{"product_id":"ngk-4551-standard-spark-plug-br9hs-10-for-1987-2004-yamaha-outboards","title":"NGK 4551 Standard Spark Plug BR9HS-10 for 1987-2004 Yamaha Outboards","description":"\u003cp\u003eThe NGK 4551 is a standard spark plug built on NGK's proven nickel-alloy design, engineered to deliver reliable ignition performance in Yamaha outboard engines. Carrying NGK's BR9HS-10 plug specification, it is designed for boaters who want dependable, OE-caliber starting and running performance without paying for a premium precious-metal upgrade.\u003c\/p\u003e\u003cp\u003eThe plug uses a solid copper core for superior heat dissipation and conductivity across a broad heat range, paired with a nickel ground electrode and nickel-tipped center electrode. A high-grade alumina silicate ceramic insulator provides strength and efficient heat transfer, while cold-rolled threads reduce the risk of cross-threading during installation. The shell is treated with a corrosion-resistant trivalent plating, which eliminates the need for anti-seize compound and features corrugated ribs that help prevent flashover.\u003c\/p\u003e\u003cp\u003eThe NGK 4551 fits Yamaha outboard motors covered by NGK's O\/B fitment listing for the BR9HS-10 plug. Always confirm the correct plug against your engine's maintenance manual before installing, since using the wrong plug can reduce performance and fuel economy or damage the engine.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NGK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 4551\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK Plug Designation:\u003c\/strong\u003e BR9HS-10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistance:\u003c\/strong\u003e 5000 Ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Electrode Configuration:\u003c\/strong\u003e Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Electrode Core Material:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Core Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Tip Material:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsulator Material:\u003c\/strong\u003e Ceramic (alumina silicate)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlating:\u003c\/strong\u003e Trivalent, corrosion-resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 spark plug per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 087295145517\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha Outboard, 2004-1987\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the NGK 4551 spark plug fit?\u003c\/strong\u003e The NGK 4551 (BR9HS-10) is designed to fit Yamaha outboard motors covered under NGK's 2004-1987 O\/B Yamaha fitment listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the NGK 4551 the same as the BR9HS-10?\u003c\/strong\u003e Yes, 4551 and BR9HS-10 refer to the same NGK standard spark plug; BR9HS-10 is the plug's technical designation and 4551 is its part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the electrode material on this spark plug?\u003c\/strong\u003e The NGK 4551 uses a nickel ground electrode, a copper core center electrode, and a nickel center electrode tip.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a resistor-type spark plug?\u003c\/strong\u003e Yes, the NGK 4551 has a resistance rating of 5000 Ohm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plugs come in one package?\u003c\/strong\u003e Each package of the NGK 4551 contains 1 spark plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the NGK 4551 weigh?\u003c\/strong\u003e The NGK 4551 spark plug weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the NGK 4551 need anti-seize compound during installation?\u003c\/strong\u003e No, the trivalent plating on the NGK 4551 eliminates the need for anti-seize compound, and cold-rolled threads help prevent cross-threading during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of insulator does the NGK 4551 use?\u003c\/strong\u003e The NGK 4551 uses a high-grade alumina silicate ceramic insulator for strength and efficient heat transfer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the NGK 4551 compare to NGK's iridium or platinum plugs?\u003c\/strong\u003e The NGK 4551 is a standard nickel-electrode plug built for reliable OE-level performance, rather than the longer-service-interval precious-metal electrodes found in NGK's premium iridium or platinum lines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the NGK 4551 a genuine NGK product?\u003c\/strong\u003e Yes, the NGK 4551 (BR9HS-10) is manufactured by NGK as part of its Standard spark plug lineup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ground electrode configuration does the NGK 4551 use?\u003c\/strong\u003e The NGK 4551 uses a Standard ground electrode configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the NGK 4551 spark plug?\u003c\/strong\u003e The UPC for the NGK 4551 spark plug is 087295145517.\u003c\/p\u003e","brand":"NGK Spark Plugs","offers":[{"title":"Default Title","offer_id":49028253974747,"sku":"NGK-BR9HS-10","price":3.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/NGK-BR9HS-10__86464.1558187608.500.750.jpg?v=1785165228","url":"https:\/\/www.goodvibesmarina.com\/products\/ngk-4551-standard-spark-plug-br9hs-10-for-1987-2004-yamaha-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}