{"product_id":"sierra-18-2073-oil-seal-replaces-omc-981268-evinrude-johnson-outboard-prop-driveshaft-seal-1-750-in-id","title":"Sierra Oil Seal 18-2073, Replaces OMC 981268, Evinrude Outboard Prop and Driveshaft Seal","description":"\u003cp\u003eThe Sierra 18-2073 is an oil seal engineered for Evinrude outboard prop and driveshaft applications. It is designed as a direct equivalent for OMC part number 981268, restoring a proper seal where the driveshaft or propeller shaft passes through the gearcase housing to keep gear lubricant in and water out. A compromised or worn seal in this location is a common cause of milky gear oil and water intrusion into the lower unit, so replacing this seal is a routine part of gearcase maintenance and rebuild work.\u003c\/p\u003e\u003cp\u003eThis seal measures 0.39 x 0.39 x 0.39 inches and weighs 0.07 pounds, with a machined exterior finish for a precise fit against the housing bore and shaft. Because oil seals are wear items exposed to constant shaft rotation, heat, and lubricant contact, they should be replaced any time a gearcase is opened up for service rather than reused. This part is sold individually; some gearcase applications call for multiple units of this seal, so confirm the quantity needed for your specific rebuild 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 18-2073\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Oil Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Prop \u0026amp; Driveshaft Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.07 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 030999310248\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 981268\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUsed in Evinrude outboard prop and driveshaft assemblies that call for OEM seal 981268.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e981268\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2073 oil seal replace?\u003c\/strong\u003e It replaces OEM part number 981268, so it can be ordered as a direct equivalent for that seal in Evinrude outboard prop and driveshaft applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this oil seal?\u003c\/strong\u003e The Sierra 18-2073 measures 0.39 x 0.39 x 0.39 inches, sized to seat precisely in the gearcase bore against the shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2073 oil seal weigh?\u003c\/strong\u003e It weighs 0.07 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this seal used for?\u003c\/strong\u003e This seal is used in Evinrude outboard prop and driveshaft assemblies to keep gear lubricant contained and water out of the lower unit where the shaft passes through the housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2073 a genuine Evinrude\/OMC part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-2073 is an aftermarket seal manufactured by Sierra as an equivalent to OMC part 981268, not an OMC-branded original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-2073 seal have?\u003c\/strong\u003e It has a machined exterior finish for a precise fit within the gearcase housing bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many of these seals do I need for a gearcase rebuild?\u003c\/strong\u003e The Sierra 18-2073 is sold individually; check your specific gearcase parts breakdown, since some rebuilds call for more than one of this seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I reuse an old oil seal instead of replacing it?\u003c\/strong\u003e No, an oil seal like the 18-2073 is a wear item and should be replaced any time the gearcase is opened, since a worn seal allows water intrusion or lubricant loss.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat signs indicate this oil seal needs replacement?\u003c\/strong\u003e Milky or discolored gear lubricant and water found in the lower unit are common signs that the seal at this location, such as the Sierra 18-2073, has failed and needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the part number to reference when ordering?\u003c\/strong\u003e Reference Sierra part number 18-2073, or its OEM equivalent 981268, when ordering this seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091613403,"sku":"SIE-18-2073","price":16.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2073__56684.1722489412.500.750.jpg?v=1785188182","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2073-oil-seal-replaces-omc-981268-evinrude-johnson-outboard-prop-driveshaft-seal-1-750-in-id","provider":"Good Vibes Marina","version":"1.0","type":"link"}