{"product_id":"sierra-18-2544-9-water-jacket-cover-gasket-2-pack-replaces-omc-315538-fits-evinrude-johnson-50-55-hp-outboards","title":"Sierra Water Jacket Gasket 18-2544-9, Replaces 321028, Fits Evinrude 50\/55 HP Outboards, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2544-9 is a water jacket gasket sold as a pack of two, engineered to seal the water jacket cover on Evinrude 50\/55 HP outboards. It is built to Sierra's quality standard using materials selected for consistent sealing performance and long service life in the marine cooling system. This gasket sits between the water jacket cover and the powerhead, maintaining a tight seal around the cooling passages so the engine's raw water circuit stays leak-free and the powerhead cools properly during operation.\u003c\/p\u003e\u003cp\u003eBecause it ships two to a pack, the 18-2544-9 covers a complete gasket replacement in one purchase, which is useful when servicing both sides of the water jacket or keeping a spare on hand for the next service interval. It directly replaces OEM part number 321028, so it installs as a drop-in equivalent during routine maintenance, cooling system service, or when troubleshooting an overheating or leaking outboard.\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 18-2544-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Jacket Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Evinrude 50\/55 HP outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 321028\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.41 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Other\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 54.864 cm x 17.018 cm x 0.762 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162795\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEvinrude 50\/55 HP outboards\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e321028\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2544-9 water jacket gasket fit?\u003c\/strong\u003e The 18-2544-9 is designed to fit Evinrude 50\/55 HP outboards, sealing the water jacket cover on the powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2544-9 the same as OEM part 321028?\u003c\/strong\u003e Yes, Sierra part 18-2544-9 replaces OEM number 321028 and serves as a direct equivalent for that gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack of the 18-2544-9?\u003c\/strong\u003e Two gaskets are included per pack, priced and sold as a single 2-pack unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2544-9 gasket pack weigh?\u003c\/strong\u003e The pack weighs 0.41 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-2544-9 gasket made of?\u003c\/strong\u003e Sierra lists the material for the 18-2544-9 water jacket gasket as Other, a composite gasket material suited to sealing cooling system components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this water jacket gasket?\u003c\/strong\u003e Replacement is typically needed when servicing the water jacket cover, addressing a coolant leak, or performing routine maintenance on the cooling passages of a 50\/55 HP Evinrude outboard, where the 18-2544-9 seals the cover to the powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2544-9 include installation hardware?\u003c\/strong\u003e No, the package includes only the two water jacket gaskets; it does not include mounting bolts or additional hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use one 18-2544-9 pack for a full water jacket service?\u003c\/strong\u003e Since the pack contains two gaskets, one 18-2544-9 pack is enough to cover a standard water jacket cover replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2544-9 an OEM or aftermarket part?\u003c\/strong\u003e The 18-2544-9 is a Sierra aftermarket gasket manufactured to replace OEM number 321028 on applicable Evinrude 50\/55 HP outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine application is the 18-2544-9 gasket designed for?\u003c\/strong\u003e It is designed for Evinrude 50\/55 HP outboard engines, specifically sealing the water jacket cover in the cooling system.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107112667,"sku":"SIE-18-2544-9","price":13.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2544-9__94194.1737860880.500.750.jpg?v=1785188436","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2544-9-water-jacket-cover-gasket-2-pack-replaces-omc-315538-fits-evinrude-johnson-50-55-hp-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}