Mercury – Quicksilver Blue Wire Spark Plug Wire Kit | V8 Inboard Ignition System | Marine Grade | 847701Q17

Overview

The Quicksilver 847701Q17 Blue Wire Spark Plug Wire Kit is built specifically for the V8 MerCruiser 454 Magnum MPI Horizon inboard engines from 1998. Each wire is made to the exact factory length and fitted with heavy-duty boots for a perfect fit. Designed by Mercury Marine, this set delivers a strong, consistent spark and holds up against the heat, moisture, and vibration that come with life on the water.

Key Features

• Purpose: Carries a clean, reliable spark from the ignition system to each plug for smooth performance.
• Material: Marine-grade silicone insulation and corrosion-resistant wiring built to handle harsh conditions.
• Performance: Delivers steady voltage, prevents misfires, and helps your V8 run stronger and cleaner.
• Design: Pre-cut blue wires made to exact OEM specs with snug-fitting boots for easy routing and a clean look.
• Ease of Use/Install: Direct replacement—no cutting, measuring, or guessing needed. Just plug them in and go.

Compatibility

• Engines: MerCruiser 454 Magnum MPI Horizon (1998)
• Type: V8 Inboard Engines
• Common Applications: Sport Cruisers | Offshore Boats | Cabin Cruisers | Classic Inboard Setups

Performance & Real-World Benefits

If your old wires are cracked, worn, or corroded, this kit will make your motor feel new again. With solid spark delivery to every cylinder, you’ll notice quicker starts, smoother idle, and stronger midrange power. The marine-grade insulation keeps electrical energy flowing clean even in damp, salt-heavy air—so you can count on your boat to fire up every time, no matter where you keep it.

Why Choose OEM

Choosing Mercury Marine OEM parts means you’re getting gear built exactly for your engine, not an aftermarket “close enough” fit. Every Quicksilver wire is tested for heat resistance, voltage consistency, and corrosion protection. Aftermarket versions often cut corners on insulation or length, which can cause uneven firing or short life. OEM parts fit right, last longer, and protect your engine’s performance and reliability.

FAQ

Q1: What engine does this kit fit?
It’s made for the V8 MerCruiser 454 Magnum MPI Horizon (1998).

Q2: Are the wires the same length as the factory originals?
Yes, they’re factory-cut to the exact lengths needed and ready to install.

Q3: Will they handle saltwater exposure?
Yes. They’re marine-rated and built to resist corrosion and moisture damage.

Q4: Do they come with the spark plug boots attached?
They do—each wire comes fully assembled with tight-fitting boots for easy setup.

Q5: How many wires are included?
You get a full set of eight blue wires, one for each cylinder.