{"product_id":"oil-seal-26-48443-for-mercruiser-stern-drive-sierra-18-0526-0-750-id-x-1-379-od-x-0-256","title":"Sierra Oil Seal 18-0526 - OEM 26-48443 for Mercruiser Stern Drive, 0.750 Inch Shaft","description":"\u003cp\u003eThe Sierra 18-0526 is an oil seal engineered for Mercruiser stern drive applications, replacing OEM number 26-48443. It is built to contain gear lubricant and keep water and contaminants out of the drive housing, protecting internal gears and bearings from premature wear. The seal measures 0.750 inches at the shaft, 1.379 inches on the outer diameter, and 0.256 inches in width, and is finished in black. Sierra constructs this seal using quality materials selected for exceptional life and performance in the marine environment, where seals are constantly exposed to water, salt, and lubricant. Each unit ships as a single oil seal, ready to install as a direct replacement during drive service or seal maintenance. Because stern drive seals are a wear item that hardens and loses sealing ability over time, replacing the 18-0526 at the proper interval helps prevent lubricant leaks and water intrusion that can lead to more costly drive repairs.\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 18-0526\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Size:\u003c\/strong\u003e 0.750 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 1.379 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.256 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 oil seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999874375\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser stern drive\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-48443\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0526 oil seal replace?\u003c\/strong\u003e It is a direct replacement for OEM number 26-48443 used on Mercruiser stern drive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shaft size is the 18-0526 seal designed for?\u003c\/strong\u003e This seal has a 0.750 inch shaft size, with a 1.379 inch outer diameter and a 0.256 inch width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-0526 oil seal?\u003c\/strong\u003e It is finished in black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0526 oil seal weigh?\u003c\/strong\u003e The seal weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in one order?\u003c\/strong\u003e One order includes a single 18-0526 oil seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-0526 oil seal used for?\u003c\/strong\u003e It seals the Mercruiser stern drive housing, keeping gear lubricant in and water and debris out.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0526 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket Sierra part manufactured as a replacement for OEM number 26-48443, not an OEM Mercruiser part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should a stern drive oil seal like the 18-0526 be replaced?\u003c\/strong\u003e A seal in this position should be replaced when it hardens, leaks lubricant, or allows water intrusion into the drive housing, or as part of routine drive service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-0526 oil seal?\u003c\/strong\u003e The UPC for this oil seal is 030999874375.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0526 seal come with installation hardware?\u003c\/strong\u003e No, the package includes only the oil seal itself; no additional hardware is included.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988077031643,"sku":"SIE-18-0526","price":14.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0526_lg__95684.1558119055.500.750.jpg?v=1785188305","url":"https:\/\/www.goodvibesmarina.com\/products\/oil-seal-26-48443-for-mercruiser-stern-drive-sierra-18-0526-0-750-id-x-1-379-od-x-0-256","provider":"Good Vibes Marina","version":"1.0","type":"link"}