{"product_id":"ngk-marine-spark-plug-br6fs-4323-4-pack-zinc-dipped-copper-core-for-watersport-engines","title":"NGK Marine Spark Plug BR6FS (4323) 4-Pack — Zinc-Dipped, Copper-Core for Watersport Engines","description":"\u003cp\u003e\u003cstrong\u003eNGK BR6FS (4323) is a boxed 4-pack marine spark plug engineered to deliver reliable ignition and corrosion resistance for small watersport engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt by NGK and sold as the BR6FS, part number 4323, this set of four spark plugs combines a solid copper core and corrosion-resistant plating to maintain consistent sparks in damp, high-vibration marine environments. The design reduces fouling and flashover while sealing combustion gases, making these a direct-fit replacement for many outboard and personal watercraft ignition systems.\u003c\/p\u003e\n\n\u003ch3\u003eHow will these plugs improve starting and throttle response on my watersport engine?\u003c\/h3\u003e\n\u003cp\u003eThese plugs offer stable spark delivery from the copper core, which supports strong ignition across a wide RPM range. Cleaner combustion from the longer insulator nose helps prevent misfires, improving responsiveness during quick throttle changes.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid copper core for steady heat transfer and reliable sparks.\u003c\/li\u003e\n  \u003cli\u003eLong insulator nose reduces deposits that cause fouling.\u003c\/li\u003e\n  \u003cli\u003eResistor value of 5K Ohm to minimize electrical interference.\u003c\/li\u003e\n  \u003cli\u003eFactory-specified .031\" (0.8mm) gap tuned for typical marine ignition systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these plugs durable in saltwater and humid conditions?\u003c\/h3\u003e\n\u003cp\u003eYes—NGK applies a zinc-dipped shell to each plug to slow down corrosion from salt and moisture. A triple-gasket sealing system prevents combustion gases from leaking, which helps preserve the plug's mechanical integrity and performance over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eZinc-dipped outer shell for enhanced corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eTriple gasket seal to eliminate gas leakage and protect threads.\u003c\/li\u003e\n  \u003cli\u003eCorrugated insulator ribs to reduce flashover under wet conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the physical and thread specifications I need to know before buying?\u003c\/h3\u003e\n\u003cp\u003eThe BR6FS follows NGK’s standard dimensions for many small marine engines, so it usually fits without modification. Make sure your engine requires a 14mm thread with 1.25mm pitch and an 11.6mm reach before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread size: 14mm with 1.25mm pitch and tapered seat.\u003c\/li\u003e\n  \u003cli\u003eReach: 11.6mm (0.460\"), hex: 5\/8\" (16mm), overall height: ISO.\u003c\/li\u003e\n  \u003cli\u003eTerminal type: solid; resistor: 5K Ohm; gap: .031\" (0.8mm).\u003c\/li\u003e\n  \u003cli\u003eMaterial\/Type: nickel standard electrode, non-projected projection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these plugs differ from iridium or platinum options?\u003c\/h3\u003e\n\u003cp\u003eBR6FS plugs use a conventional nickel electrode with a copper core, prioritizing dependable performance and lower cost. They are designed for engines where OEM specification calls for standard-material plugs rather than fine-wire precious-metal types.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCopper core improves conductivity compared with solid nickel-only designs.\u003c\/li\u003e\n  \u003cli\u003eNickel electrode offers economy and straightforward replacement intervals.\u003c\/li\u003e\n  \u003cli\u003eNot a fine-wire iridium\/platinum tip—match to engine OEM recommendations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: NGK BR6FS (4323) 4-pack is aimed at boat owners, personal watercraft riders, and marine mechanics who need OEM-fit spark plugs that balance cost and reliable ignition. If your engine specifies a 14mm, 11.6mm reach plug with a tapered seat and .031\" gap, this boxed set is a direct replacement offering corrosion protection and fouling resistance suited to recreational and light commercial watersport use.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use these BR6FS plugs in saltwater boats?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. They have a zinc-dipped shell and triple-gasket seal to resist corrosion and keep combustion sealed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What gap and reach do these plugs have?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Each plug ships with a .031\" (0.8mm) gap and an 11.6mm (0.460\") reach; verify compatibility with your engine manual.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48084326908062,"sku":"B00WF9NFV0","price":31.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-br6fs-front-boxed-packaging.jpg?v=1785850090","url":"https:\/\/northtrailauto.ca\/products\/ngk-marine-spark-plug-br6fs-4323-4-pack-zinc-dipped-copper-core-for-watersport-engines","provider":"North Trail Auto","version":"1.0","type":"link"}