{"product_id":"mercury-ngk-izfr6j-4-33-843220q","title":"Mercury – Quicksilver NGK IZFR6J Laser Iridium Spark Plug | Marine Ignition Component | Sold Individually | 843220Q","description":"\u003cp data-start=\"0\" data-end=\"110\"\u003e\u003cstrong data-start=\"0\" data-end=\"108\"\u003eMercury – Quicksilver NGK IZFR6J Laser Iridium Spark Plug | Marine Ignition Component | Sold Individually | 843220Q\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"112\" data-end=\"115\"\u003e\n\u003ch3 data-start=\"117\" data-end=\"135\"\u003e\u003cstrong data-start=\"121\" data-end=\"133\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"136\" data-end=\"587\"\u003eThe \u003cstrong data-start=\"140\" data-end=\"199\"\u003eQuicksilver 843220Q NGK IZFR6J Laser Iridium Spark Plug\u003c\/strong\u003e is built to give your Mercury outboard dependable starts, smooth power, and long service life. It’s the same high-quality plug trusted by \u003cstrong data-start=\"338\" data-end=\"356\"\u003eMercury Marine\u003c\/strong\u003e for factory performance, designed to handle the heat and vibration of real-world boating. Each plug comes pre-gapped and ready to install, so you can get back on the water quickly and know your engine is firing right every time.\u003c\/p\u003e\n\u003chr data-start=\"589\" data-end=\"592\"\u003e\n\u003ch3 data-start=\"594\" data-end=\"616\"\u003e\u003cstrong data-start=\"598\" data-end=\"614\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"619\" data-end=\"720\"\u003e\n\u003cstrong data-start=\"619\" data-end=\"631\"\u003ePurpose:\u003c\/strong\u003e Provides consistent spark for reliable ignition, smooth idle, and efficient fuel burn.\u003c\/li\u003e\n\u003cli data-start=\"723\" data-end=\"834\"\u003e\n\u003cstrong data-start=\"723\" data-end=\"736\"\u003eMaterial:\u003c\/strong\u003e Built with a laser-welded iridium tip and copper core for better conductivity and heat control.\u003c\/li\u003e\n\u003cli data-start=\"837\" data-end=\"943\"\u003e\n\u003cstrong data-start=\"837\" data-end=\"853\"\u003ePerformance:\u003c\/strong\u003e Delivers cleaner combustion, longer life, and easier starts compared to standard plugs.\u003c\/li\u003e\n\u003cli data-start=\"946\" data-end=\"1057\"\u003e\n\u003cstrong data-start=\"946\" data-end=\"957\"\u003eDesign:\u003c\/strong\u003e Features a ribbed ceramic insulator that helps prevent flashover and reduces misfires under load.\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1163\"\u003e\n\u003cstrong data-start=\"1060\" data-end=\"1084\"\u003eEase of Use\/Install:\u003c\/strong\u003e Pre-gapped to OEM specs and installs easily with a common spark plug socket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1165\" data-end=\"1168\"\u003e\n\u003ch3 data-start=\"1170\" data-end=\"1193\"\u003e\u003cstrong data-start=\"1174\" data-end=\"1191\"\u003eCompatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1196\" data-end=\"1299\"\u003e\n\u003cstrong data-start=\"1196\" data-end=\"1208\"\u003eEngines:\u003c\/strong\u003e Mercury Marine outboards and compatible marine engines (verify with your owner’s manual)\u003c\/li\u003e\n\u003cli data-start=\"1302\" data-end=\"1339\"\u003e\n\u003cstrong data-start=\"1302\" data-end=\"1315\"\u003eReplaces:\u003c\/strong\u003e NGK IZFR6J Spark Plug\u003c\/li\u003e\n\u003cli data-start=\"1342\" data-end=\"1413\"\u003e\n\u003cstrong data-start=\"1342\" data-end=\"1353\"\u003eUse On:\u003c\/strong\u003e Outboards | Sterndrives | Jet Boats | Powersports Engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1415\" data-end=\"1418\"\u003e\n\u003ch3 