{"product_id":"mercury-mercruiser-spark-plug-wire-kit-red-fits-gm-v-8-454-502-cid-engines-with-thunderbolt-iv-v-ignition-84-816608q61","title":"Mercury – Quicksilver 816608Q61 Red Wire Spark Plug Wire Kit | GM V8 Marine Engines (454–502 CID) | Thunderbolt IV \u0026 V Ignition | 816608Q61","description":"\u003cp data-start=\"0\" data-end=\"145\"\u003e\u003cstrong data-start=\"0\" data-end=\"143\"\u003eMercury – Quicksilver 816608Q61 Red Wire Spark Plug Wire Kit | GM V8 Marine Engines (454–502 CID) | Thunderbolt IV \u0026amp; V Ignition | 816608Q61\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"147\" data-end=\"150\"\u003e\n\u003ch3 data-start=\"152\" data-end=\"170\"\u003e\u003cstrong data-start=\"156\" data-end=\"168\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"171\" data-end=\"580\"\u003eThe right spark plug wires can bring an older engine back to life. The \u003cstrong data-start=\"242\" data-end=\"296\"\u003eQuicksilver 816608Q61 Red Wire Spark Plug Wire Kit\u003c\/strong\u003e is designed for \u003cstrong data-start=\"313\" data-end=\"369\"\u003evintage V8 GM-based MerCruiser engines (454–502 CID)\u003c\/strong\u003e using \u003cstrong data-start=\"376\" data-end=\"429\"\u003eThunderbolt IV and V ignition systems (1981–1997)\u003c\/strong\u003e. Built to Mercury’s standards, this OEM set keeps your ignition system firing clean and strong, restoring smooth starts and crisp throttle response.\u003c\/p\u003e\n\u003cp data-start=\"582\" data-end=\"808\"\u003eEach wire is precision-cut to factory length, finished in a tough red jacket that resists heat and moisture. It’s a direct-fit upgrade that installs easily and looks great while keeping your engine running the way it should.\u003c\/p\u003e\n\u003chr data-start=\"810\" data-end=\"813\"\u003e\n\u003ch3 data-start=\"815\" data-end=\"837\"\u003e\u003cstrong data-start=\"819\" data-end=\"835\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"840\" data-end=\"929\"\u003e\n\u003cstrong data-start=\"840\" data-end=\"852\"\u003ePurpose:\u003c\/strong\u003e Replaces old or damaged wires to restore clean, consistent spark delivery.\u003c\/li\u003e\n\u003cli data-start=\"932\" data-end=\"1057\"\u003e\n\u003cstrong data-start=\"932\" data-end=\"944\"\u003eFitment:\u003c\/strong\u003e For \u003cstrong data-start=\"949\" data-end=\"997\"\u003eV8 GM-based MerCruiser engines (454–502 CID)\u003c\/strong\u003e with \u003cstrong data-start=\"1003\" data-end=\"1054\"\u003eThunderbolt IV \u0026amp; V ignition systems (1981–1997)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1184\"\u003e\n\u003cstrong data-start=\"1060\" data-end=\"1077\"\u003eKit Contents:\u003c\/strong\u003e Includes a \u003cstrong data-start=\"1089\" data-end=\"1131\"\u003efull set of eight red spark plug wires\u003c\/strong\u003e with pre-installed boots for plug-end connections.\u003c\/li\u003e\n\u003cli data-start=\"1187\" data-end=\"1280\"\u003e\n\u003cstrong data-start=\"1187\" data-end=\"1198\"\u003eDesign:\u003c\/strong\u003e Each wire is \u003cstrong data-start=\"1212\" data-end=\"1229\"\u003ecustom-length\u003c\/strong\u003e for the correct plug location and clean routing.\u003c\/li\u003e\n\u003cli data-start=\"1283\" data-end=\"1390\"\u003e\n\u003cstrong data-start=\"1283\" data-end=\"1305\"\u003eMarine Durability:\u003c\/strong\u003e Built for \u003cstrong data-start=\"1316\" data-end=\"1360\"\u003eheat, vibration, and moisture resistance\u003c\/strong\u003e in harsh marine conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1392\" data-end=\"1395\"\u003e\n\u003ch3 data-start=\"1397\" data-end=\"1434\"\u003e\u003cstrong data-start=\"1401\" data-end=\"1432\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1437\" data-end=\"1488\"\u003eGM-based V8 MerCruiser engines (454 CID, 502 CID)\u003c\/li\u003e\n\u003cli data-start=\"1491\" data-end=\"1542\"\u003eThunderbolt IV and V ignition systems (1981–1997)\u003c\/li\u003e\n\u003cli data-start=\"1545\" data-end=\"1621\"\u003eCommon on performance cruisers, large tow boats, and classic offshore rigs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1623\" data-end=\"1626\"\u003e\n\u003ch3 data-start=\"1628\" data-end=\"1670\"\u003e\u003cstrong data-start=\"1632\" data-end=\"1668\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1671\" data-end=\"1993\"\u003eThe \u003cstrong data-start=\"1675\" data-end=\"1697\"\u003e816608Q61 wire kit\u003c\/strong\u003e keeps spark energy strong and even across all eight cylinders. With low-resistance cores and tight-fitting boots, these wires deliver full voltage for easy starts, smooth idle, and better fuel burn. You’ll feel the difference — quicker throttle response and a cleaner pull when you open it up.