{"product_id":"sierra-18-7459-o-ring-for-mercury-6-hp-60-outboard-powerhead-marine-seal","title":"Sierra O-Ring 18-7459 for Mercury Outboard Powerhead, Replaces 20311, 25-20826","description":"\u003cp\u003eThe Sierra O-Ring 18-7459 is a powerhead seal designed for Mercury outboard applications, engineered to maintain a reliable seal at critical mating surfaces and prevent leaks that can lead to water intrusion, oil loss, or pressure loss within the powerhead. As a direct aftermarket replacement, it is manufactured to match the fit and function of the original equipment it replaces, giving boat owners and marine technicians a dependable option when servicing Mercury outboard powerheads. This O-ring cross-references Mercury Marine part numbers 20311 and 25-20826, so it can be ordered with confidence when either of those numbers appears on a parts diagram or in a service manual. It ships as a single unit (package quantity of one), sized for the specific application it serves rather than as a bulk assortment. Compact and lightweight at 0.01 pounds with overall dimensions of 0.39 x 0.39 x 0.39 inches, the 18-7459 O-ring is easy to keep on hand as part of a seal kit or standalone replacement stock for routine powerhead maintenance, gasket replacement jobs, or teardown and rebuild work. Because it is sold under the Sierra part number 18-7459, technicians can standardize on a single, consistently cataloged part number rather than searching multiple OEM cross-references each time a replacement is needed.\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 18-7459\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Powerhead Seals \u0026amp; O-Rings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 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\u003eUPC:\u003c\/strong\u003e 030999876300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 20311, 25-20826\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eIntended for Mercury outboard powerhead applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e20311\u003c\/li\u003e\n\u003cli\u003e25-20826\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7459 O-ring replace?\u003c\/strong\u003e The Sierra 18-7459 O-ring cross-references OEM Mercury Marine part numbers 20311 and 25-20826, making it a direct replacement for either of those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-7459 O-ring used for?\u003c\/strong\u003e This O-ring is used as a seal in Mercury outboard powerhead applications, part of Sierra's Mercury Outboard Powerhead Seals \u0026amp; O-Rings category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-7459 O-ring weigh?\u003c\/strong\u003e The Sierra 18-7459 O-ring weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-7459 O-ring?\u003c\/strong\u003e The 18-7459 O-ring measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many O-rings come in a package of Sierra 18-7459?\u003c\/strong\u003e Sierra part 18-7459 is packaged as a single O-ring, with a package quantity of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7459 an OEM or aftermarket part?\u003c\/strong\u003e The 18-7459 is a Sierra-brand aftermarket O-ring manufactured to replace OEM Mercury Marine numbers 20311 and 25-20826.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-7459 O-ring?\u003c\/strong\u003e The UPC for the Sierra 18-7459 O-ring is 030999876300.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7459 O-ring fit Mercury outboards specifically?\u003c\/strong\u003e Yes, the 18-7459 is categorized by Sierra for Mercury outboard powerhead applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use OEM number 25-20826 to find the correct replacement O-ring?\u003c\/strong\u003e Yes, part number 25-20826 cross-references directly to the Sierra 18-7459 O-ring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes part number 18-7459?\u003c\/strong\u003e Part number 18-7459 is manufactured by Sierra.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988384919771,"sku":"SIE-18-7459","price":3.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sierra_lg_2070__06136.1558131090.500.750.jpg?v=1785188821","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-7459-o-ring-for-mercury-6-hp-60-outboard-powerhead-marine-seal","provider":"Good Vibes Marina","version":"1.0","type":"link"}