{"product_id":"sierra-18-0133-water-jacket-cover-gasket-for-mercury-outboards-replaces-oem-27-73665","title":"Sierra Water Jacket Gasket 18-0133, Replaces 27-73665 and 27-52892, for 4 Cylinder Outboards","description":"\u003cp\u003eThe Sierra Water Jacket Gasket, part number 18-0133, seals the water jacket cover on 4 cylinder outboard engines, forming the barrier between the cooling passages and the engine block to prevent coolant leaks and maintain proper cooling system pressure. Correct sealing at this joint is essential to preventing overheating and coolant loss, so this gasket is intended to be replaced any time the water jacket cover is removed for service rather than reused. It is manufactured to the dimensions and fit of the original equipment cover it mates to, measuring 0.39 x 0.39 x 0.39 inches and weighing 0.12 pounds, making it a compact, low-cost component that is easy to keep on hand as routine maintenance stock.\u003c\/p\u003e\u003cp\u003eThis gasket is sold individually (priced per piece). Buyers who need multiple units can order the package of 5 by requesting part number 18-0133-9 instead.\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 18-0133\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Jacket Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e 4 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.12 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\u003ePackaging:\u003c\/strong\u003e Sold individually; package of 5 available as 18-0133-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-73665, 27-52892\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999754950\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e4 Cylinder outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-73665\u003c\/li\u003e\n\u003cli\u003e27-52892\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0133 gasket fit?\u003c\/strong\u003e The 18-0133 water jacket gasket is designed for 4 cylinder outboard engines, sealing the water jacket cover against the engine block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0133 a direct replacement for OEM gaskets?\u003c\/strong\u003e Yes, part 18-0133 replaces OEM gaskets 27-73665 and 27-52892, so either original number can be used to confirm this is the correct part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-0133 water jacket gasket?\u003c\/strong\u003e This gasket measures 0.39 x 0.39 x 0.39 inches, a compact size consistent with a water jacket cover seal on a 4 cylinder outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0133 gasket weigh?\u003c\/strong\u003e The Sierra 18-0133 water jacket gasket weighs 0.12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy the 18-0133 gasket in a multi-pack?\u003c\/strong\u003e The base part 18-0133 is sold individually (priced per piece); for a package of 5, order part number 18-0133-9 instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould the water jacket gasket be reused after removing the cover?\u003c\/strong\u003e No, a water jacket gasket like the 18-0133 should be replaced with a new one any time the water jacket cover is removed, since a reused gasket is prone to leaking.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if the water jacket gasket fails?\u003c\/strong\u003e A failed water jacket gasket, such as an old or damaged 18-0133, can allow coolant to leak from the water jacket cover joint, leading to reduced cooling efficiency or overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra 18-0133 cross-reference to more than one OEM number?\u003c\/strong\u003e Yes, 18-0133 corresponds to two OEM numbers, 27-73665 and 27-52892, both of which it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0133 gasket genuine Sierra or aftermarket equivalent?\u003c\/strong\u003e The 18-0133 is a Sierra brand part manufactured as a direct-fit replacement for the listed OEM numbers on 4 cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-0133?\u003c\/strong\u003e An order of 18-0133 includes one water jacket gasket; if the package quantity of 5 is needed, request part 18-0133-9 instead.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988023193819,"sku":"SIE-18-0133","price":5.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0133_lg__43565.1558119003.500.750.jpg?v=1785189212","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0133-water-jacket-cover-gasket-for-mercury-outboards-replaces-oem-27-73665","provider":"Good Vibes Marina","version":"1.0","type":"link"}