{"product_id":"mercury-ac-mr43lts-33-862029-sold-individually","title":"Mercury – ACDelco MR43LTS Marine Spark Plug | Specialty Marine Ignition Series | Nickel Alloy \u0026amp; Copper Core | 862029","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – ACDelco MR43LTS Marine Spark Plug | Specialty Marine Ignition Series | Nickel Alloy \u0026amp; Copper Core | 862029\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e There’s something satisfying about a marine engine that fires up instantly—a crisp spark, a steady rumble, and the quiet assurance that today’s trip is going to go smoothly. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen you spend your weekends on the water, you start to appreciate the parts that make those easy starts possible. The Mercury Marine part number 862029 ACDelco MR43LTS Spark Plug is one of those small but essential components. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s built\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to hold up in a harsh marine environment and deliver a consistent spark that keeps your engine running strong, whether you’re idling out of the marina or opening up the throttle across open water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSpecialty marine spark plug built with a nickel alloy tip and copper core for durability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eRibbed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e suppressor seal helps reduce misfires and improve ignition stability\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePre-gapped to manufacturer specifications for easy installation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned to match Mercury Marine OEM ignition requirements\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSupports smooth starts, clean combustion, and reliable overall engine performance\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e a wide range of Mercury and MerCruiser \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003emarine engines requiring MR43LTS plugs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCommonly used in sterndrive and inboard platforms built by General Motors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for cruisers, sport boats, runabouts, pontoon boats, and other recreational vessels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eAlways verify fit using your owner’s manual recommendations\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e A great spark plug doesn’t call much attention to itself, but you notice the difference every time you start the engine.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e With the 862029 ACDelco MR43LTS installed, your ignition feels tight, responsive, and predictable. Engines start faster, idle smoother, and run cleaner thanks to the copper core’s excellent heat transfer and the nickel alloy’s ability to resist wear in demanding marine conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eUnderway, the plug supports a steady spark that keeps your engine running at its best—whether you’re cruising at low speed, towing a wakeboarder, or heading into deeper water for a full day offshore. Combustion feels smoother, throttle response steadier, and overall performance more dependable.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhat boaters really appreciate is how forgiving and straightforward installation is. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBecause the plug comes pre-gapped based on engine specifications, you \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003esimply\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e remove the old plug, thread this one in, tighten it properly, and get back on the water\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e No\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e complicated prep, no guesswork.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDurability is another highlight. The ribbed suppressor cap helps reduce flashover and supports long-term ignition stability, even in damp or salty environments. Instead of cleaning old plugs—an approach that rarely restores full performance—you’ll get stronger results and better protection by replacing them outright.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Choosing a Mercury OEM-recommended spark plug means choosing a part engineered precisely for your engine’s ignition system. A\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eftermarket plugs may look similar, but slight differences in heat range, electrode material, or gap accuracy can lead to rough starts, reduced power, or long-term engine wear. With an OEM-fit MR43LTS plug, you’re getting the exact ignition performance Mercury intended—reliable, clean, and built for marine conditions. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e’s \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ea smart\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003einexpensive way to protect your investment and enjoy better performance every \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003etrip\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines use the 862029 MR43LTS Spark Plug?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s designed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e for Mercury and MerCruiser engines that specify MR43LTS plugs. Always confirm with your owner’s manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this spark plug different from aftermarket versions?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003euses\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e OEM-approved materials, proper heat range, and factory-set \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003egapping\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to ensure reliable\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eaccurate ignition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm this is the correct replacement?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your engine’s spark plug chart or owner’s manual for MR43LTS. If listed, this is the correct part number.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in both freshwater and saltwater environments?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes—the materials and seal construction are designed for harsh, wet, and corrosive marine conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation easy for most boat owners?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Definitely. With a spark plug socket and basic hand tools, installation is \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003esimple and \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003equick\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626535805219,"sku":"33-862029","price":7.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/33-862029.jpg?v=1761308135","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-ac-mr43lts-33-862029-sold-individually","provider":"PartsVu","version":"1.0","type":"link"}