | 816761Q8

Overview

If your old inline-six MerCruiser is starting to sputter or miss, new plug wires might be just what it needs. The Quicksilver 816761Q8 Spark Plug Wire Kit brings back smooth ignition and steady performance for 6-cylinder MerCruiser engines (1963–1981) equipped with conventional points ignition systems.

This OEM set includes all six wires, each molded, measured, and cut to the correct length for your setup. The insulation is marine-grade and built to handle the tough stuff — heat, salt spray, vibration, and long days on the water. It’s a simple upgrade that keeps your vintage engine running clean and reliable.

Key Features

• Purpose: Replaces old or brittle wires to restore proper spark and engine performance.
• Fitment: For inline 6-cylinder MerCruiser engines (1963–1981) using points ignition systems.
• Kit Contents: Six spark plug wires with molded boots for tight, moisture-resistant connections.
• Design: Each wire is factory-length for correct routing and clean installation.
• Durability: Built to resist marine heat, vibration, and corrosion for long-lasting reliability.

Engine & Boat Compatibility

• Inline 6-cylinder MerCruiser engines (1963–1981)
• Points ignition systems
• Common in classic cruisers, fishing boats, and inboard/outboard setups

Performance & Practical Benefits

The 816761Q8 kit gives your ignition a fresh start. Each wire delivers consistent voltage to its spark plug, improving throttle response, fuel efficiency, and idle quality. The marine-rated insulation prevents arcing, even in hot or humid engine compartments.

The snug-fitting boots lock out moisture and salt, keeping your connections clean and protected. Once installed, you’ll notice smoother acceleration, quicker starts, and a more confident pull when you open the throttle — proof that fresh spark makes all the difference.

Why Buy OEM

Mercury’s OEM parts are designed for marine life — not just adapted from automotive parts. Every Quicksilver wire is tested for proper resistance, length, and flexibility to handle marine vibration and heat. Aftermarket wires often cut corners, using thinner insulation or incorrect core materials that lead to misfires and early wear.

A genuine Quicksilver wire kit gives you factory-quality fit and performance — the same spark your engine had when it rolled out new. It’s a small investment that keeps a classic motor running strong.

FAQ

Q1: What engines use the Quicksilver 816761Q8 kit?
A: It fits inline 6-cylinder MerCruiser engines (1963–1981) with points ignition systems.

Q2: How many wires are included?
A: The kit includes six spark plug wires, each cut to the correct factory length.

Q3: Can these be used in saltwater?
A: Yes. The wires are built from corrosion-resistant materials made for both salt and freshwater use.

Q4: Is it easy to install?
A: Yes. Replace one wire at a time to maintain firing order — it’s a straightforward DIY job.

Q5: Why OEM instead of aftermarket?
A: OEM wires guarantee perfect fit, correct resistance, and marine-ready materials that last far longer than generic sets.