{"product_id":"mercury-cable-assy-gray-84-857124a1","title":"Mercury – Gray Spark Plug Wire\/Lead | Ignition System Component | Durable Marine-Grade Construction | 857124A1","description":"\u003cp data-start=\"0\" data-end=\"126\"\u003e\u003cstrong data-start=\"0\" data-end=\"126\"\u003eMercury – Gray Spark Plug Wire\/Lead | Ignition System Component | Durable Marine-Grade Construction | 857124A1\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"128\" data-end=\"131\"\u003e\n\u003cp data-start=\"133\" data-end=\"696\"\u003e\u003cstrong data-start=\"133\" data-end=\"145\"\u003eOverview\u003c\/strong\u003e\u003cbr data-start=\"145\" data-end=\"148\"\u003eEvery boater knows that a smooth-running engine starts long before the key turns—it begins with a clean, strong spark. When you’re heading out before sunrise or easing back toward the dock at the end of a long day, you want to trust that your ignition system won’t miss a beat. That’s why a dependable spark plug wire matters more than most folks realize. The Mercury Marine part number 857124A1 Gray Spark Plug Wire\/Lead delivers the kind of steady, confident performance that keeps a two-stroke feeling lively and responsive, season after season.\u003c\/p\u003e\n\u003chr data-start=\"698\" data-end=\"701\"\u003e\n\u003cp data-start=\"703\" data-end=\"721\"\u003e\u003cstrong data-start=\"703\" data-end=\"719\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"722\" data-end=\"1128\"\u003e\n\u003cli data-start=\"722\" data-end=\"797\"\u003e\n\u003cp data-start=\"724\" data-end=\"797\"\u003eDelivers consistent spark transfer between ignition coil and spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"798\" data-end=\"883\"\u003e\n\u003cp data-start=\"800\" data-end=\"883\"\u003eFeatures marine-grade insulation to protect against heat, moisture, and vibration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"884\" data-end=\"974\"\u003e\n\u003cp data-start=\"886\" data-end=\"974\"\u003eIncludes molded plug boot on one end and coil boot on the other for secure connections\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"975\" data-end=\"1039\"\u003e\n\u003cp data-start=\"977\" data-end=\"1039\"\u003eDesigned for long-lasting flexibility and a tight, clean fit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1040\" data-end=\"1128\"\u003e\n\u003cp data-start=\"1042\" data-end=\"1128\"\u003eSuitable for a wide range of Mercury and Mariner outboards from 30 to 250 horsepower\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1130\" data-end=\"1133\"\u003e\n\u003cp data-start=\"1135\" data-end=\"1168\"\u003e\u003cstrong data-start=\"1135\" data-end=\"1166\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1169\" data-end=\"1493\"\u003e\n\u003cli data-start=\"1169\" data-end=\"1240\"\u003e\n\u003cp data-start=\"1171\" data-end=\"1240\"\u003eWorks with Mercury and Mariner 30–250 horsepower 2-stroke outboards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1241\" data-end=\"1321\"\u003e\n\u003cp data-start=\"1243\" data-end=\"1321\"\u003eCompatible with 2-, 3-, and 4-cylinder EFI, carbureted, and jet-drive models\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1322\" data-end=\"1390\"\u003e\n\u003cp data-start=\"1324\" data-end=\"1390\"\u003eFits XR2, JetDrive, and SportJet engines from 120–240 horsepower\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1391\" data-end=\"1493\"\u003e\n\u003cp data-start=\"1393\" data-end=\"1493\"\u003eIdeal for fishing boats, pontoons, offshore skiffs, aluminum rigs, jet boats, and family runabouts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1495\" data-end=\"1498\"\u003e\n\u003cp data-start=\"1500\" data-end=\"2017\"\u003e\u003cstrong data-start=\"1500\" data-end=\"1536\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003cbr data-start=\"1536\" data-end=\"1539\"\u003eA good spark plug wire does more than move electricity—it shapes the way your engine behaves. With the 857124A1 installed, you’ll feel the difference in every startup. The spark hits with a firm, steady pulse that helps the engine fire quickly, even on cooler mornings or after long periods of sitting. Once running, the wire keeps ignition timing smooth and predictable, cutting down on misfires, hesitation, and the subtle inconsistencies that can make an outboard feel tired.