NGK Spark Plugs NGK: Standard Nickel Plug 6431

NGK BU8H Spark Plug

NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation and removal. The solid copper core offers superior heat dissipation, conductivity and broad heat range.  NGK Standard plugs are an OE cornerstone that has provided decades of reliable performance.

Part Number: BU8H

Stock Number: 6431

Resistance (Ohm): 1

Ground configuration: Standard

Ground electrode core material: Nickel

Center electrode core material: Copper

Center electrode tip material: Nickel

Fits O/B - 1999-1978 MARINER, 2002-1978 MERCURY

Check your engine and maintenance manual for the correct spark plug and only use as recommended by your engine's original equipment manufacturer. Using the wrong plug can reducing optimum performance, reduce fuel economy or cause damage to your engine.

Frequently Asked Questions

• What is the NGK BU8H Spark Plug used for? The NGK BU8H Spark Plug is an NGK Standard spark plug designed for specified Mariner and Mercury outboard applications. It uses a solid copper core for heat dissipation and conductivity, along with corrosion-resistant plating designed to support reliable performance and ease of installation and removal.
• What Mariner and Mercury outboards does the NGK BU8H Spark Plug fit? The NGK BU8H fits Mariner outboards from 1978 through 1999 and Mercury outboards from 1978 through 2002, according to the supplied application information. Verify your specific engine and model year with the engine or maintenance manual before installation.
• What are the specifications of the NGK BU8H Spark Plug? The NGK BU8H has part number BU8H and stock number 6431. It has 1 Ohm resistance and a standard ground configuration. The ground electrode core is nickel, while the center electrode uses a copper core with a nickel tip.
• What are the benefits of the copper core in the NGK BU8H Spark Plug? The solid copper core in the NGK BU8H Spark Plug provides heat dissipation and conductivity across a broad heat range. The center electrode uses a copper core with a nickel tip, supporting the reliable performance associated with NGK Standard spark plugs.
• Does the NGK BU8H Spark Plug have corrosion-resistant plating? Yes. The NGK BU8H Spark Plug is treated with corrosion-resistant plating. According to the product description, this treatment is intended to provide ease of installation and removal while supporting the plug's reliable performance.
• How do I verify that the NGK BU8H is the correct spark plug for my outboard? Check your engine and maintenance manual to confirm the correct spark plug recommended by the engine's original equipment manufacturer. Using the wrong spark plug can reduce optimum performance or fuel economy and may cause engine damage, so verify the application before installation.