{"product_id":"sierra-18-2032-oil-seal-replaces-omc-321788-evinrude-johnson-outboard-prop-shaft-driveshaft-seal","title":"Sierra Oil Seal 18-2032, Replaces OMC 321788, Evinrude Outboard Prop and Driveshaft Seal","description":"\u003cp\u003eThe Sierra 18-2032 is an oil seal built for Evinrude outboard prop and driveshaft applications. It seals the shaft bore against water intrusion and lubricant loss, protecting the gear case and driveshaft components from corrosion and premature wear. The seal has a machined exterior finish and is sized to a 1.000 inch outer diameter, a 0.500 inch shaft size, and a 0.188 inch width, making it a precise fit for the driveshaft bore it is designed to seal.\u003c\/p\u003e\u003cp\u003eThis is a small, low-cost wear part that is commonly replaced during gear case service, driveshaft seal replacement, or lower unit rebuilds. It is sold as a direct-fit replacement carrying the Sierra part number 18-2032 and cross-references to OMC part number 321788, so it can be ordered using either number.\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 18-2032\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Oil Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 1.000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Size:\u003c\/strong\u003e 0.500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.188 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999309785\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e OMC 321788\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEvinrude outboard prop and driveshaft applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e321788\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2032 oil seal fit?\u003c\/strong\u003e The 18-2032 is designed for Evinrude outboard prop and driveshaft applications, sealing the driveshaft bore in the gear case.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2032 a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a Sierra-branded oil seal, part number 18-2032, sold as a direct cross-reference replacement rather than an OMC-branded original.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does this seal replace?\u003c\/strong\u003e This seal cross-references to OMC part number 321788, so either number can be used to order the correct part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2032 oil seal?\u003c\/strong\u003e The seal measures 1.000 inch outer diameter, 0.500 inch shaft size, and 0.188 inch width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2032 oil seal weigh?\u003c\/strong\u003e It weighs 0.03 pounds, consistent with a small single-component seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the Sierra 18-2032 have?\u003c\/strong\u003e The seal has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-2032 as a direct replacement without modification?\u003c\/strong\u003e Yes, the 18-2032 is a direct-fit replacement for the Evinrude driveshaft bore it is designed for, using the OMC 321788 cross-reference.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2032 oil seal?\u003c\/strong\u003e The UPC for the Sierra 18-2032 oil seal is 030999309785.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2032 come as a single seal or a kit?\u003c\/strong\u003e It is sold as a single oil seal, part number 18-2032, quantity one per application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the 18-2032 oil seal typically installed?\u003c\/strong\u003e It is installed in the driveshaft bore of the gear case on applicable Evinrude outboard prop and driveshaft assemblies.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090663131,"sku":"SIE-18-2032","price":7.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2032__79847.1722507654.500.750.jpg?v=1785188160","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2032-oil-seal-replaces-omc-321788-evinrude-johnson-outboard-prop-shaft-driveshaft-seal","provider":"Good Vibes Marina","version":"1.0","type":"link"}