{"product_id":"sierra-18-0488-intake-manifold-gasket-set-replaces-mercury-27-807473a1-fits-mercruiser-350-mag-5-0l-5-7l-lx-gen-ii-1996-up","title":"Sierra 18-0488 Intake Gasket, Replaces Mercury Marine 27-807473A1","description":"\u003cp\u003eThe Sierra 18-0488 is a white intake gasket engineered as a direct equivalent for Mercury Marine engines that call for OEM number 27-807473A1. It seats between the intake manifold and engine block to seal against exhaust gas and coolant leakage at the intake mating surface, a common failure point as factory gaskets age and lose compression. The gasket is round in shape and manufactured to OEM specifications for fit and sealing performance, making it a straightforward like-for-like replacement during a manifold gasket job or general engine maintenance. At 0.33 pounds, it ships as a single-count gasket ready to install without modification. Because it is built to OEM dimensions and material specification, it installs the same way the original Mercury Marine gasket does, using the same fastener pattern and sealing surface, so no special tools or adapters are required beyond a standard gasket replacement procedure.\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 18-0488\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Intake Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.33 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282187255\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercury Marine engines originally fitted with intake gasket 27-807473A1.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-807473A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0488 intake gasket fit?\u003c\/strong\u003e The Sierra 18-0488 is built as a direct equivalent for Mercury Marine intake applications that originally used OEM gasket 27-807473A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0488 the same as Mercury Marine 27-807473A1?\u003c\/strong\u003e Yes, part number 18-0488 is manufactured to replace Mercury Marine OEM gasket 27-807473A1 directly, matching its fit and sealing function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is this gasket?\u003c\/strong\u003e The 18-0488 intake gasket is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the Sierra 18-0488 gasket?\u003c\/strong\u003e It is round in shape, matching the sealing surface it is designed to cover.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0488 intake gasket weigh?\u003c\/strong\u003e This gasket weighs 0.33 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-0488 gasket manufactured?\u003c\/strong\u003e The country of origin for the 18-0488 intake gasket is Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Mercury Marine part or an aftermarket replacement?\u003c\/strong\u003e The 18-0488 is a Sierra-branded aftermarket gasket engineered to OEM specifications as a replacement for Mercury Marine 27-807473A1, not a genuine Mercury Marine part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the package?\u003c\/strong\u003e The Sierra 18-0488 is sold as a single gasket, one unit per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-0488 gasket myself?\u003c\/strong\u003e Yes, since it matches the OEM fit and dimensions of 27-807473A1, it installs the same way as the original Mercury Marine gasket during a standard intake manifold service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0488 intake gasket?\u003c\/strong\u003e The UPC for the 18-0488 intake gasket is 808282187255.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988075360475,"sku":"SIE-18-0488","price":50.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0488_lg__65705.1558121335.500.750.jpg?v=1785187970","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0488-intake-manifold-gasket-set-replaces-mercury-27-807473a1-fits-mercruiser-350-mag-5-0l-5-7l-lx-gen-ii-1996-up","provider":"Good Vibes Marina","version":"1.0","type":"link"}