Mercury – Quicksilver 816761Q12 Spark Plug Wire Kit | V8 GM MerCruiser Tow Sports Engines (5.7L) | Points Ignition | 816761Q12

Overview

A clean, strong spark is the difference between an engine that hesitates and one that roars to life. The Quicksilver 816761Q12 Spark Plug Wire Kit keeps your V8 5.7L GM-based MerCruiser Tow Sports engine firing reliably, whether you’re pulling a skier or cruising home at sunset. Designed for conventional points ignition systems (1985–1995), this OEM set restores factory-quality ignition performance and durability.

Each wire is precision-cut to the correct length for neat, stress-free routing. The molded boots seal tight against moisture and heat, while the marine-grade insulation protects against corrosion and cracking — giving your tow-sports boat the reliable ignition it needs for years of service.

Key Features

• Purpose: Replaces aging plug wires to restore steady, reliable ignition performance.
• Fitment: For V8 5.7L GM-based MerCruiser Tow Sports inboard engines (1985–1995) with points ignition systems.
• Kit Contents: Complete set of eight spark plug wires with molded plug-end boots.
• Design: Each wire is cut to the correct factory length for clean installation and proper reach.
• Marine Durability: Engineered for heat, moisture, and vibration resistance specific to marine conditions.

Engine & Boat Compatibility

• V8 5.7L GM-based MerCruiser Tow Sports inboard engines
• Points ignition systems (1985–1995)
• Common in ski boats, wake boats, and inboard tow-sport setups

Performance & Practical Benefits

The 816761Q12 wire kit restores the kind of smooth, confident ignition your boat had when it was new. Each wire delivers consistent voltage to every plug, improving cold starts, idle quality, and throttle response. Low-resistance cores keep spark energy strong, while the rugged insulation ensures long life under the constant heat and vibration of a marine engine bay.

When your tow boat is running long sets or idling between pulls, reliable spark means fewer misfires and cleaner performance. The pre-measured wires make installation quick and foolproof — just replace one wire at a time and you’re good to go.

Why Buy OEM

Mercury’s OEM wires are built specifically for marine use — engineered for moisture protection, temperature extremes, and constant movement. Automotive wire sets can’t match that. Aftermarket options might look similar, but they often use lower-quality materials that wear out faster in salt or heat.

A genuine Quicksilver kit guarantees proper fit, correct resistance, and the durability Mercury engines are known for. It’s the same quality trusted by factory technicians and serious boat owners alike.

FAQ

Q1: Which engines use the Quicksilver 816761Q12 kit?
A: It fits V8 5.7L GM-based MerCruiser Tow Sports inboard engines (1985–1995) with points ignition systems.

Q2: What comes in the kit?
A: A full set of eight spark plug wires, each pre-fitted with molded boots.

Q3: Are these wires safe for saltwater boats?
A: Yes. The marine-rated insulation and connectors resist corrosion in both fresh and saltwater environments.

Q4: Is installation easy?
A: Yes. Each wire is factory-length and ready to install — just match and replace one at a time.

Q5: Why use OEM wires instead of generic ones?
A: OEM wires fit perfectly, last longer, and provide better spark under marine stress.