{"product_id":"sierra-18-3831-head-gasket-for-yamaha-60-70-hp-outboards-replaces-oem-6h3-11181-01-00","title":"Sierra 18-3831 Head Gasket for Yamaha 60 HP and 70 HP Outboards, Replaces 6H3-11181-01-00","description":"\u003cp\u003eThe Sierra 18-3831 Head Gasket is a replacement head gasket engineered for Yamaha outboard motors, sealing the cylinder head to the block to maintain proper compression and prevent leaks between the combustion chamber and cooling passages. It fits Yamaha 60 (2001-05), P60 (1991-99), C60 (1996-01), E60 (1995-00), C70 (2000-01), and 70 (1984-09) engines, making it a direct fit for owners servicing these specific Yamaha outboard model years. Each package includes one gasket, sized precisely to match the original equipment sealing surface for a proper seal on installation.\u003c\/p\u003e\u003cp\u003eThis gasket is built to meet or exceed the specifications of the original equipment part it replaces, giving boat owners and marine technicians a reliable option when rebuilding a powerhead or addressing a compression or coolant leak. It cross-references directly to several OEM and aftermarket part numbers, so it can be ordered as a straightforward equivalent to the factory Yamaha gasket during a head gasket replacement or top-end rebuild.\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 18-3831\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Yamaha Outboard Head Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999316820\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One gasket per package\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha 60 HP (2001-05)\u003c\/li\u003e\n\u003cli\u003eYamaha P60 HP (1991-99)\u003c\/li\u003e\n\u003cli\u003eYamaha C60 HP (1996-01)\u003c\/li\u003e\n\u003cli\u003eYamaha E60 HP (1995-00)\u003c\/li\u003e\n\u003cli\u003eYamaha C70 HP (2000-01)\u003c\/li\u003e\n\u003cli\u003eYamaha 70 HP (1984-09)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 34940\u003c\/li\u003e\n\u003cli\u003eMallory 9-63952\u003c\/li\u003e\n\u003cli\u003eYamaha 6H3-11181-00-00\u003c\/li\u003e\n\u003cli\u003eYamaha 6H3-11181-01-00\u003c\/li\u003e\n\u003cli\u003eYamaha 6H3-11181-A0-00\u003c\/li\u003e\n\u003cli\u003eYamaha 6H3-11181-A1-00\u003c\/li\u003e\n\u003cli\u003eYamaha 6H3-11181-A2-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-3831 head gasket fit?\u003c\/strong\u003e The Sierra 18-3831 fits Yamaha 60 HP (2001-05), P60 (1991-99), C60 (1996-01), E60 (1995-00), C70 (2000-01), and 70 (1984-09) outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this gasket replace?\u003c\/strong\u003e It replaces Yamaha 6H3-11181-00-00, 6H3-11181-01-00, 6H3-11181-A0-00, 6H3-11181-A1-00, and 6H3-11181-A2-00, and is also interchangeable with GLM 34940 and Mallory 9-63952.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e One Sierra 18-3831 head gasket is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3831 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket Sierra-brand head gasket built to meet or exceed the specifications of the original Yamaha equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this head gasket?\u003c\/strong\u003e The Sierra 18-3831 measures 0.39 x 0.39 x 0.39 inches and weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket work on a Yamaha P60 outboard?\u003c\/strong\u003e Yes, the Sierra 18-3831 is designed to fit the Yamaha P60 (1991-99) engine along with the 60, C60, E60, C70, and 70 models listed for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this head gasket?\u003c\/strong\u003e A head gasket like the Sierra 18-3831 typically needs replacement when a powerhead is rebuilt or when symptoms of a blown gasket appear, such as compression loss or coolant leaking into the cylinder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-3831 cross-reference to a Mallory part number?\u003c\/strong\u003e Yes, Mallory 9-63952 is a direct cross-reference to the Sierra 18-3831 head gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket compatible with the Yamaha 70 HP outboard?\u003c\/strong\u003e The Yamaha 70 (1984-09) outboard is one of the engines this Sierra 18-3831 head gasket is designed to fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3831 head gasket?\u003c\/strong\u003e The UPC for the Sierra 18-3831 head gasket is 030999316820.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988165931227,"sku":"SIE-18-3831","price":38.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3831_lg__99697.1558126770.500.750.jpg?v=1785188132","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3831-head-gasket-for-yamaha-60-70-hp-outboards-replaces-oem-6h3-11181-01-00","provider":"Good Vibes Marina","version":"1.0","type":"link"}