{"product_id":"mercury-mercruiser-spark-plug-wire-kit-fits-gm-v-8-305-350-cid-engines-with-thunderbolt-iv-ignition-84-816761q3","title":"Mercury – Quicksilver 816761Q3 Spark Plug Wire Kit | V8 GM MerCruiser (RH) Engines (305 \u0026 350 CID) | Thunderbolt IV Ignition | 816761Q3","description":"\u003cp data-start=\"0\" data-end=\"141\"\u003e\u003cstrong data-start=\"0\" data-end=\"139\"\u003eMercury – Quicksilver 816761Q3 Spark Plug Wire Kit | V8 GM MerCruiser (RH) Engines (305 \u0026amp; 350 CID) | Thunderbolt IV Ignition | 816761Q3\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"143\" data-end=\"146\"\u003e\n\u003ch3 data-start=\"148\" data-end=\"166\"\u003e\u003cstrong data-start=\"152\" data-end=\"164\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"167\" data-end=\"461\"\u003eWhen your engine fires clean and smooth, you can feel the difference right away. The \u003cstrong data-start=\"252\" data-end=\"296\"\u003eQuicksilver 816761Q3 Spark Plug Wire Kit\u003c\/strong\u003e brings that performance back to your \u003cstrong data-start=\"334\" data-end=\"396\"\u003eV8 right-hand rotation MerCruiser engine (305 and 350 CID)\u003c\/strong\u003e equipped with \u003cstrong data-start=\"411\" data-end=\"458\"\u003eThunderbolt IV ignition systems (1981–1993)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"463\" data-end=\"810\"\u003eThis OEM kit includes a full set of plug wires built to factory specifications — the right length, resistance, and fit for your motor. Each wire features marine-grade insulation to handle the heat, vibration, and moisture that come with boating life. Swap them in, and your MerCruiser will fire stronger, idle smoother, and run more efficiently.\u003c\/p\u003e\n\u003chr data-start=\"812\" data-end=\"815\"\u003e\n\u003ch3 data-start=\"817\" data-end=\"839\"\u003e\u003cstrong data-start=\"821\" data-end=\"837\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"842\" data-end=\"935\"\u003e\n\u003cstrong data-start=\"842\" data-end=\"854\"\u003ePurpose:\u003c\/strong\u003e Replaces aging or damaged wires to restore proper ignition and spark strength.\u003c\/li\u003e\n\u003cli data-start=\"938\" data-end=\"1086\"\u003e\n\u003cstrong data-start=\"938\" data-end=\"950\"\u003eFitment:\u003c\/strong\u003e For \u003cstrong data-start=\"955\" data-end=\"1030\"\u003eV8 RH (right-hand rotation) GM-based MerCruiser engines (305 \u0026amp; 350 CID)\u003c\/strong\u003e with \u003cstrong data-start=\"1036\" data-end=\"1083\"\u003eThunderbolt IV ignition systems (1981–1993)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1089\" data-end=\"1181\"\u003e\n\u003cstrong data-start=\"1089\" data-end=\"1106\"\u003eKit Contents:\u003c\/strong\u003e Complete \u003cstrong data-start=\"1116\" data-end=\"1143\"\u003eset of spark plug wires\u003c\/strong\u003e, each pre-fitted with molded boots.\u003c\/li\u003e\n\u003cli data-start=\"1184\" data-end=\"1266\"\u003e\n\u003cstrong data-start=\"1184\" data-end=\"1195\"\u003eDesign:\u003c\/strong\u003e \u003cstrong data-start=\"1196\" data-end=\"1220\"\u003eFactory-length wires\u003c\/strong\u003e ensure clean routing and proper plug reach.\u003c\/li\u003e\n\u003cli data-start=\"1269\" data-end=\"1353\"\u003e\n\u003cstrong data-start=\"1269\" data-end=\"1284\"\u003eDurability:\u003c\/strong\u003e Designed for \u003cstrong data-start=\"1298\" data-end=\"1350\"\u003emarine heat, vibration, and corrosion resistance\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1355\" data-end=\"1358\"\u003e\n\u003ch3 data-start=\"1360\" data-end=\"1397\"\u003e\u003cstrong data-start=\"1364\" data-end=\"1395\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1400\" data-end=\"1461\"\u003eGM-based MerCruiser V8 engines (305 \u0026amp; 350 CID, RH rotation)\u003c\/li\u003e\n\u003cli data-start=\"1464\" data-end=\"1509\"\u003eThunderbolt IV ignition systems (1981–1993)\u003c\/li\u003e\n\u003cli data-start=\"1512\" data-end=\"1563\"\u003eCommon in cruisers, inboards, and sport runabouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1565\" data-end=\"1568\"\u003e\n\u003ch3 data-start=\"1570\" data-end=\"1612\"\u003e\u003cstrong data-start=\"1574\" data-end=\"1610\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1613\" data-end=\"1932\"\u003eThe \u003cstrong data-start=\"1617\" data-end=\"1629\"\u003e816761Q3\u003c\/strong\u003e wire kit helps your ignition system deliver strong, consistent voltage to every plug. The result? Easier starts, smoother idle, and clean acceleration across the power band. The low-resistance cores maintain voltage integrity, while the thick insulation prevents arcing even under heat and vibration.