\u003c\/p\u003e\n\u003cp data-start=\"1995\" data-end=\"2225\"\u003eThe marine-grade insulation stands up to heat, vibration, and salt exposure without cracking or fading. The red jacket gives your engine bay a sharp, clean look while providing a durable layer of protection that lasts for years.\u003c\/p\u003e\n\u003chr data-start=\"2227\" data-end=\"2230\"\u003e\n\u003ch3 data-start=\"2232\" data-end=\"2253\"\u003e\u003cstrong data-start=\"2236\" data-end=\"2251\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2254\" data-end=\"2596\"\u003eMercury’s OEM ignition components are purpose-built for marine use — not rebranded automotive parts. Every Quicksilver wire set is tested for correct resistance, length, and durability in the toughest environments. Aftermarket kits often fall short, with materials that degrade faster or mismatched wire lengths that throw off spark timing.\u003c\/p\u003e\n\u003cp data-start=\"2598\" data-end=\"2798\"\u003eWith a \u003cstrong data-start=\"2605\" data-end=\"2637\"\u003egenuine Quicksilver wire kit\u003c\/strong\u003e, you get the right fit, the right resistance, and the same performance your engine had when it was new. It’s reliable, tested, and made for life on the water.\u003c\/p\u003e\n\u003chr data-start=\"2800\" data-end=\"2803\"\u003e\n\u003ch3 data-start=\"2805\" data-end=\"2818\"\u003e\u003cstrong data-start=\"2809\" data-end=\"2816\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2819\" data-end=\"2998\"\u003e\u003cstrong data-start=\"2819\" data-end=\"2875\"\u003eQ1: Which engines use the Quicksilver 816608Q61 kit?\u003c\/strong\u003e\u003cbr data-start=\"2875\" data-end=\"2878\"\u003eA: It fits \u003cstrong data-start=\"2889\" data-end=\"2937\"\u003eV8 GM-based MerCruiser engines (454–502 CID)\u003c\/strong\u003e with \u003cstrong data-start=\"2943\" data-end=\"2995\"\u003eThunderbolt IV or V ignition systems (1981–1997)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3000\" data-end=\"3120\"\u003e\u003cstrong data-start=\"3000\" data-end=\"3036\"\u003eQ2: How many wires are included?\u003c\/strong\u003e\u003cbr data-start=\"3036\" data-end=\"3039\"\u003eA: The kit includes \u003cstrong data-start=\"3059\" data-end=\"3078\"\u003eeight red wires\u003c\/strong\u003e, each pre-fitted with spark plug boots.\u003c\/p\u003e\n\u003cp data-start=\"3122\" data-end=\"3253\"\u003e\u003cstrong data-start=\"3122\" data-end=\"3161\"\u003eQ3: Can these be used in saltwater?\u003c\/strong\u003e\u003cbr data-start=\"3161\" data-end=\"3164\"\u003eA: Yes. They’re made from marine-rated materials that resist corrosion, salt, and heat.\u003c\/p\u003e\n\u003cp data-start=\"3255\" data-end=\"3390\"\u003e\u003cstrong data-start=\"3255\" data-end=\"3288\"\u003eQ4: Are they easy to install?\u003c\/strong\u003e\u003cbr data-start=\"3288\" data-end=\"3291\"\u003eA: Very. Replace one wire at a time to keep your firing order straight — no special tools needed.\u003c\/p\u003e\n\u003cp data-start=\"3392\" data-end=\"3564\"\u003e\u003cstrong data-start=\"3392\" data-end=\"3421\"\u003eQ5: Why choose OEM wires?\u003c\/strong\u003e\u003cbr data-start=\"3421\" data-end=\"3424\"\u003eA: OEM wires fit perfectly, perform better, and last longer under marine stress. You’ll get factory-quality performance without guesswork.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936071373091,"sku":"84-816608Q61","price":88.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/816608q61_main.jpg?v=1760631220","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-mercruiser-spark-plug-wire-kit-red-fits-gm-v-8-454-502-cid-engines-with-thunderbolt-iv-v-ignition-84-816608q61","provider":"PartsVu","version":"1.0","type":"link"}