{"product_id":"acdelco-mr43t-marine-spark-plug-gm-5613438","title":"ACDelco MR43T Marine Spark Plug – GM Part #5613438","description":"\u003ch3\u003e\u003cspan\u003eReplacement Spark Plug for Compatible Marine Inboard Engines\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eKeep your boat's ignition system properly maintained with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eACDelco MR43T Spark Plug\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, a replacement spark plug used in select carbureted and throttle body injection (TBI) marine engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eACDelco MR43T\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, also identified by \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGM part number 5613438\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, is commonly used in older inboard marine engine applications, including compatible engines found in tournament ski boats and wakeboard boats.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned for engines using \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epre-Vortec cylinder heads\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, this spark plug is a replacement option for many carbureted marine engines and certain throttle body injection configurations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhether you're performing routine ignition maintenance, replacing worn spark plugs, or servicing an older inboard boat engine, choosing the correct spark plug is important for reliable ignition performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor many compatible \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIndmar marine engine applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the specified spark plug gap is \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e0.035 inches\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. However, the correct gap should always be verified against your particular engine's service specifications before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant: Spark plugs are sold individually. Price is for one (1) spark plug.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features \u0026amp; Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eACDelco MR43T Spark Plug:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Replacement ignition component for compatible marine engines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGM Part #5613438:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Identifying part number for replacement and fitment searches.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMarine Engine Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Used in select inboard tournament ski and wakeboard boat engines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCarbureted Engine Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Fits many compatible carbureted marine engine configurations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eThrottle Body Injection Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Used in certain TBI marine engines.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePre-Vortec Cylinder Heads:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Intended for applicable engines equipped with pre-Vortec cylinder heads.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIndmar Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Used in select Indmar marine engines requiring the MR43T spark plug.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCommon Gap Specification:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.035\" for many applicable Indmar engines; verify before installation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eIndividual Replacement:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Sold as one spark plug for maintenance or replacement needs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ACDelco\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePart Number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e MR43T\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eGM Part Number:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5613438\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Marine Engine Spark Plug\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compatible Inboard Marine Engines\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFuel System Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Select Carbureted and Throttle Body Injection Engines\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCylinder Head Application:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Pre-Vortec\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCommon Indmar Spark Plug Gap:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 0.035\" (Verify for Your Engine)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eQuantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1 Spark Plug\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSold As:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Individual Unit\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eMarine Spark Plug for Carbureted and TBI Engines\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eACDelco MR43T\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is used in a range of older marine engine applications that require this specific spark plug.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is commonly associated with carbureted marine engines and certain throttle body injection systems, particularly engines equipped with pre-Vortec cylinder heads.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThese applications can include engines installed in tournament ski boats and wakeboard boats.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBecause spark plug requirements vary by engine manufacturer, model, and production year, always confirm the MR43T part number before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eACDelco MR43T Spark Plug Gap\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eFor many \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIndmar engines requiring the ACDelco MR43T\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the commonly specified spark plug gap is:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.035 inches\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe correct gap may vary by engine application.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlways consult your engine's service manual or manufacturer specifications before adjusting or installing the spark plug.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation and Maintenance Recommendations\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eProper spark plug installation helps protect engine components and supports reliable ignition system operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSpark Plug Gap\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCheck the electrode gap before installation and adjust only when appropriate for the specific spark plug and engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAluminum Cylinder Heads\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe supplied application guidance recommends anti-seize compound for certain aluminum cylinder head applications, including applicable Hammerhead and Corvette marine engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHowever, spark plug manufacturers may specify different installation procedures depending on plug construction and thread coatings. Confirm whether anti-seize is recommended for your exact engine and spark plug before applying it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDielectric Grease\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAppropriate dielectric grease may be applied to the inside of compatible spark plug boots according to the manufacturer's instructions to help prevent the boots from sticking and tearing during future removal.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eInstallation Torque\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAlways follow the correct spark plug tightening specifications for your engine and cylinder head material.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCompatible Marine Engine Applications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe ACDelco MR43T may be used in select:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eIndmar marine engines specifying MR43T spark plugs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCarbureted inboard marine engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThrottle body injection (TBI) marine engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePre-Vortec GM-based marine engine configurations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTournament ski boat and wakeboard boat engines requiring GM #5613438\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFitment Note:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Not all Indmar, GM-based, Hammerhead, Corvette, or other marine engines use this spark plug. Verify the engine's required part number and specifications before purchasing.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhat's Included?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e(1) ACDelco MR43T Spark Plug – GM #5613438\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSOLD INDIVIDUALLY — ONE SPARK PLUG PER ORDERED UNIT.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor multi-cylinder engine maintenance, order the appropriate quantity based on your engine's spark plug requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWho Is This Spark Plug For?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eACDelco MR43T Marine Spark Plug\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is intended for:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOwners of compatible older inboard ski and wakeboard boats\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMarine technicians servicing carbureted engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOwners maintaining select TBI marine engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCustomers replacing spark plugs in compatible pre-Vortec engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIndmar engine owners whose service specifications call for the MR43T\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaintain your compatible marine engine's ignition system with the ACDelco MR43T Spark Plug, available individually from Bakes Marine.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca class=\"SmallNav\" href=\"\/bakes-resource-library\"\u003eBakes Resource Library:\u003c\/a\u003e\u003c\/strong\u003e\u003ca\u003e\u003cbr\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/resource-library-pdf?file=IndmarSparkPlugChart.pdf\" rel=\"noopener\" target=\"_blank\"\u003eIndmar Spark Plug \u0026amp; Spark Plug Wire Reference Chart (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AC Delco","offers":[{"title":"Default Title","offer_id":40905876439120,"sku":"808709617204","price":3.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0566\/1304\/4304\/files\/acdelco-mr43t-marine-spark-plug-gm-5613438.jpg?v=1792610380","url":"https:\/\/bakesonline.com\/products\/acdelco-mr43t-marine-spark-plug-gm-5613438","provider":"Bakes Online","version":"1.0","type":"link"}