Mercury – Spark Plug | NGK BR7HS-10 Series | Marine-Grade Metal & Ceramic | 8M0181925

Overview

There’s a certain confidence that comes from hitting the ignition and hearing your engine fire instantly, cleanly, and without hesitation. It’s that little moment—whether you’re drifting near the mangroves or gearing up for a long run offshore—that reminds you your boat is ready. The Quicksilver 8M0181925 NGK BR7HS-10 Spark Plug helps deliver that feeling every time. Built for dependable starts and steady performance, it’s the kind of small but essential Mercury Marine part that keeps your motor feeling strong, responsive, and trustworthy.

Key Features

• NGK BR7HS-10 spark plug engineered for marine performance
• Pre-gapped to 1 mm to meet engine manufacturer specifications
• Durable alumina-silicate ceramic insulator for improved heat transfer
• Ribbed suppressor seal reduces misfires and prevents spark flash-over
• Triple-seal construction for long-lasting reliability
• Pack of 10 plugs for full engine servicing

Engine & Boat Compatibility.

• Designed for Mercury and Mariner engines requiring NGK BR7HS-10 plugs.
• Suitable for select 2-stroke outboard applications
• Ideal for small to mid-horsepower fishing boats, runabouts, and utility craft
• Compatible with engines using standard-heat-range NGK plugs
• Always confirm fitment using your engine owner’s manual

Performance & Practical Benefits.

A fresh set of spark plugs can transform how your engine feels on the water. With this Mercury Marine part, you’ll notice smoother starts, more consistent throttle response, and a cleaner idle—especially after replacing all plugs at the same time. The pre-gapped design removes guesswork, while the robust ceramic insulator keeps heat under control during long hours of operation.

Each plug is built to withstand tough marine conditions, from heavy humidity to wide temperature swings. The trivalent metal plating resists corrosion and prevents seizing, making removal at your next service simple and frustration-free. On the water, it translates to steady power, fewer hiccups, and the secure feeling that your engine is breathing exactly the way it should.

Why Buy OEM

With something as critical as spark plugs, precision matters. Aftermarket versions often look fine on the outside, yet small differences in heat range or electrode quality can lead to hard starts, wasted fuel, or long-term engine wear. Using this Mercury Marine part ensures you’re installing exactly what the manufacturer specifies—nothing more, nothing less.

The NGK BR7HS-10 plug in this kit is engineered to work in harmony with Mercury’s ignition timing, fuel delivery, and combustion design. It’s cost-effective, dependable, and built to make your maintenance simple. Boaters who’ve learned from experience will tell you: stick with OEM-trusted plugs and your engine will thank you with years of clean, confident performance.

FAQ

Q1: Which engines does the 8M0181925 NGK BR7HS-10 Spark Plug fit?

It fits Mercury and Mariner engines that specifically call for the NGK BR7HS-10 plug in the owner’s manual.

Q2: What makes this spark plug better than aftermarket alternatives?

It’s built to Mercury Marine specifications, ensuring the correct heat range, gap, and materials for optimal combustion.

Q3: How can I confirm it’s the correct replacement?

Check your engine owner’s manual or the emissions label on your engine cowling.

Q4: Can it be used in saltwater and freshwater applications?

Yes—its anti-corrosion plating is designed for harsh marine environments.

Q5: Is installation straightforward?

Most boaters can install them with a standard spark plug socket; just verify the gap before installation.