Mercury – Ignition Coil | MerCruiser MPI Series | Marine-Grade Composite | 8M0054588

Overview

There’s a certain comfort that comes from turning the key and hearing your MerCruiser fire instantly—no hesitation, no uneven stumble, just smooth, confident ignition. Out on the water, that moment matters. It means you can focus on the run ahead instead of worrying about what’s happening under the engine hatch. The Quicksilver 8M0054588 Ignition Coil is one of those quiet, crucial parts that keeps your days on the water steady and predictable. When this coil is doing its job, you simply feel that everything is right with your boat.

Key Features

• Designed to deliver reliable spark energy for MerCruiser Multi-Port Injection engines
• Marine-grade composite materials built for heat, vibration, and long-term use
• Engineered for precise performance in MerCruiser 4.3L, 5.0L, and 6.2L MPI engines equipped with ECM 555
• Built to Mercury Marine original equipment manufacturer specifications for consistent output
• Stable, durable construction for strong performance in high-demand marine environments

Engine & Boat Compatibility

• Fits MerCruiser sterndrive and inboard engines with MPI fuel systems
• Compatible with 4.3L, 5.0L, and 6.2L engines using ECM 555 (2001 and newer)
• Works within serial range 0M300000–2A455878
• Ideal for runabouts, towboats, cruisers, and other family or sport-oriented boats powered by MerCruiser MPI packages

Performance & Practical Benefits

A dependable ignition coil isn’t something you see, but you absolutely feel it every time your boat pulls away smoothly from the dock. This Mercury Marine part keeps spark delivery tight and consistent, helping your engine idle cleanly, accelerate smoothly, and stay steady in rougher water. Its design handles the heat and vibration that often wear out lesser coils, giving you the confidence that your engine will respond the moment you ask it to.

Install it once and you’ll notice how much calmer your starts feel—no sputter, no lag, just a secure, predictable ignition every time. And because it’s made to Mercury’s exacting standards, the fit is spot-on, making installation straightforward whether you’re doing the work yourself or having your local shop handle it.

Why Buy OEM

Going with a genuine Mercury Marine part isn’t about logos—it’s about trust and long-term reliability. This ignition coil is built specifically for MerCruiser MPI engines, not adapted from a generic design. That means fewer headaches, better compatibility, and a performance level that holds up season after season. While aftermarket coils may look similar, they rarely match the precision, durability, and engineering behind a true OEM part. If you want a part that fits right the first time and keeps your engine running strong, this is the smart, practical choice.

FAQ

Q1: Which Mercury engines does the Ignition Coil 8M0054588 fit?

It fits MerCruiser 4.3L, 5.0L, and 6.2L MPI engines equipped with ECM 555 from model year 2001 and newer.

Q2: What makes this better than aftermarket ignition coils?

You’ll get the exact engineering, spark strength, and long-term durability your MerCruiser was designed for—no guessing, no compromises.

Q3: How can I confirm it’s the right part for my engine?

Check your engine’s serial number and verify ECM 555. When in doubt, consult your service manual or mechanic.

Q4: Can this part be used in saltwater and freshwater?

Absolutely. It’s built to handle both environments with strong corrosion resistance.

Q5: Is installation straightforward?

Yes, most boat owners familiar with basic maintenance can replace it easily thanks to the precise OEM fit.