{"product_id":"sierra-18-2956-water-jacket-head-gasket-for-johnson-evinrude-outboards-replaces-oem-318358","title":"Sierra 18-2956 Water Jacket Head Gasket for Johnson\/Evinrude Outboard Motors, Replaces 0339620","description":"\u003cp\u003eThe Sierra 18-2956 is a water jacket head gasket engineered for Johnson and Evinrude outboard motor applications. It seals the cylinder head against the engine block, maintaining proper compression and directing coolant flow through the water jacket passages to keep the powerhead running at the correct operating temperature. Each package contains one gasket, sized and cut to seat correctly against the mating surfaces of the applicable Johnson\/Evinrude powerhead.\u003c\/p\u003e\u003cp\u003eThis gasket is manufactured to meet or exceed the performance of the original equipment part it replaces, making it a reliable choice for a head gasket replacement during a powerhead rebuild or routine maintenance. It is finished in white and is a direct fit for the Johnson\/Evinrude applications it is designed for.\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 18-2956\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Jacket Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude outboard motors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 gasket per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999314550\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eJohnson and Evinrude outboard motor applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e0339620\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2956 head gasket fit?\u003c\/strong\u003e The Sierra 18-2956 is designed for Johnson and Evinrude outboard motor applications, where it serves as the water jacket head gasket between the cylinder head and engine block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2956 replace?\u003c\/strong\u003e The Sierra 18-2956 water jacket head gasket replaces OEM number 0339620.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e Each package of the Sierra 18-2956 contains one water jacket head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2956 gasket?\u003c\/strong\u003e It is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2956 head gasket weigh?\u003c\/strong\u003e The Sierra 18-2956 weighs 0.12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2956 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-2956 is a Sierra-manufactured replacement gasket built to meet or exceed the performance of the original equipment water jacket head gasket it replaces, rather than a part sourced directly from Johnson or Evinrude.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this gasket used for during installation?\u003c\/strong\u003e The 18-2956 seals the mating surface between the cylinder head and engine block on applicable Johnson\/Evinrude outboards, maintaining compression and proper coolant flow through the water jacket during a head gasket or powerhead rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2956 include installation hardware or bolts?\u003c\/strong\u003e No, the package includes only the water jacket head gasket itself; no bolts or additional hardware are included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-2956 on any Johnson or Evinrude outboard?\u003c\/strong\u003e The 18-2956 is designed specifically for Johnson and Evinrude outboard motor applications; confirm the OEM number 0339620 against your engine's original gasket before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2956?\u003c\/strong\u003e The UPC for the Sierra 18-2956 head gasket is 030999314550.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988135489755,"sku":"SIE-18-2956","price":18.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2956_lg__87878.1558125094.500.750.jpg?v=1785188101","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2956-water-jacket-head-gasket-for-johnson-evinrude-outboards-replaces-oem-318358","provider":"Good Vibes Marina","version":"1.0","type":"link"}