{"product_id":"sierra-18-0386-water-pump-body-gasket-for-mercruiser-replaces-oem-27-94914","title":"Sierra 18-0386 Water Pump Body Gasket - Replaces 27-94914, 27-72780","description":"\u003cp\u003eThe Sierra 18-0386 Water Pump Body Gasket seals the mating surface between the water pump body and the housing on applicable Mercruiser sterndrive engines, preventing raw water leakage at this joint during operation. It is manufactured to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing or rebuilding a water pump assembly. This is a single gasket, sold individually, designed for a precise fit against the original mounting pattern so it seats correctly without additional trimming or modification.\u003c\/p\u003e\u003cp\u003eThis gasket is commonly replaced any time the water pump body is removed for service, such as during an impeller replacement, water pump rebuild, or when addressing a coolant or raw water leak at the pump housing. Installing a new gasket rather than reusing the old one helps ensure a proper seal and reduces the risk of leaks after reassembly. The part is identified by Sierra part number 18-0386 and directly corresponds to the OEM Mercruiser numbers listed below, so it can be cross-referenced against those part numbers when ordering.\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 18-0386\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Pump Body Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 gasket per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999873675\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Water Pumps and Impellers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercruiser sterndrive water pump assemblies that use OEM gasket 27-94914 or 27-72780.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-94914\u003c\/li\u003e\n\u003cli\u003e27-72780\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0386 Water Pump Body Gasket fit?\u003c\/strong\u003e The Sierra 18-0386 is designed for Mercruiser sterndrive water pump assemblies that use OEM gasket numbers 27-94914 or 27-72780, sealing the water pump body to its housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0386 gasket the same as Mercruiser 27-94914?\u003c\/strong\u003e Yes, Sierra part 18-0386 directly replaces Mercruiser OEM gasket 27-94914, along with 27-72780, and is built to meet or exceed the original equipment specification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of the 18-0386?\u003c\/strong\u003e The Sierra 18-0386 Water Pump Body Gasket is sold as a single gasket per package, intended for one water pump body installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0386 gasket weigh?\u003c\/strong\u003e This gasket weighs 0.01 pounds, consistent with its use as a thin sealing component rather than a structural part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the water pump body gasket?\u003c\/strong\u003e Replace the 18-0386 gasket any time the water pump body is removed, such as during impeller service or a water pump rebuild, to ensure a proper seal against leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0386 an OEM part or aftermarket?\u003c\/strong\u003e The 18-0386 is a Sierra-manufactured aftermarket gasket engineered to meet or exceed the quality of the original Mercruiser equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse the old water pump gasket instead of installing a new one?\u003c\/strong\u003e Reusing an old gasket is not recommended; installing a new Sierra 18-0386 gasket during water pump service helps ensure a reliable seal and reduces the chance of leaks after reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0386 gasket require any trimming to fit?\u003c\/strong\u003e No, the Sierra 18-0386 Water Pump Body Gasket is manufactured to match the original mounting pattern, so it seats correctly without trimming or modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers cross-reference to the Sierra 18-0386?\u003c\/strong\u003e The Sierra 18-0386 gasket cross-references to Mercruiser OEM numbers 27-94914 and 27-72780.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0386?\u003c\/strong\u003e Ordering the Sierra 18-0386 includes one water pump body gasket, sold individually rather than as part of a kit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988072804571,"sku":"SIE-18-0386","price":2.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0386_lg__66528.1558120113.500.750.jpg?v=1785188700","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0386-water-pump-body-gasket-for-mercruiser-replaces-oem-27-94914","provider":"Good Vibes Marina","version":"1.0","type":"link"}