{"product_id":"ac-delco-mr43t-iridium-spark-plug-cross-reference-mercury-33-8m0204752-ngk-br6fs","title":"AC Delco MR43T Iridium Spark Plug - Cross-Reference Mercury 33-8M0204752, NGK BR6FS","description":"\u003cp\u003eThe AC Delco MR43T is an iridium spark plug built for outstanding strength and high-temperature resistance. It uses a nickel alloy tip paired with a copper core, a combination chosen to maximize heat transfer while the iridium electrode construction holds up to sustained high melting-point conditions. A ribbed suppressor seal is fitted to support durability and consistent performance over the plug's service life.\u003c\/p\u003e\u003cp\u003eBecause the electrode is laser-welded, the MR43T is designed to deliver reliable cold starting along with quick acceleration and smooth engine performance once the engine is running. It is a genuine AC Delco part rather than a generic aftermarket substitute, and it cross-references to plug numbers used across several other brands, making it a straightforward replacement option for engines originally fitted with the equivalent Mercury, Donovon, or NGK plug.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e AC Delco\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e ACDEMR43T\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Spark Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrode Construction:\u003c\/strong\u003e Iridium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Material:\u003c\/strong\u003e Nickel alloy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Ribbed suppressor seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808709617204\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eNo specific make, horsepower, or model fitment is listed for this part; it is cross-referenced by plug equivalence.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury 33-8M0204752\u003c\/li\u003e\n\u003cli\u003eDonovon 203276\u003c\/li\u003e\n\u003cli\u003eNGK BR6FS\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the AC Delco MR43T spark plug cross-reference to?\u003c\/strong\u003e The MR43T cross-references to Mercury 33-8M0204752, Donovon 203276, and NGK BR6FS, so any engine specifying one of those plug numbers can use the AC Delco MR43T instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the MR43T an iridium spark plug?\u003c\/strong\u003e Yes, the AC Delco MR43T uses iridium electrode construction, which is built for a high melting point and outstanding strength and heat resistance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the MR43T's electrode tip made of?\u003c\/strong\u003e The AC Delco MR43T has a nickel alloy tip combined with a copper core, a pairing intended to support heat transfer and plug durability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the MR43T work as a replacement for an NGK BR6FS plug?\u003c\/strong\u003e Yes, NGK BR6FS is listed as a direct cross-reference for the AC Delco MR43T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the AC Delco MR43T weigh?\u003c\/strong\u003e The AC Delco MR43T weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the AC Delco MR43T spark plug?\u003c\/strong\u003e The UPC for the AC Delco MR43T is 808709617204.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the MR43T help with cold starting?\u003c\/strong\u003e Reliable cold starting is one of the stated benefits of the AC Delco MR43T's iridium construction, along with quick acceleration and smooth engine performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat kind of seal does the MR43T use?\u003c\/strong\u003e The AC Delco MR43T is fitted with a ribbed suppressor seal for durability and performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the AC Delco MR43T a genuine AC Delco part or an aftermarket copy?\u003c\/strong\u003e The MR43T is a genuine AC Delco iridium spark plug, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Mercury part number does the AC Delco MR43T replace?\u003c\/strong\u003e The AC Delco MR43T cross-references to Mercury part number 33-8M0204752.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy is the electrode laser-welded on the MR43T?\u003c\/strong\u003e The AC Delco MR43T's electrode is laser-welded as part of its iridium construction, supporting durability alongside its high melting point rating.\u003c\/p\u003e","brand":"AC Delco","offers":[{"title":"Default Title","offer_id":49027424583899,"sku":"ACD-MR43T","price":3.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/ACD-MR43T__34493.1747363841.500.750.jpg?v=1785163227","url":"https:\/\/www.goodvibesmarina.com\/products\/ac-delco-mr43t-iridium-spark-plug-cross-reference-mercury-33-8m0204752-ngk-br6fs","provider":"Good Vibes Marina","version":"1.0","type":"link"}