NGK BR6FS Spark PlugThe NGK BR6FS Spark Plug is a standard NGK plug. NGK Standard plugs are an OE cornerstone that have provided decades of reliable performance. The solid copper core offers superior heat dissipation, conductivity, and broad heat range. This plug is treated with corrosion-resistant plating to ensure ease of installation and removal.NGK Standard spark plugs provide reliable performance and are engineered specifically for OE applications.Part Number:BR6FSStock Number: 4323Resistance (Ohm): 5000Ground configuration: StandardGround electrode core material: NickelCenter electrode core material: CopperCenter electrode tip material: NickelFits Indmar – to 1997, Kodiak – 1999-2000, Marine Power – 1975-2000, 2000-2006 Mercruiser, 1982-1993 OMCCheck 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.Replaces:Quicksilver / Mercury33-59571BYamaha BR6-FS000-00-00Evinrude / Johnson 0509573, 0503708Frequently Asked QuestionsWhat is the NGK BR6FS Spark Plug used for?The NGK BR6FS is a standard spark plug engineered for OE applications. It features a solid copper core for heat dissipation and conductivity, along with corrosion-resistant plating for easier installation and removal. The plug has a standard ground configuration with nickel ground and center electrode tip materials.Which marine engines does the NGK BR6FS Spark Plug fit?The NGK BR6FS is listed for Indmar through 1997, Kodiak from 19992000, Marine Power from 19752000, MerCruiser from 20002006, and OMC from 19821993. Verify your engine model and year before installation to confirm that this spark plug is the correct application.What are the specifications of the NGK BR6FS Spark Plug?The NGK BR6FS has part number BR6FS and stock number 4323. It has a 5000-ohm resistance, standard ground configuration, nickel ground electrode core material, copper center electrode core material, and nickel center electrode tip material.What type of electrode materials does the NGK BR6FS Spark Plug use?The NGK BR6FS uses nickel for the ground electrode core and center electrode tip, while the center electrode core is made of copper. Its solid copper core is designed to provide heat dissipation, conductivity, and a broad heat range.What spark plug part numbers does the NGK BR6FS replace?The NGK BR6FS is listed as a replacement for Quicksilver/Mercury 33-59571B, Yamaha BR6-FS000-00-00, Evinrude/Johnson 0509573, and Evinrude/Johnson 0503708. Compare the existing spark plug number with the listed replacements and verify your engine manufacturer’s recommendation before use.How do I verify whether the NGK BR6FS is the correct spark plug for my engine?Check your engine and maintenance manual for the correct spark plug specification and use only the plug recommended by your engine’s original equipment manufacturer. The supplied product description warns that using the wrong spark plug can reduce optimum performance, reduce fuel economy, or cause engine damage.//