NGK BR9HS-10 Spark PlugNGK 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: BR9HS-10Stock Number: 4551Resistance (Ohm): 5000Ground configuration: StandardGround electrode core material: NickelCenter electrode core material: CopperCenter electrode tip material: NickelFitsO/B – 2004-1987 YAMAHACheck 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 QuestionsWhat is the NGK BR9HS-10 Spark Plug?The NGK BR9HS-10 Spark Plug is an NGK Standard spark plug designed to provide reliable performance. It features a solid copper core for heat dissipation, conductivity, and a broad heat range, while corrosion-resistant plating helps support easier installation and removal.What outboard engines is the NGK BR9HS-10 Spark Plug compatible with?The NGK BR9HS-10 Spark Plug is listed for Yamaha outboard applications from 1987 through 2004. Check your engine and maintenance manual to confirm that this spark plug is the correct replacement for your specific Yamaha outboard.What are the electrode materials in the NGK BR9HS-10 Spark Plug?The NGK BR9HS-10 has a nickel ground electrode core, a copper center electrode core, and a nickel center electrode tip. Its solid copper core is designed to provide heat dissipation and conductivity while supporting a broad heat range.What is the stock number and resistance of the NGK BR9HS-10 Spark Plug?The NGK BR9HS-10 Spark Plug has a stock number of 4551 and a resistance rating of 5000 Ohms. It also uses a standard ground configuration and is identified by part number BR9HS-10.How do I verify that the NGK BR9HS-10 Spark Plug is correct for my engine?Check your engine and maintenance manual for the correct spark plug and use only the plug recommended by your engine’s original equipment manufacturer. Using the wrong spark plug can reduce optimum performance, reduce fuel economy, or cause damage to your engine.//