{"product_id":"sierra-18-2857-9-air-silencer-gasket-pack-of-2-for-johnson-evinrude-outboards-replaces-386573-319771","title":"Sierra 18-2857-9 Air Silencer Gasket, Replaces 319771 386573, Johnson\/Evinrude Outboard, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2857-9 Air Silencer Gasket seals the air silencer housing on Johnson\/Evinrude outboard engines, preventing unmetered air leaks that can upset the carburetor's air\/fuel mixture and cause rough running or hard starting. Each package contains 2 gaskets, so buyers replacing both sides of a housing or keeping a spare on hand get exactly what they need in one purchase.\u003c\/p\u003e\u003cp\u003eSierra builds this gasket to precise O.E. Fitment using materials selected for durability under engine heat and vibration, so it seats correctly against the mating surfaces and holds a consistent seal over time. Because it is a direct-fit replacement for the OEM numbers it replaces, installation follows the same steps as removing and reinstalling the factory gasket, with no modification needed. It is backed by Sierra's manufacturer warranty.\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 18-2857-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Air Silencer Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Other\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282163624\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Gasket Sets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e319771\u003c\/li\u003e\n\u003cli\u003e386573\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2857-9 Air Silencer Gasket fit?\u003c\/strong\u003e The 18-2857-9 is designed for Johnson\/Evinrude outboard engines, sealing the air silencer housing to the carburetor or air box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e Sierra part 18-2857-9 is sold as a pack of 2 gaskets, covering both sides of the air silencer housing in one purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this gasket replace?\u003c\/strong\u003e It replaces Johnson\/Evinrude OEM numbers 319771 and 386573.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2857-9 gasket genuine OEM or aftermarket?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket gasket engineered for precise O.E. Fitment, not a Johnson\/Evinrude branded original part, but it is built to match the original sealing surfaces and dimensions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the air silencer gasket made from?\u003c\/strong\u003e The 18-2857-9 gasket is made from a gasket-grade material listed as 'Other,' selected by Sierra for reliable sealing under engine heat and vibration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2857-9 gasket weigh?\u003c\/strong\u003e Each package of the Sierra 18-2857-9 Air Silencer Gasket weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of this gasket straightforward?\u003c\/strong\u003e Yes, the 18-2857-9 is a direct replacement for the factory air silencer gasket, so it installs in the same position without modification when removing and reassembling the air silencer housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket come with a warranty?\u003c\/strong\u003e The Sierra 18-2857-9 Air Silencer Gasket is backed by Sierra's manufacturer warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the air silencer gasket?\u003c\/strong\u003e The 18-2857-9 gasket is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill one package of 18-2857-9 be enough for a full air silencer rebuild?\u003c\/strong\u003e Each package contains 2 gaskets, which is typically enough for a complete air silencer housing seal, though buyers with multiple housings should order accordingly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988132212955,"sku":"SIE-18-2857-9","price":6.67,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sierra_lg_1255__59862.1558124433.500.750.jpg?v=1785188939","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2857-9-air-silencer-gasket-pack-of-2-for-johnson-evinrude-outboards-replaces-386573-319771","provider":"Good Vibes Marina","version":"1.0","type":"link"}