Mercury – NGK BPF5F Spark Plug (Pack of 10) | Ignition System | Trivalent Metal Finish | 8M0204728

Overview

There’s something reassuring about an engine that fires up instantly — no hesitation, no stumble, just that clean, confident spark that tells you the day’s off to a good start. Every boater knows that feeling, and the right spark plug plays a bigger role in it than most people think. This Mercury Marine part delivers that kind of trust. Whether you’re heading out before sunrise or cruising back in at dusk, having a solid ignition system gives you peace of mind every time you turn the key.

Key Features

• NGK BPF5F spark plugs designed for reliable ignition performance
• Pre-gapped to manufacturer specifications for proper installation
• Trivalent metal plating for superior marine corrosion resistance
• Copper core construction for efficient heat dissipation
• Solid terminal design ensures clean, positive contact with plug wires
• Mercury Marine part number 8M0204728 (pack of ten plugs)

Engine & Boat Compatibility

• Fits select Mercury and Mariner outboard engines requiring NGK BPF5F plugs
• Ideal for various horsepower ranges depending on model specification
• Appropriate for both two-cycle and four-cycle engines using this plug type
• Common on fishing boats, center consoles, small cruisers, and sporty runabouts
• Designed for vessels that demand smooth starts and crisp throttle response

Performance & Practical Benefits

A high-quality spark plug affects everything from start-up reliability to how smoothly your engine idles throughout the day. These NGK plugs create a tight, consistent spark that helps the engine light cleanly, burn fuel efficiently, and maintain steady power even under load. The copper core pulls heat away quickly, helping reduce fouling and improving overall performance in slow trolling, long idling sessions, and repeated stop-and-go use.

In real use, you’ll notice a smoother throttle feel, quicker ignition, and a more stable idle. The trivalent plating resists corrosion even in harsh saltwater environments, while the ribbed insulator helps prevent flashover and misfires. Installation is simple — the plugs seat cleanly, thread smoothly, and tighten with a solid, secure feel. Replacing all ten at once restores uniformity across your ignition system, helping the engine run evenly from cylinder to cylinder.

Why Buy OEM

When it comes to spark plugs, precision matters. Using a genuine Mercury Marine part ensures the gap, heat range, and materials match your engine exactly as it was designed. Aftermarket alternatives might appear similar, but small variations can lead to misfires, reduced fuel economy, or long-term damage. Genuine NGK plugs supplied through Mercury meet the specific standards required for marine engines — engines that face constant moisture, vibration, and fluctuating temperatures.

Buying OEM means fewer surprises and more reliability. It’s the practical choice seasoned boaters make because they’ve learned that a clean, dependable ignition system is the foundation of a good day on the water.

FAQ

Q1: Which Mercury engines use the NGK BPF5F Spark Plug 8M0204728?

It fits select Mercury and Mariner outboards that specify NGK BPF5F plugs. Always confirm with your owner’s manual.

Q2: What makes these plugs different from aftermarket versions?

They meet Mercury’s exact specifications, feature marine-grade corrosion resistance, and use NGK’s proven copper core design for superior performance.

Q3: How do I know if this is the right plug for my setup?

Check your owner’s manual. If it lists NGK BPF5F or part number 8M0204728, this is the correct replacement.

Q4: Can these spark plugs be used in both saltwater and freshwater environments?

Yes — the trivalent plating and ceramic insulator are designed to handle marine conditions of all kinds.

Q5: Is installation straightforward for most boat owners?

Definitely. With a standard spark plug socket and a little care, these plugs install smoothly and securely.