{"product_id":"merc-1023","title":"Mercury Spark Plug QL77JC4 896329828","description":"\u003cp data-start=\"42\" data-end=\"337\"\u003eRestore proper ignition performance and reliable engine starting with the \u003cstrong data-start=\"116\" data-end=\"158\"\u003eMercury Spark Plug QL77JC4 – 896329828\u003c\/strong\u003e. This genuine Mercury Marine OEM spark plug is designed for use in many Mercury and MerCruiser engines, providing consistent spark and reliable combustion in marine environments.\u003c\/p\u003e\n\u003cp data-start=\"339\" data-end=\"694\"\u003eThe QL77JC4 plug features a \u003cstrong data-start=\"367\" data-end=\"419\"\u003ecopper core center electrode and resistor design\u003c\/strong\u003e that helps improve conductivity and reduce radio frequency interference (RFI) that can affect onboard electronics. Marine-grade construction provides excellent corrosion resistance and reliable operation even under heavy engine loads. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"696\" data-end=\"708\"\u003eKey Features\u003c\/p\u003e\n\u003cul data-start=\"710\" data-end=\"1052\"\u003e\n\u003cli data-section-id=\"4e3flm\" data-start=\"710\" data-end=\"751\"\u003e\n\u003cp data-start=\"712\" data-end=\"751\"\u003eGenuine Mercury Marine OEM spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"otyzho\" data-start=\"752\" data-end=\"801\"\u003e\n\u003cp data-start=\"754\" data-end=\"801\"\u003e\u003cstrong data-start=\"754\" data-end=\"799\"\u003eChampion QL77JC4 marine spark plug design\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vyt2a5\" data-start=\"802\" data-end=\"871\"\u003e\n\u003cp data-start=\"804\" data-end=\"871\"\u003eCopper core electrode for improved conductivity and heat transfer\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"l3n64e\" data-start=\"872\" data-end=\"939\"\u003e\n\u003cp data-start=\"874\" data-end=\"939\"\u003eResistor design helps reduce radio frequency interference (RFI)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"q6j2wj\" data-start=\"940\" data-end=\"993\"\u003e\n\u003cp data-start=\"942\" data-end=\"993\"\u003eCorrosion-resistant shell for marine environments\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"grwmbb\" data-start=\"994\" data-end=\"1052\"\u003e\n\u003cp data-start=\"996\" data-end=\"1052\"\u003eProvides reliable ignition and smooth engine operation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1054\" data-end=\"1066\"\u003ePart Details\u003c\/p\u003e\n\u003cp data-start=\"1068\" data-end=\"1229\"\u003eOEM Part Number: \u003cstrong data-start=\"1085\" data-end=\"1098\"\u003e896329828\u003c\/strong\u003e\u003cbr data-start=\"1098\" data-end=\"1101\"\u003eMercury Reference Number: \u003cstrong data-start=\"1127\" data-end=\"1143\"\u003e33-896329828\u003c\/strong\u003e\u003cbr data-start=\"1143\" data-end=\"1146\"\u003eChampion Plug Number: \u003cstrong data-start=\"1168\" data-end=\"1186\"\u003eQL77JC4 \/ 828M\u003c\/strong\u003e\u003cbr data-start=\"1186\" data-end=\"1189\"\u003eProduct Type: Marine engine spark plug\u003c\/p\u003e\n\u003cp data-start=\"1231\" data-end=\"1364\"\u003eThread Size: \u003cstrong data-start=\"1244\" data-end=\"1253\"\u003e14 mm\u003c\/strong\u003e\u003cbr data-start=\"1253\" data-end=\"1256\"\u003eReach: \u003cstrong data-start=\"1263\" data-end=\"1275\"\u003e0.500 in\u003c\/strong\u003e\u003cbr data-start=\"1275\" data-end=\"1278\"\u003eSeat Type: \u003cstrong data-start=\"1289\" data-end=\"1302\"\u003eFlat seat\u003c\/strong\u003e\u003cbr data-start=\"1302\" data-end=\"1305\"\u003eHex Size: \u003cstrong data-start=\"1315\" data-end=\"1324\"\u003e20 mm\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1366\" data-end=\"1408\"\u003eTypical Packaging: Individual spark plug\u003c\/p\u003e\n\u003cp data-start=\"1410\" data-end=\"1449\"\u003eCompatible Mercury \u0026amp; MerCruiser Engines\u003c\/p\u003e\n\u003cp data-start=\"1451\" data-end=\"1522\"\u003eCommonly used on various Mercury and MerCruiser applications including:\u003c\/p\u003e\n\u003cp data-start=\"1524\" data-end=\"1541\"\u003eMercury Outboards\u003c\/p\u003e\n\u003cul data-start=\"1543\" data-end=\"1649\"\u003e\n\u003cli data-section-id=\"1liuvz1\" data-start=\"1543\" data-end=\"1609\"\u003e\n\u003cp data-start=\"1545\" data-end=\"1609\"\u003eMercury \u003cstrong data-start=\"1553\" data-end=\"1590\"\u003e7.5HP – 25HP two-stroke outboards\u003c\/strong\u003e (various