{"product_id":"sierra-18-0779-water-jacket-gasket-for-yamaha-outboards-replaces-oem-6g5-11193-a0-00","title":"Sierra 18-0779 Water Jacket Gasket for Yamaha Outboards - Replaces 6G5-11193-A0-00","description":"\u003cp\u003eThe Sierra 18-0779 Water Jacket Gasket is a replacement gasket engineered for Yamaha outboard engines, sealing the water jacket to maintain proper cooling system integrity. Manufactured to meet or exceed original equipment quality, this gasket is a direct interchange for Yamaha part number 6G5-11193-A0-00. Each engine application requires 2 of these gaskets to complete the water jacket seal properly, so buyers should order accordingly for a full repair. The gasket is finished in white and is sold as a single unit per package. Sierra manufactures its marine gaskets to original equipment tolerances, helping ensure a proper seal against coolant leaks and preventing overheating issues caused by a failed or degraded water jacket gasket. This part is intended for technicians and boat owners performing water jacket maintenance, cylinder head service, or general cooling system repair on compatible Yamaha outboard engines. Installing a quality replacement gasket like the 18-0779 helps restore proper sealing after disassembly for maintenance or repair work.\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 18-0779\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Jacket Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Required Per Engine:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6G5-11193-A0-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6G5-11193-A0-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0779 water jacket gasket fit?\u003c\/strong\u003e The Sierra 18-0779 is designed for Yamaha outboard engines, sealing the water jacket area of the powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-0779 replace?\u003c\/strong\u003e It is a direct interchange for Yamaha part number 6G5-11193-A0-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets do I need for one engine?\u003c\/strong\u003e Each engine application requires 2 of the 18-0779 gaskets, so plan to order enough to cover that quantity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0779 sold as a single gasket or a set?\u003c\/strong\u003e The 18-0779 is sold as a single water jacket gasket per package, not as part of a multi-piece kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-0779 gasket?\u003c\/strong\u003e This water jacket gasket is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0779 gasket weigh?\u003c\/strong\u003e The Sierra 18-0779 weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0779 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-0779 is a Sierra-manufactured replacement gasket built to meet or exceed the quality of the original Yamaha 6G5-11193-A0-00 equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the water jacket gasket on a Yamaha outboard?\u003c\/strong\u003e The 18-0779 water jacket gasket should be replaced any time the powerhead is disassembled for service or if the original gasket has failed and is causing a coolant leak or overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0779 come with installation instructions?\u003c\/strong\u003e The Sierra 18-0779 is a gasket component intended for installation by someone familiar with Yamaha outboard powerhead service; it does not include a separate instruction sheet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0779 be used on other engine brands besides Yamaha?\u003c\/strong\u003e The 18-0779 is designed specifically for Yamaha outboard engines using the 6G5-11193-A0-00 water jacket gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085682395,"sku":"SIE-18-0779","price":21.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0779_lg__94038.1558119789.500.750.jpg?v=1785188314","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0779-water-jacket-gasket-for-yamaha-outboards-replaces-oem-6g5-11193-a0-00","provider":"Good Vibes Marina","version":"1.0","type":"link"}