Mercury – NGK BPF7C Spark Plug (Pack of 10) | Ignition System | Trivalent Metal Finish | 8M0204737

Overview

There’s a special kind of confidence that comes when your engine lights up on the very first turn of the key. No sputter, no hesitation — just that clean spark that tells you the day is starting off right. Boaters know this feeling well, and the right spark plug plays a huge part in it. This Mercury Marine part delivers that peace of mind. Whether you’re heading out before sunrise or easing back toward home after a long day, you’ll appreciate the reliability that comes from plugs designed to fire strong and burn clean.

Key Features

• NGK BPF7C spark plugs designed for stable ignition and consistent performance
• Pre-gapped to match engine manufacturer specifications
• Trivalent metal plating for corrosion resistance in marine environments
• Copper core construction promotes heat dissipation and dependable spark quality
• Solid terminal ensures positive, secure contact with spark plug wires
• Mercury Marine part number 8M0204737 (pack of ten plugs)

Engine & Boat Compatibility

• Fits select Mercury and Mariner outboard engines specifying NGK BPF7C plugs
• Suitable for certain two-cycle and four-cycle models that require this heat range
• Ideal for fishing boats, aluminum runabouts, sport pontoons, and compact cruisers
• Designed for boats that demand quick starts, smooth idle, and crisp throttle response

Performance & Practical Benefits

A good spark plug doesn’t just help the engine start — it affects the entire personality of the motor throughout the day. With these NGK plugs, you’ll notice a smooth, steady idle and a clean, confident spark each time you accelerate. The copper core allows heat to move away from the tip quickly, helping prevent fouling during long idle sessions or slow trolling. That translates into fewer hiccups, better fuel burn, and a more responsive feel at the helm.

The trivalent plating is especially important for boaters who run in saltwater or humid climates. It resists corrosion and seizing, making plug removal easier even after a long season. The ribbed ceramic insulator helps prevent flashover, which keeps misfires and power loss in check. When you install the full set of ten, the engine runs evenly across all cylinders — you’ll feel the difference in how smooth, balanced, and “in sync” the motor becomes.

Why Buy OEM

Marine engines live tougher lives than most powerplants. They face constant moisture, temperature swings, and vibration. That’s why choosing a genuine Mercury Marine part is so important. NGK plugs supplied through Mercury are matched to the exact specifications your engine was designed around — heat range, gap, materials, and construction.

Aftermarket spark plugs may look the same, but internal differences can lead to misfires, reduced power, or long-term engine damage. With OEM, you get reliable ignition, better fuel economy, and a plug that simply performs the way it should. It’s the sort of practical advice you hear from seasoned boaters at the dock: when it comes to ignition, don’t cut corners.

FAQ

Q1: Which Mercury engines use the NGK BPF7C Spark Plug 8M0204737?

It fits specific Mercury and Mariner outboards requiring NGK BPF7C plugs. Always confirm with your owner’s manual.

Q2: What sets these plugs apart from aftermarket versions?

They’re built to Mercury’s ignition standards, use marine-grade trivalent plating, and feature NGK’s proven copper-core construction.

Q3: How do I confirm this is the right plug for my engine?

Check your manual or existing plug. If it calls for NGK BPF7C or part number 8M0204737, this is the correct replacement.

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

Yes — the plating and ceramic insulator are designed to handle both.

Q5: Is installation straightforward?

Absolutely. With a basic spark plug socket, the plugs thread cleanly and tighten with a secure, confident feel.

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