{"product_id":"sierra-18-2029-oil-seal-replaces-omc-321481-evinrude-johnson-outboard-prop-driveshaft-seal","title":"Sierra Oil Seal 18-2029, Replaces 321480, Evinrude Outboard Prop \u0026 Driveshaft Seal","description":"\u003cp\u003eThe Sierra 18-2029 is an oil seal built for Evinrude outboard prop and driveshaft seal applications. Its role is to keep water out and lubricant in around the driveshaft and propeller shaft area of the lower unit, protecting internal gearcase components from water intrusion and preventing lubricant loss that can lead to premature wear or corrosion. The seal has a machined exterior finish for a precise, consistent fit against the shaft and housing bore it seals against. It is manufactured in Taiwan and is compact, with product dimensions of 0.39 x 0.39 x 0.39 inches and a shipped weight of 0.02 pounds, so it ships and installs easily as a small, targeted repair part rather than a full assembly replacement. Because it is designed as a direct-fit replacement for the original equipment seal, it restores the sealing function of the lower unit without requiring modification to surrounding components. This seal is commonly kept on hand for scheduled lower unit service, gearcase rebuilds, or as part of a repair when water intrusion or lubricant leakage is diagnosed at the driveshaft or prop shaft seal location.\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 18-2029\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Prop \u0026amp; Driveshaft Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999309754\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 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\u003ePackage Dimensions:\u003c\/strong\u003e 5.13 inches L x 4.0 inches W x 1.25 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 321480\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThe Sierra 18-2029 is used in Evinrude outboard prop and driveshaft seal applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003e321480\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2029 oil seal fit?\u003c\/strong\u003e The Sierra 18-2029 is used in Evinrude outboard prop and driveshaft seal applications, sealing the driveshaft or propeller shaft area of the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2029 replace?\u003c\/strong\u003e It replaces OEM part number 321480, making it a direct cross-reference for that Evinrude seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this oil seal?\u003c\/strong\u003e The Sierra 18-2029 oil seal measures 0.39 x 0.39 x 0.39 inches as shipped in its individual product form.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2029 oil seal weigh?\u003c\/strong\u003e This oil seal weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-2029 manufactured?\u003c\/strong\u003e The Sierra 18-2029 oil seal is manufactured in Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2029 a genuine Evinrude part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-2029 is an aftermarket seal manufactured by Sierra as a cross-reference replacement for OEM number 321480, not an original Evinrude-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-2029 seal have?\u003c\/strong\u003e It has a machined exterior finish for a precise fit at the sealing surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-2029?\u003c\/strong\u003e Ordering Sierra 18-2029 gets you one oil seal for Evinrude outboard prop and driveshaft seal applications; it does not include gaskets or other lower unit hardware unless listed separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2029 stop water intrusion in the lower unit?\u003c\/strong\u003e Yes, as an oil seal for the driveshaft and prop shaft area, the 18-2029 is designed to keep water out of the gearcase and retain lubricant inside it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2029 oil seal?\u003c\/strong\u003e The UPC for the Sierra 18-2029 is 030999309754.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2029 a small or full-size replacement part?\u003c\/strong\u003e At 0.39 x 0.39 x 0.39 inches and 0.02 pounds, the 18-2029 is a small, single-component oil seal rather than a full lower unit assembly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090630363,"sku":"SIE-18-2029","price":13.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2029__01179.1722490668.500.750.jpg?v=1785188227","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2029-oil-seal-replaces-omc-321481-evinrude-johnson-outboard-prop-driveshaft-seal","provider":"Good Vibes Marina","version":"1.0","type":"link"}