{"product_id":"mercruiser-outdrive-housing-mounting-gasket-replaces-27-94996a2-sierra-18-2743-mpn-118-2743","title":"Sierra 18-2743 Drive Shaft Housing to Bell Housing Gasket, Replaces 19543A4 - Mercruiser Outdrive","description":"\u003cp\u003eThe Sierra 18-2743 is a Drive Shaft Housing to Bell Housing Gasket designed to seal the joint between the drive shaft housing and bell housing on Mercruiser outdrives. As part of Sierra's Mercruiser Bell Housing Gasket lineup, this gasket restores a proper seal at this mating surface, helping prevent water intrusion and gear lubricant leakage at the housing joint. Each gasket is supplied one per application, matching the original factory fitment at this connection point.\u003c\/p\u003e\u003cp\u003eAt 0.06 pounds, the 18-2743 is a light, compact component intended to be replaced whenever the drive shaft housing or bell housing is removed for service, since gaskets should not be reused once disturbed. It cross-references to OEM numbers 19543A4 and 27-94996-2, making it a straightforward replacement for boat owners and marine technicians servicing Mercruiser outdrive lower units.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2743\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Drive Shaft Housing to Bell Housing Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Bell Housing Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999775771\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.06 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Required:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 19543A4, 27-94996-2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercruiser outdrives at the drive shaft housing to bell housing joint.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e19543A4\u003c\/li\u003e\n\u003cli\u003e27-94996-2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2743 gasket seal?\u003c\/strong\u003e The Sierra 18-2743 seals the joint between the drive shaft housing and the bell housing on a Mercruiser outdrive, preventing water intrusion and lubricant leakage at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2743 the same as OEM part 19543A4?\u003c\/strong\u003e Yes, Sierra 18-2743 cross-references directly to OEM number 19543A4, so it is a suitable replacement wherever that OEM gasket is called for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2743 also replace OEM number 27-94996-2?\u003c\/strong\u003e Yes, 27-94996-2 is also listed as an OEM cross-reference for the Sierra 18-2743 drive shaft housing to bell housing gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e The Sierra 18-2743 weighs 0.06 pounds, reflecting its thin, compact gasket construction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e One Sierra 18-2743 gasket is required per application at the drive shaft housing to bell housing joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2743?\u003c\/strong\u003e The UPC for the Sierra 18-2743 Drive Shaft Housing to Bell Housing Gasket is 030999775771.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould the gasket be reused after removing the drive shaft housing?\u003c\/strong\u003e No, gaskets like the 18-2743 are single-use seals; once the drive shaft housing or bell housing is separated, install a new 18-2743 rather than reusing the old gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is the 18-2743?\u003c\/strong\u003e Sierra 18-2743 falls under Mercruiser Bell Housing Gaskets, a category covering seals used at outdrive housing joints.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or a generic aftermarket gasket?\u003c\/strong\u003e The 18-2743 is a Sierra-branded gasket manufactured to fit in place of OEM numbers 19543A4 and 27-94996-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the outdrive does the 18-2743 install?\u003c\/strong\u003e It installs at the mating surface between the drive shaft housing and the bell housing on a Mercruiser outdrive.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109766875,"sku":"SIE-18-2743","price":8.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2743_lg__18589.1558123859.500.750.jpg?v=1785329145","url":"https:\/\/www.goodvibesmarina.com\/products\/mercruiser-outdrive-housing-mounting-gasket-replaces-27-94996a2-sierra-18-2743-mpn-118-2743","provider":"Good Vibes Marina","version":"1.0","type":"link"}