{"product_id":"sierra-18-0891-9-water-pump-mounting-gasket-pack-of-2-replaces-volvo-penta-omc-3852477-and-chris-craft-16-50-00078","title":"Sierra 18-0891-9 Water Pump Mounting Gasket, Replaces 27-34897, GM 4.3L 5.0L 5.8L, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0891-9 Water Pump Mounting Gasket seals the water pump housing to the engine block on GM 4.3L, 5.0L, and 5.8L marine engines. Sold in a package of 2, this gasket is built to meet or exceed original equipment quality, giving a reliable, leak-free seal at the pump-to-block mating surface during routine water pump service, rebuilds, or replacement. Keeping a spare on hand is worthwhile since the gasket should always be replaced whenever the water pump is removed, rather than reused.\u003c\/p\u003e\u003cp\u003eThis mounting gasket is a direct cross-reference match for several OEM and aftermarket numbers, so it fits in place of the Mercruiser 27-34897, 27-34896, FI5000077, and FI5000078 gaskets used on the same GM-based engine platforms. Because it ships two to a package, one purchase covers both sides of a dual-pump job or provides a spare for the next service interval. As with any gasket, proper surface prep on the block and pump housing before installation helps ensure a tight, long-lasting seal.\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 18-0891-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Mounting Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e GM 4.3L, 5.0L \u0026amp; 5.8L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 27-34897, 27-34896, FI5000077, FI5000078\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM 4.3L, 5.0L \u0026amp; 5.8L engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-34897\u003c\/li\u003e\n\u003cli\u003e27-34896\u003c\/li\u003e\n\u003cli\u003eFI5000077\u003c\/li\u003e\n\u003cli\u003eFI5000078\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0891-9 water pump mounting gasket fit?\u003c\/strong\u003e The Sierra 18-0891-9 is designed for GM 4.3L, 5.0L, and 5.8L marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0891-9?\u003c\/strong\u003e Each package of the Sierra 18-0891-9 water pump mounting gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0891-9 gasket a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket replacement gasket, made to meet or exceed original equipment quality rather than being a Mercruiser-branded OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Mercruiser part numbers does the 18-0891-9 gasket cross-reference?\u003c\/strong\u003e It replaces Mercruiser 27-34897, 27-34896, FI5000077, and FI5000078.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace this gasket every time I service the water pump?\u003c\/strong\u003e Yes, a water pump mounting gasket like the Sierra 18-0891-9 should be replaced whenever the water pump is removed, since a used gasket will not reseal reliably.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0891-9?\u003c\/strong\u003e Ordering the Sierra 18-0891-9 gets you a package of 2 water pump mounting gaskets sized for GM 4.3L, 5.0L \u0026amp; 5.8L engines; no additional hardware is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0891-9 gasket weigh?\u003c\/strong\u003e The Sierra 18-0891-9 water pump mounting gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty applies to the Sierra 18-0891-9?\u003c\/strong\u003e The Sierra 18-0891-9 water pump mounting gasket carries a 90 day warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-0891-9 gasket on an engine other than GM 4.3L, 5.0L, or 5.8L?\u003c\/strong\u003e The 18-0891-9 is specified for GM 4.3L, 5.0L \u0026amp; 5.8L engines; fitment outside that range is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0891-9 come as a single gasket or a set?\u003c\/strong\u003e The 18-0891-9 is sold as a set, packaged 2 gaskets per unit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086337755,"sku":"SIE-18-0891-9","price":4.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0891-9__32156.1737886565.500.750.jpg?v=1785188055","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0891-9-water-pump-mounting-gasket-pack-of-2-replaces-volvo-penta-omc-3852477-and-chris-craft-16-50-00078","provider":"Good Vibes Marina","version":"1.0","type":"link"}