NGK BPR6HS-10 Standard Spark Plug - Fits Mercury/Mariner Outboards 1990-2006, Nissan/Tohatsu Outboards 1997-2007

The NGK BPR6HS-10 is a standard nickel spark plug built on NGK's proven copper-core design, engineered to deliver reliable ignition performance across a wide range of outboard, motorcycle, generator, and small-engine applications. Its solid copper core provides superior heat dissipation and conductivity along with a broad heat range, letting it handle varying engine loads without fouling or overheating. The plug's nickel-plated shell resists corrosion, easing installation and future removal, while cold-rolled threads help prevent cross-threading during service. A nickel ground electrode and nickel center electrode tip are paired with the copper core center electrode for durable, consistent sparking, and a 5000 Ohm resistor helps suppress electrical interference. NGK Standard plugs like the BPR6HS-10 have been an OE cornerstone for decades, making this a dependable choice for routine maintenance or replacement. On the water, it fits Mercury outboards from 1990 to 2006, Mariner outboards from 1990 to 2002, and Nissan and Tohatsu outboards from 1997 to 2007. It also fits 1979-1985 Harley-Davidson and 1987-2001 Yamaha motorcycles, Kubota PE engines, Honda generators, and Pro-Chopper equipment. Always confirm the correct plug against your engine's maintenance manual before installation, since using the wrong plug can reduce performance and fuel economy or damage the engine.

Specifications

• Brand: NGK
• Manufacturer Part Number: BPR6HS-10
• Stock Number: 2633
• Resistance: 5000 Ohm
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Insulator Material: Ceramic
• Thread Size: M14x1.25
• UPC: 087295126332
• Weight: 0.15 pounds
• Quantity: 1 per package

Fitment

• Motorcycle: 1979-1985 Harley-Davidson
• Motorcycle: 1987-2001 Yamaha
• Outboard: 1990-2002 Mariner
• Outboard: 1990-2006 Mercury
• Outboard: 1997-2007 Nissan
• Outboard: 1997-2007 Tohatsu
• PE Engines: Kubota
• Generator: Honda
• Misc Equipment: Pro-Chopper

Replaces (OEM)

• 2633

Frequently Asked Questions

What outboard engines does the NGK BPR6HS-10 fit? The BPR6HS-10 fits Mercury outboards from 1990 to 2006, Mariner outboards from 1990 to 2002, and Nissan and Tohatsu outboards from 1997 to 2007.

Does this spark plug fit any non-marine engines? Yes, the BPR6HS-10 also fits 1979-1985 Harley-Davidson and 1987-2001 Yamaha motorcycles, Kubota PE engines, Honda generators, and Pro-Chopper equipment.

Is the BPR6HS-10 the same as NGK stock number 2633? Yes, BPR6HS-10 is the part number and 2633 is NGK's corresponding stock number for the same spark plug.

What is the thread size on this spark plug? The NGK BPR6HS-10 has an M14x1.25 thread size.

What materials are used in the BPR6HS-10 spark plug? It uses a copper core center electrode with a nickel tip, a nickel ground electrode, and a ceramic insulator, all housed in a corrosion-resistant nickel-plated shell.

How many plugs come in a package? The NGK BPR6HS-10 ships as 1 spark plug per package.

Does this plug have a resistor to reduce electrical interference? Yes, the BPR6HS-10 has a 5000 Ohm resistor built in to help suppress ignition interference.

How does the copper core help engine performance? The solid copper core in the BPR6HS-10 improves heat dissipation and conductivity, supporting reliable starts and a broad operating heat range.

Is the ground electrode configuration standard or projected? The NGK BPR6HS-10 uses a standard ground electrode configuration.

Will the cold-rolled threads on this plug damage my cylinder head? No, the BPR6HS-10 is manufactured with cold-rolled threads specifically designed to prevent cross-threading and cylinder head damage during installation.

How do I know if the BPR6HS-10 is the right plug for my engine? Check your engine and maintenance manual for the correct spark plug specification before installing the BPR6HS-10, since using the wrong plug can reduce performance, hurt fuel economy, or cause engine damage.

Does the BPR6HS-10 need anti-seize compound during installation? No, the trivalent plating on the NGK BPR6HS-10 eliminates the need for anti-seize compound.