{"product_id":"head-gasket-for-yamaha-outboard-replaces-oem-6g5-11181-a0-00-sierra-18-3894","title":"Sierra 18-3894 Head Gasket - Replaces Yamaha Outboard 6G5-11181-A0-00","description":"\u003cp\u003eThe Sierra 18-3894 Head Gasket is a direct-fit replacement head gasket engineered for Yamaha outboard engines. It seals the mating surface between the cylinder head and cylinder block, maintaining proper compression and preventing coolant or combustion leaks that can lead to overheating or power loss. Each Sierra 18-3894 is built to meet or exceed the specifications of the original equipment part it replaces, giving outboard owners a reliable option for engine rebuilds, head gasket replacement jobs, and routine maintenance.\u003c\/p\u003e\u003cp\u003eThis gasket corresponds to the Yamaha OEM number 6G5-11181-A0-00, so it is intended for use where that OEM head gasket is called for. It ships as a single gasket and is sized for a straightforward swap during a head gasket service, without modification to surrounding components.\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 18-3894\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Yamaha Outboard Head Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6G5-11181-A0-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282258962\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket per pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications that call for Yamaha outboard OEM head gasket 6G5-11181-A0-00.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6G5-11181-A0-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3894 head gasket fit?\u003c\/strong\u003e The Sierra 18-3894 head gasket is designed for Yamaha outboard applications that use the OEM head gasket numbered 6G5-11181-A0-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3894 the same as the Yamaha OEM head gasket?\u003c\/strong\u003e Yes, Sierra part 18-3894 is a direct cross-reference to Yamaha OEM head gasket 6G5-11181-A0-00 and is built to meet or exceed the original equipment specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3894 head gasket weigh?\u003c\/strong\u003e The Sierra 18-3894 head gasket weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the package?\u003c\/strong\u003e The Sierra 18-3894 ships as a single head gasket, one gasket per pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-3894 a genuine OEM part or an aftermarket part?\u003c\/strong\u003e It is a Sierra aftermarket replacement gasket manufactured to meet or exceed the quality of the original equipment part it replaces, not a Yamaha-branded OEM piece.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3894 head gasket?\u003c\/strong\u003e The UPC for the Sierra 18-3894 head gasket is 808282258962.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this head gasket?\u003c\/strong\u003e A head gasket like the Sierra 18-3894 typically needs replacement when an outboard shows signs of a blown gasket, such as coolant loss, overheating, or a loss of cylinder compression, or as part of a planned head gasket service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3894 gasket require any modification to install?\u003c\/strong\u003e No, the Sierra 18-3894 is manufactured as a direct-fit replacement for the Yamaha OEM 6G5-11181-A0-00 head gasket and installs in place of the original without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the manufacturer part number for this gasket?\u003c\/strong\u003e The manufacturer part number is 18-3894, sold under the Sierra brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this gasket on any Yamaha outboard?\u003c\/strong\u003e The Sierra 18-3894 is intended for Yamaha outboard engines that specify the OEM head gasket 6G5-11181-A0-00; confirm your engine calls for that OEM number before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988169437403,"sku":"SIE-18-3894","price":43.1,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3894_lg__95533.1558127185.500.750.jpg?v=1785188270","url":"https:\/\/www.goodvibesmarina.com\/products\/head-gasket-for-yamaha-outboard-replaces-oem-6g5-11181-a0-00-sierra-18-3894","provider":"Good Vibes Marina","version":"1.0","type":"link"}