Mercury – Quicksilver 816761Q7 Spark Plug Wire Kit | V6 MerCruiser Engines (229 CID) | Points Ignition | 816761Q7

Overview

If your old MerCruiser V6 is starting rough or missing under load, weak plug wires might be the culprit. The Quicksilver 816761Q7 Spark Plug Wire Kit gives your 229 CID MerCruiser engine (1983–1984) the spark energy it needs for smoother running and stronger performance. Designed for conventional points ignition systems, this OEM wire set restores clean ignition and reliability in classic marine engines.

Each wire is cut to the right length and fitted with molded boots that seal tightly to block out water and salt. Built from tough, marine-rated materials, these wires are made to handle years of vibration, heat, and moisture without losing conductivity.

Key Features

• Purpose: Replaces worn or cracked wires to restore strong, even spark.
• Fitment: For V6 MerCruiser 229 CID engines (1983–1984) with points ignition systems.
• Kit Contents: Six spark plug wires with molded plug-end boots for moisture-tight connections.
• Design: Factory-length leads ensure the correct routing and clean installation.
• Durability: Built to resist marine heat, vibration, and corrosion for dependable service life.

Engine & Boat Compatibility

• 229 CID (3.8L) V6 MerCruiser engines, model years 1983–1984
• Conventional points ignition systems
• Common on older cruisers, ski boats, and vintage stern-drive setups

Performance & Practical Benefits

A fresh set of plug wires can make a world of difference in how your boat runs. The 816761Q7 kit delivers solid spark voltage to every cylinder, improving throttle response, fuel economy, and startup reliability. Low-resistance wire cores maintain clean energy flow, while the thick insulation prevents arcing or interference even in high-heat conditions.

Each molded boot locks securely to the plug, keeping out water and salt that can corrode terminals. Once installed, you’ll notice smoother idle, easier starts, and stronger pull under throttle — proof that small parts can have a big impact.

Why Buy OEM

Mercury’s OEM wire sets are designed specifically for marine use — engineered to handle constant vibration, salt exposure, and heat cycles. Aftermarket wires might fit, but they often lack the insulation quality or precise resistance that older engines need to perform at their best.

A genuine Quicksilver kit ensures the correct fit, dependable spark delivery, and long life. It’s the same standard Mercury used when your engine was new, built for years of reliable performance on the water.

FAQ

Q1: What engines fit the Quicksilver 816761Q7 kit?
A: It fits V6 MerCruiser 229 CID (3.8L) engines with points ignition systems (1983–1984).

Q2: What’s included?
A: A complete set of six spark plug wires, each with molded plug boots for secure connections.

Q3: Can I use these in saltwater?
A: Yes. They’re made from marine-grade materials that resist corrosion in both fresh and saltwater.

Q4: Is installation simple?
A: Yes. Replace the wires one by one to keep firing order correct — no special tools required.

Q5: Why choose OEM over aftermarket?
A: OEM wires provide exact fit and performance tested for marine conditions, while aftermarket options often wear out faster or fit poorly.