{"product_id":"sierra-18-2915-9-water-pump-gasket-pack-of-2-replaces-mercruiser-mercury-27-856091-fits-mercruiser-stern-drive-mercury-marine","title":"Sierra 18-2915-9 Water Pump Gasket, Replaces 27-856091, Mercruiser Stern Drive and Mercury Marine, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2915-9 Water Pump Gasket is a direct-fit replacement gasket engineered for Mercruiser stern drive and Mercury marine water pump applications. Each package contains two gaskets, giving boat owners enough material on hand to complete a full water pump service or keep a spare ready for the next maintenance interval. The gasket seals the water pump housing to prevent coolant and raw water leaks, helping the cooling system maintain proper pressure and flow to protect the engine from overheating.\u003c\/p\u003e\u003cp\u003eSierra manufactures this gasket to meet or exceed the specifications of the original equipment part it replaces, making it a reliable choice for routine water pump rebuilds and repairs. It is designed as a direct cross-reference to several Mercruiser and Mercury Marine OEM part numbers, so it fits into the same service procedures without modification. Because it ships as a pack of two, it is priced and packaged for a complete water pump gasket replacement job.\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 18-2915-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Thermostats \u0026amp; Gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser stern drive applications\u003c\/li\u003e\n\u003cli\u003eMercury marine applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-856091\u003c\/li\u003e\n\u003cli\u003e27-858524\u003c\/li\u003e\n\u003cli\u003e27-85609\u003c\/li\u003e\n\u003cli\u003e27-32434\u003c\/li\u003e\n\u003cli\u003e27-30604\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2915-9 Water Pump Gasket fit?\u003c\/strong\u003e The 18-2915-9 gasket is designed for use in Mercruiser stern drive and Mercury marine water pump applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e Each package of the 18-2915-9 includes two water pump gaskets, enough for a complete water pump gasket replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does the 18-2915-9 replace?\u003c\/strong\u003e It replaces OEM numbers 27-856091, 27-858524, 27-85609, 27-32434, and 27-30604.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2915-9 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket Sierra replacement gasket that Sierra manufactures to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2915-9 gasket weigh?\u003c\/strong\u003e The 18-2915-9 Water Pump Gasket, per package of two, weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gasket be used for a Mercury outboard water pump?\u003c\/strong\u003e The 18-2915-9 falls under Sierra's Mercury Outboard Thermostats \u0026amp; Gaskets category and is designed for Mercruiser stern drive and Mercury marine water pump applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2915-9 replace 27-32434?\u003c\/strong\u003e Yes, 27-32434 is one of the OEM part numbers that the Sierra 18-2915-9 gasket replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2915-9 gasket sold individually or as a pair?\u003c\/strong\u003e It is sold priced per package of two, not individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the correct part number to order for this gasket?\u003c\/strong\u003e The correct Sierra part number to order is 18-2915-9, the Water Pump Gasket packaged in a set of two.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the 18-2915-9 water pump gasket be replaced?\u003c\/strong\u003e This gasket should be replaced any time the water pump housing is removed for service, since reusing a worn gasket can lead to coolant or raw water leaks at the pump housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988133163227,"sku":"SIE-18-2915-9","price":4.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2915-9__22225.1724327919.500.750.jpg?v=1785188214","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2915-9-water-pump-gasket-pack-of-2-replaces-mercruiser-mercury-27-856091-fits-mercruiser-stern-drive-mercury-marine","provider":"Good Vibes Marina","version":"1.0","type":"link"}