\u003c\/p\u003e\n\u003cp data-start=\"2019\" data-end=\"2480\"\u003eThe marine-grade insulation resists heat, moisture, and the constant vibration that comes with life on the water. That means no brittle cracking, no loose boots sliding off, and no unexpected interruptions just when you need the power most. The connection points fit tightly and securely, giving you that satisfying “click” that lets you know everything is seated exactly right. Installation is simple, requiring only basic tools and a few minutes of attention.\u003c\/p\u003e\n\u003cp data-start=\"2482\" data-end=\"2796\"\u003eWhat you really gain is peace of mind. With a fresh, properly engineered spark plug lead, the engine feels more confident at idle, steadier under load, and more responsive when you throttle up. It’s one of those upgrades that doesn’t look dramatic on the workbench but transforms how the engine feels on the water.\u003c\/p\u003e\n\u003chr data-start=\"2798\" data-end=\"2801\"\u003e\n\u003cp data-start=\"2803\" data-end=\"3356\"\u003e\u003cstrong data-start=\"2803\" data-end=\"2818\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003cbr data-start=\"2818\" data-end=\"2821\"\u003eIgnition components may look similar across brands, but performance tells the real story. A genuine Mercury Marine part like the 857124A1 uses the correct wire core, insulation thickness, and boot design to deliver reliable, balanced spark—something aftermarket versions often struggle to match. OEM parts fit right the first time, last longer, and handle the harsh marine environment far better. If you’re looking for a practical, dependable choice that keeps your outboard running strong, sticking with Mercury OEM is the smart move.\u003c\/p\u003e\n\u003chr data-start=\"3358\" data-end=\"3361\"\u003e\n\u003cp data-start=\"3363\" data-end=\"3370\"\u003e\u003cstrong data-start=\"3363\" data-end=\"3370\"\u003eFAQ\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3372\" data-end=\"3572\"\u003e\u003cstrong data-start=\"3372\" data-end=\"3440\"\u003eQ1: Which engines does the Mercury 857124A1 Spark Plug Wire fit?\u003c\/strong\u003e\u003cbr data-start=\"3440\" data-end=\"3443\"\u003eIt fits Mercury and Mariner 30–250 horsepower 2-stroke outboards, including EFI, carbureted, jet-drive, XR2, and SportJet models.\u003c\/p\u003e\n\u003cp data-start=\"3574\" data-end=\"3780\"\u003e\u003cstrong data-start=\"3574\" data-end=\"3640\"\u003eQ2: What makes this wire better than aftermarket alternatives?\u003c\/strong\u003e\u003cbr data-start=\"3640\" data-end=\"3643\"\u003eMercury’s marine-grade insulation, precise boot molding, and correct electrical resistance ensure cleaner spark delivery and longer life.\u003c\/p\u003e\n\u003cp data-start=\"3782\" data-end=\"3924\"\u003e\u003cstrong data-start=\"3782\" data-end=\"3839\"\u003eQ3: How do I know if this is the correct replacement?\u003c\/strong\u003e\u003cbr data-start=\"3839\" data-end=\"3842\"\u003eMatch your owner's or service manual to part number 857124A1 for accurate fitment.\u003c\/p\u003e\n\u003cp data-start=\"3926\" data-end=\"4083\"\u003e\u003cstrong data-start=\"3926\" data-end=\"4000\"\u003eQ4: Can this spark plug wire be used in both freshwater and saltwater?\u003c\/strong\u003e\u003cbr data-start=\"4000\" data-end=\"4003\"\u003eYes. It’s built to withstand moisture, heat, and corrosion in both environments.\u003c\/p\u003e\n\u003cp data-start=\"4085\" data-end=\"4246\"\u003e\u003cstrong data-start=\"4085\" data-end=\"4137\"\u003eQ5: Is installation simple for most boat owners?\u003c\/strong\u003e\u003cbr data-start=\"4137\" data-end=\"4140\"\u003eAbsolutely. With basic tools and careful seating of both boots, installation is quick and straightforward.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626559234339,"sku":"84-857124A1","price":14.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/857124a1_main-1.jpg?v=1760631257","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-cable-assy-gray-84-857124a1","provider":"PartsVu","version":"1.0","type":"link"}