{"product_id":"sierra-18-2049-upper-drive-shaft-housing-oil-seal-replaces-mercury-26-32511-2-005-in-od","title":"Sierra 18-2049 Oil Seal, Replaces Mercury Marine 26-32511, Fits Stern Drive Models 485, 888, 898\/228","description":"\u003cp\u003eThe Sierra 18-2049 Oil Seal is a white oil seal built as a direct equivalent to the Mercury Marine 26-32511 seal used in stern drive gear case assemblies. It measures 2.005 inches in outer diameter, fits a 1.250 inch shaft, and has a width of 0.388 inches, making it a precise fit for the applications it is designed to replace.\u003c\/p\u003e\u003cp\u003eThis seal is used in the gear case oil seal position (listed as position code GC in the parts breakdown) on stern drive units. It is designed to keep gear lubricant contained around the rotating shaft while keeping water out of the gear case, protecting internal gears and bearings from water intrusion and lubricant loss. Replacing a worn or hardened oil seal at this position is a routine maintenance step whenever a stern drive gear case is opened for service, or when gear lube is found to be milky or contaminated with water.\u003c\/p\u003e\u003cp\u003eThe Sierra 18-2049 is confirmed for use on stern drive models identified as 485, 888, and 898\/228, each tied to specific serial number ranges. Always confirm your unit's serial number falls within the applicable range before 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 18-2049\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 2.005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Size:\u003c\/strong\u003e 1.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.388 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Shape:\u003c\/strong\u003e Rectangular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.07 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 26-32511\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257682\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStern drive model 485, serial number 4893835 and up\u003c\/li\u003e\n\u003cli\u003eStern drive model 888, serial number 3106717 and up\u003c\/li\u003e\n\u003cli\u003eStern drive model 898\/228, serial number 4782330 to 6225576\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 26-32511\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2049 oil seal replace?\u003c\/strong\u003e The Sierra 18-2049 is a direct equivalent to Mercury Marine part number 26-32511, so it can be used wherever that OEM number is called for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this oil seal?\u003c\/strong\u003e The 18-2049 has an outer diameter of 2.005 inches, a shaft size of 1.250 inches, and a width of 0.388 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich stern drive models is the 18-2049 designed for?\u003c\/strong\u003e This seal is listed for stern drive models 485 (serial number 4893835 and up), 888 (serial number 3106717 and up), and 898\/228 (serial number 4782330 to 6225576).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my unit falls in the correct serial number range?\u003c\/strong\u003e Check the serial number tag on your stern drive unit against the ranges listed for the 18-2049: 4893835-and-up for model 485, 3106717-and-up for model 888, or 4782330 to 6225576 for model 898\/228.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or a generic aftermarket seal?\u003c\/strong\u003e The 18-2049 is a Sierra branded oil seal, manufactured as a direct replacement for the Mercury Marine 26-32511 rather than a generic universal seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2049 seal?\u003c\/strong\u003e This oil seal is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat position does this seal install in on the gear case?\u003c\/strong\u003e Within the stern drive parts breakdown, the 18-2049 is listed at the gear case oil seal position (position code GC).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-2049 myself?\u003c\/strong\u003e Replacing the 18-2049 gear case oil seal is typically done whenever the stern drive gear case housing is opened for service, and it should be seated to the correct depth to seal properly around the 1.250 inch shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2049 come with any additional hardware or seals?\u003c\/strong\u003e The 18-2049 is supplied as a single oil seal only; it does not include other gear case seals such as the 18-2056 or 18-2003 sometimes used in the same assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2049 weigh?\u003c\/strong\u003e The 18-2049 oil seal weighs 0.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace this seal?\u003c\/strong\u003e A worn or hardened 18-2049 oil seal can allow water into the gear case or let gear lubricant escape, so it is commonly replaced if lubricant appears milky or the seal shows visible wear.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091351259,"sku":"SIE-18-2049","price":17.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2049__77604.1722372549.500.750.jpg?v=1785188167","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2049-upper-drive-shaft-housing-oil-seal-replaces-mercury-26-32511-2-005-in-od","provider":"Good Vibes Marina","version":"1.0","type":"link"}