\u003c\/p\u003e\n\u003cp data-start=\"1934\" data-end=\"2148\"\u003eEach wire is molded for a tight seal at both ends, keeping moisture and debris out. Once installed, you’ll enjoy reliable spark energy and confident performance — the kind you can feel every time you throttle up.\u003c\/p\u003e\n\u003chr data-start=\"2150\" data-end=\"2153\"\u003e\n\u003ch3 data-start=\"2155\" data-end=\"2176\"\u003e\u003cstrong data-start=\"2159\" data-end=\"2174\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2177\" data-end=\"2421\"\u003eMercury’s OEM ignition components are made for the marine environment — not adapted from automotive designs. Every Quicksilver wire is tested for length, resistance, and flexibility to ensure consistent ignition under harsh marine conditions.\u003c\/p\u003e\n\u003cp data-start=\"2423\" data-end=\"2709\"\u003eAftermarket wires can vary in size or material quality, leading to misfires or premature failure. With a \u003cstrong data-start=\"2528\" data-end=\"2560\"\u003egenuine Quicksilver wire kit\u003c\/strong\u003e, you’re getting the same durability, fit, and spark performance your engine was designed for — tested and proven in real-world boating conditions.\u003c\/p\u003e\n\u003chr data-start=\"2711\" data-end=\"2714\"\u003e\n\u003ch3 data-start=\"2716\" data-end=\"2729\"\u003e\u003cstrong data-start=\"2720\" data-end=\"2727\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2730\" data-end=\"2934\"\u003e\u003cstrong data-start=\"2730\" data-end=\"2784\"\u003eQ1: What engines fit the Quicksilver 816761Q3 kit?\u003c\/strong\u003e\u003cbr data-start=\"2784\" data-end=\"2787\"\u003eA: It’s designed for \u003cstrong data-start=\"2808\" data-end=\"2878\"\u003eV8 right-hand rotation GM-based MerCruiser engines (305 \u0026amp; 350 CID)\u003c\/strong\u003e with \u003cstrong data-start=\"2884\" data-end=\"2931\"\u003eThunderbolt IV ignition systems (1981–1993)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2936\" data-end=\"3064\"\u003e\u003cstrong data-start=\"2936\" data-end=\"2972\"\u003eQ2: How many wires are included?\u003c\/strong\u003e\u003cbr data-start=\"2972\" data-end=\"2975\"\u003eA: The kit includes \u003cstrong data-start=\"2995\" data-end=\"3021\"\u003eeight spark plug wires\u003c\/strong\u003e, each cut to the correct factory length.\u003c\/p\u003e\n\u003cp data-start=\"3066\" data-end=\"3216\"\u003e\u003cstrong data-start=\"3066\" data-end=\"3111\"\u003eQ3: Can these wires handle saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"3111\" data-end=\"3114\"\u003eA: Yes. They’re made from corrosion-resistant materials suitable for both salt and freshwater boats.\u003c\/p\u003e\n\u003cp data-start=\"3218\" data-end=\"3342\"\u003e\u003cstrong data-start=\"3218\" data-end=\"3251\"\u003eQ4: Are they easy to install?\u003c\/strong\u003e\u003cbr data-start=\"3251\" data-end=\"3254\"\u003eA: Yes. Replace one wire at a time to maintain firing order — no special tools needed.\u003c\/p\u003e\n\u003cp data-start=\"3344\" data-end=\"3505\"\u003e\u003cstrong data-start=\"3344\" data-end=\"3377\"\u003eQ5: Why OEM over aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3377\" data-end=\"3380\"\u003eA: OEM wires guarantee the right resistance, length, and marine-ready materials for long-lasting, trouble-free performance.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936069308707,"sku":"84-816761Q3","price":81.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/816761q3_main.jpg?v=1760631230","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-mercruiser-spark-plug-wire-kit-fits-gm-v-8-305-350-cid-engines-with-thunderbolt-iv-ignition-84-816761q3","provider":"PartsVu","version":"1.0","type":"link"}