{"product_id":"head-gasket-for-yamaha-outboard-replaces-oem-6l2-11181-a1-00-sierra-18-3847","title":"Sierra Head Gasket 18-3847, Replaces 6L2-11181-A1-00 for Yamaha Outboard Engines","description":"\u003cp\u003eThe Sierra 18-3847 is a head gasket engineered as a direct replacement for Yamaha outboard engines. It seals the cylinder head-to-block joint, maintaining proper compression and preventing coolant or combustion leaks between the head and the powerhead. Each unit is supplied as a single head gasket (quantity of 1) and is manufactured to match the original equipment specification identified by Yamaha part number 6L2-11181-A1-00.\u003c\/p\u003e\u003cp\u003eThis head gasket is designed for outboard owners and marine technicians performing a cylinder head removal, powerhead rebuild, or routine maintenance where the head gasket must be replaced to restore a proper seal. Installing a correctly specified head gasket such as the Sierra 18-3847 helps ensure consistent cylinder sealing and compression across the powerhead.\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 18-3847\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Yamaha Outboard Head Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 6L2-11181-A1-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eYamaha outboard engines.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6L2-W0001-01-00\u003c\/li\u003e\n\u003cli\u003e6L2-W0001-02-00\u003c\/li\u003e\n\u003cli\u003e6L2-W0001-A2-00\u003c\/li\u003e\n\u003cli\u003e6L2-11181-A1-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3847?\u003c\/strong\u003e It is a head gasket, sold as Sierra part number 18-3847, designed to seal the cylinder head-to-block joint on Yamaha outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Yamaha OEM part numbers does the 18-3847 replace?\u003c\/strong\u003e The Sierra 18-3847 replaces Yamaha OEM numbers 6L2-W0001-01-00, 6L2-W0001-02-00, 6L2-W0001-A2-00, and 6L2-11181-A1-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one 18-3847 package?\u003c\/strong\u003e Each Sierra 18-3847 package contains a quantity of 1 head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the 18-3847 head gasket weigh?\u003c\/strong\u003e The Sierra 18-3847 head gasket weighs 0.13 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3847 a genuine Yamaha part or an aftermarket replacement?\u003c\/strong\u003e The 18-3847 is a Sierra-branded aftermarket head gasket manufactured to replace the Yamaha OEM head gasket 6L2-11181-A1-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-3847 head gasket fit?\u003c\/strong\u003e The Sierra 18-3847 is listed for Yamaha outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the 18-3847 head gasket?\u003c\/strong\u003e This head gasket should be replaced any time the cylinder head is removed for service, or if there is a compression or coolant leak at the head-to-block joint, on the applicable Yamaha outboard engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3847 come with installation instructions or additional gaskets?\u003c\/strong\u003e The Sierra 18-3847 package includes only the head gasket itself, in a quantity of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3847 head gasket round or a specific shape?\u003c\/strong\u003e The Sierra 18-3847 head gasket is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I cross-reference the 18-3847 by its Yamaha OEM number?\u003c\/strong\u003e Yes, the Sierra 18-3847 cross-references to Yamaha OEM numbers 6L2-W0001-01-00, 6L2-W0001-02-00, 6L2-W0001-A2-00, and 6L2-11181-A1-00.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988166160603,"sku":"SIE-18-3847","price":28.44,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3847_lg__32295.1558127496.500.750.jpg?v=1785189053","url":"https:\/\/www.goodvibesmarina.com\/products\/head-gasket-for-yamaha-outboard-replaces-oem-6l2-11181-a1-00-sierra-18-3847","provider":"Good Vibes Marina","version":"1.0","type":"link"}