data-start=\"1420\" data-end=\"1463\"\u003e\u003cstrong data-start=\"1424\" data-end=\"1461\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1464\" data-end=\"1898\"\u003eBoaters who switch to the \u003cstrong data-start=\"1490\" data-end=\"1513\"\u003eIZFR6J Iridium plug\u003c\/strong\u003e often notice faster starts, smoother throttle response, and better fuel efficiency. The iridium tip holds its edge far longer than standard electrodes, meaning more reliable spark over time. NGK’s ceramic insulator helps the plug stay cooler and cleaner, even after long days on the water. It’s the kind of part you install once and don’t have to think about again for a long while.\u003c\/p\u003e\n\u003chr data-start=\"1900\" data-end=\"1903\"\u003e\n\u003ch3 data-start=\"1905\" data-end=\"1929\"\u003e\u003cstrong data-start=\"1909\" data-end=\"1927\"\u003eWhy Choose OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1930\" data-end=\"2363\"\u003eChoosing \u003cstrong data-start=\"1939\" data-end=\"1972\"\u003eQuicksilver and NGK OEM parts\u003c\/strong\u003e means you’re using components designed exactly for your engine—not a close copy. OEM plugs match Mercury’s exact heat range, thread depth, and gap settings to keep performance consistent. Aftermarket versions can fall short on fit or wear faster, which affects power and efficiency. With OEM, you’re getting the same dependable quality your motor was built with, and that’s worth keeping.\u003c\/p\u003e\n\u003chr data-start=\"2365\" data-end=\"2368\"\u003e\n\u003ch3 data-start=\"2370\" data-end=\"2383\"\u003e\u003cstrong data-start=\"2374\" data-end=\"2381\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2384\" data-end=\"2553\"\u003e\u003cstrong data-start=\"2384\" data-end=\"2435\"\u003eQ1: Are these plugs pre-gapped and ready to go?\u003c\/strong\u003e\u003cbr data-start=\"2435\" data-end=\"2438\"\u003eYes, they come pre-gapped at the correct setting for Mercury outboards. Just double-check your manual to be sure.\u003c\/p\u003e\n\u003cp data-start=\"2555\" data-end=\"2709\"\u003e\u003cstrong data-start=\"2555\" data-end=\"2601\"\u003eQ2: Can I mix these with other plug types?\u003c\/strong\u003e\u003cbr data-start=\"2601\" data-end=\"2604\"\u003eIt’s best not to. Replacing all your plugs at once with the same type ensures smooth, even performance.\u003c\/p\u003e\n\u003cp data-start=\"2711\" data-end=\"2872\"\u003e\u003cstrong data-start=\"2711\" data-end=\"2771\"\u003eQ3: How long will these last compared to standard plugs?\u003c\/strong\u003e\u003cbr data-start=\"2771\" data-end=\"2774\"\u003eIridium plugs last much longer—often two to three times the lifespan of traditional copper ones.\u003c\/p\u003e\n\u003cp data-start=\"2874\" data-end=\"3027\"\u003e\u003cstrong data-start=\"2874\" data-end=\"2920\"\u003eQ4: Do they resist corrosion in saltwater?\u003c\/strong\u003e\u003cbr data-start=\"2920\" data-end=\"2923\"\u003eYes, the trivalent metal plating keeps them from seizing and helps protect against rust in marine use.\u003c\/p\u003e\n\u003cp data-start=\"3029\" data-end=\"3139\"\u003e\u003cstrong data-start=\"3029\" data-end=\"3059\"\u003eQ5: What’s in the package?\u003c\/strong\u003e\u003cbr data-start=\"3059\" data-end=\"3062\"\u003eEach box includes one NGK Laser Iridium spark plug, ready for installation.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46932966080803,"sku":"PV687393","price":25.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/IMG_7871.jpg?v=1747687286","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-ngk-izfr6j-4-33-843220q","provider":"PartsVu","version":"1.0","type":"link"}