models)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"epl1e3\" data-start=\"1610\" data-end=\"1649\"\u003e\n\u003cp data-start=\"1612\" data-end=\"1649\"\u003eSelect Mercury \u003cstrong data-start=\"1627\" data-end=\"1647\"\u003eSportJet engines\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1651\" data-end=\"1669\"\u003eMerCruiser Engines\u003c\/p\u003e\n\u003cul data-start=\"1671\" data-end=\"1726\"\u003e\n\u003cli data-section-id=\"7l7yts\" data-start=\"1671\" data-end=\"1726\"\u003e\n\u003cp data-start=\"1673\" data-end=\"1726\"\u003eSelect \u003cstrong data-start=\"1680\" data-end=\"1726\"\u003eSportJet and small gasoline marine engines\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1728\" data-end=\"1905\"\u003eThis spark plug is also used in various \u003cstrong data-start=\"1768\" data-end=\"1816\"\u003eJohnson, Evinrude, and Yamaha marine engines\u003c\/strong\u003e, depending on model and ignition specifications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1907\" data-end=\"1915\"\u003eFunction\u003c\/p\u003e\n\u003cp data-start=\"1917\" data-end=\"2122\"\u003eSpark plugs ignite the compressed air-fuel mixture inside the engine cylinder, allowing the engine to produce power. Proper spark plug performance is critical for smooth operation and efficient combustion.\u003c\/p\u003e\n\u003cp data-start=\"2124\" data-end=\"2157\"\u003eReplacing worn spark plugs helps:\u003c\/p\u003e\n\u003cul data-start=\"2159\" data-end=\"2312\"\u003e\n\u003cli data-section-id=\"xhnufg\" data-start=\"2159\" data-end=\"2198\"\u003e\n\u003cp data-start=\"2161\" data-end=\"2198\"\u003eImprove engine starting reliability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1n2tj6v\" data-start=\"2199\" data-end=\"2238\"\u003e\n\u003cp data-start=\"2201\" data-end=\"2238\"\u003eRestore proper ignition performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"h7bf5g\" data-start=\"2239\" data-end=\"2266\"\u003e\n\u003cp data-start=\"2241\" data-end=\"2266\"\u003ePrevent engine misfires\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"b0ntc6\" data-start=\"2267\" data-end=\"2312\"\u003e\n\u003cp data-start=\"2269\" data-end=\"2312\"\u003eMaintain fuel efficiency and engine power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2314\" data-end=\"2342\"\u003eImportant Compatibility Note\u003c\/p\u003e\n\u003cp data-start=\"2344\" data-end=\"2574\"\u003eSpark plugs vary depending on \u003cstrong data-start=\"2374\" data-end=\"2428\"\u003eengine model, ignition system, and production year\u003c\/strong\u003e. Always verify compatibility using the \u003cstrong data-start=\"2468\" data-end=\"2510\"\u003eengine serial number or owner’s manual\u003c\/strong\u003e before ordering to ensure the correct spark plug specification.\u003c\/p\u003e\n\u003cp data-start=\"2576\" data-end=\"2613\"\u003eCross-Stock \/ Superseded Part Numbers\u003c\/p\u003e\n\u003cul data-start=\"2615\" data-end=\"2876\"\u003e\n\u003cli data-section-id=\"1h22ex\" data-start=\"2615\" data-end=\"2670\"\u003e\n\u003cp data-start=\"2617\" data-end=\"2670\"\u003e\u003cstrong data-start=\"2617\" data-end=\"2633\"\u003e33-896329828\u003c\/strong\u003e – Mercury service reference number\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"frohzs\" data-start=\"2671\" data-end=\"2715\"\u003e\n\u003cp data-start=\"2673\" data-end=\"2715\"\u003e\u003cstrong data-start=\"2673\" data-end=\"2684\"\u003e33-828S\u003c\/strong\u003e – Earlier Mercury equivalent\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"fogy7c\" data-start=\"2716\" data-end=\"2772\"\u003e\n\u003cp data-start=\"2718\" data-end=\"2772\"\u003e\u003cstrong data-start=\"2718\" data-end=\"2745\"\u003eChampion 828M \/ QL77JC4\u003c\/strong\u003e – Manufacturer reference\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1m81umj\" data-start=\"2773\" data-end=\"2876\"\u003e\n\u003cp data-start=\"2775\" data-end=\"2876\"\u003e\u003cstrong data-start=\"2775\" data-end=\"2799\"\u003eNGK BZ7HS-10 \/ BR9HS\u003c\/strong\u003e – Common cross-reference equivalents \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2878\" data-end=\"2943\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563909152804,"sku":"896329828","price":17.63,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/d01d99af-facc-4f5f-9962-2f2c427ace5b.png?v=1773466420","url":"https:\/\/marisolmarine.com\/products\/merc-1023","provider":"Marisol Marine Company","version":"1.0","type":"link"}