{"product_id":"water-cover-gasket-for-johnson-evinrude-20-35-hp-outboards-replaces-oem-327674-sierra-18-3899","title":"Sierra 18-3899 Water Cover Gasket for Johnson\/Evinrude 20, 25, 25C, 30, 35 HP Outboards","description":"\u003cp\u003eThe Sierra 18-3899 Water Cover Gasket is a round gasket engineered to seal the water cover on Johnson\/Evinrude outboard motors rated 20, 25, 25C, 30, and 35 HP. It creates a reliable seal between the water cover and powerhead, helping maintain proper cooling system integrity and preventing water intrusion or leaks at the cover joint. As a Sierra Marine product, it is built to meet or exceed the specifications of the original equipment part it replaces, giving boat owners a dependable option when servicing the outboard's cooling passages during a rebuild or routine maintenance.\u003c\/p\u003e\u003cp\u003eThis is a single-piece gasket (one gasket per package) intended for direct fitment on the applicable Johnson\/Evinrude horsepower range. Sierra supplies OEM engine manufacturers and boat builders with quality parts daily, and every Sierra part is backed by Sierra's customer satisfaction warranty.\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 18-3899\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Cover Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282244118\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboards: 20, 25, 25C, 30, 35 HP\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3899 gasket used for?\u003c\/strong\u003e The Sierra 18-3899 is a water cover gasket that seals the water cover on Johnson\/Evinrude outboard motors, helping maintain a proper seal in the cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard motors does the 18-3899 gasket fit?\u003c\/strong\u003e It fits Johnson\/Evinrude outboards rated 20, 25, 25C, 30, and 35 HP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e Each package of part number 18-3899 contains one water cover gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-3899 water cover gasket?\u003c\/strong\u003e The gasket is round in shape, matching the water cover it is designed to seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3899 gasket weigh?\u003c\/strong\u003e The Sierra 18-3899 water cover gasket weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3899 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra aftermarket part engineered to meet or exceed the specifications of the original equipment water cover gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3899 gasket come with a warranty?\u003c\/strong\u003e Yes, the 18-3899 is covered under Sierra's customer satisfaction warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this water cover gasket?\u003c\/strong\u003e This gasket should be replaced any time the water cover is removed for service or if the existing gasket shows signs of leaking or deterioration on a Johnson\/Evinrude 20-35 HP outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3899 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-3899 water cover gasket is 808282244118.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3899 gasket compatible with the 25C model specifically?\u003c\/strong\u003e Yes, the 25C horsepower variant is included in the listed fitment for the Sierra 18-3899 water cover gasket, along with the 20, 25, 30, and 35 HP models.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988169928923,"sku":"SIE-18-3899","price":8.13,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3899_lg__55307.1558127584.500.750.jpg?v=1785188650","url":"https:\/\/www.goodvibesmarina.com\/products\/water-cover-gasket-for-johnson-evinrude-20-35-hp-outboards-replaces-oem-327674-sierra-18-3899","provider":"Good Vibes Marina","version":"1.0","type":"link"}