{"product_id":"sierra-18-0879-adapter-plate-gasket-for-mercury-outboards-replaces-oem-27-38501-1","title":"Sierra 18-0879 Adapter Plate Gasket, Replaces Mercury 27-30501-1","description":"\u003cp\u003eThe Sierra 18-0879 Adapter Plate Gasket is a replacement gasket engineered to meet or exceed original equipment quality for Mercury outboard applications. It seals the adapter plate to prevent leaks and maintain proper compression at the mating surface, restoring a tight seal when the original gasket has hardened, torn, or lost its seal after removal for service. As a direct cross-reference to Mercury part number 27-30501-1, it is sized and shaped to install as a drop-in replacement without modification.\u003c\/p\u003e\u003cp\u003eThis gasket is a single-use component, meaning a new one should be installed any time the adapter plate is removed for maintenance or repair, since reusing a compressed gasket can result in leaks. It ships as a single gasket and is intended for buyers who already know they need this specific Sierra part number or its Mercury OEM equivalent.\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 18-0879\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Adapter Plate Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity per Application:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.07 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999751621\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00030999751621\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-30501-1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications specified by Mercury OEM part number 27-30501-1.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-30501-1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0879 Adapter Plate Gasket fit?\u003c\/strong\u003e The Sierra 18-0879 Adapter Plate Gasket is designed as a replacement for Mercury OEM part number 27-30501-1, so it fits the same adapter plate applications that number covers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0879 the same as Mercury 27-30501-1?\u003c\/strong\u003e Yes, Sierra part number 18-0879 is the direct cross-reference to Mercury OEM number 27-30501-1, made to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e One Sierra 18-0879 Adapter Plate Gasket ships per package, matching the quantity of one used per adapter plate application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0879 gasket weigh?\u003c\/strong\u003e The Sierra 18-0879 Adapter Plate Gasket weighs 0.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the adapter plate gasket be reused after removal?\u003c\/strong\u003e No, a gasket like the Sierra 18-0879 should be replaced with a new one any time the adapter plate is removed, since a used gasket has already been compressed and may no longer seal properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-0879 is a Sierra-branded gasket built to meet or exceed the quality of the original equipment part it replaces, identified by the OEM cross-reference 27-30501-1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of product is the 18-0879 gasket used in?\u003c\/strong\u003e Sierra 18-0879 is listed under Mercury Outboard Gaskets, used to seal the adapter plate on applicable Mercury outboard components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0879 gasket require any modification to install?\u003c\/strong\u003e No, the Sierra 18-0879 Adapter Plate Gasket is made as a direct replacement for Mercury 27-30501-1 and installs in place of the original without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-0879 gasket?\u003c\/strong\u003e Ordering the Sierra 18-0879 includes one Adapter Plate Gasket only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the adapter plate gasket?\u003c\/strong\u003e An adapter plate gasket like the Sierra 18-0879 typically needs replacement after the plate is removed for service, or if the original gasket has failed and is allowing a leak at the adapter plate seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086108379,"sku":"SIE-18-0879","price":7.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0879_lg__38733.1558120552.500.750.jpg?v=1785188650","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0879-adapter-plate-gasket-for-mercury-outboards-replaces-oem-27-38501-1","provider":"Good Vibes Marina","version":"1.0","type":"link"}