{"product_id":"sierra-18-2047-oil-seal-35mm-id-x-55mm-od-x-10mm-replaces-oem-946242","title":"Sierra Oil Seal 18-2047 - Replaces Volvo 958860-9","description":"\u003cp\u003eThe Sierra 18-2047 Oil Seal is a precision-machined replacement seal designed for marine drive and lower unit applications where a reliable oil barrier is required. It is built to prevent lubricant leakage and keep contaminants such as water out of gear housings, helping protect internal components from premature wear and corrosion. This seal is manufactured with a machined exterior finish for a consistent, accurate fit against the housing bore, and it is engineered to directly replace the Volvo 958860-9 seal, making it a straightforward swap for boat owners and marine technicians performing routine maintenance or seal replacement during a rebuild.\u003c\/p\u003e\u003cp\u003eAt just 0.06 pounds, this is a compact, lightweight component sized for tight tolerances typical of drive and gearcase seals. Sierra sources and manufactures its parts to consistent quality standards, and this seal carries a Taiwan country of origin. Whether you are servicing a lower unit, replacing a worn seal that has started to leak, or completing a full gearcase rebuild, the 18-2047 is sized and finished to restore a proper seal without modification.\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 18-2047\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Volvo 958860-9\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\u003eWeight:\u003c\/strong\u003e 0.06 pounds\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\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDirect cross-reference replacement for Volvo 958860-9.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVOLVO 958860-9\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2047 oil seal fit?\u003c\/strong\u003e The Sierra 18-2047 is a direct cross-reference replacement for Volvo 958860-9, so it fits wherever that Volvo seal is specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2047 the same as Volvo part 958860-9?\u003c\/strong\u003e Yes, Sierra 18-2047 is manufactured as a direct equivalent to Volvo 958860-9 and can be used as a replacement for it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2047 oil seal weigh?\u003c\/strong\u003e This oil seal weighs 0.06 pounds, making it a small, lightweight component typical of gearcase and drive seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2047 seal?\u003c\/strong\u003e The seal measures 0.39 x 0.39 x 0.39 inches, a compact size sized to seat directly in the original housing bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the exterior finish on this seal?\u003c\/strong\u003e The Sierra 18-2047 has a machined exterior finish, which provides a precise, consistent fit against the mounting bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-2047 oil seal manufactured?\u003c\/strong\u003e The country of origin for the 18-2047 oil seal is Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2047 is a Sierra-branded part manufactured as a cross-reference replacement for the OEM Volvo 958860-9 seal, not a copy sold under the original OEM label.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-2047?\u003c\/strong\u003e Ordering the Sierra 18-2047 includes one oil seal; no additional hardware or gaskets are included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this seal be used during a lower unit rebuild?\u003c\/strong\u003e Yes, the Sierra 18-2047 is suited for use when rebuilding a gearcase or lower unit that originally used the Volvo 958860-9 seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace this oil seal?\u003c\/strong\u003e An oil seal like the 18-2047 is typically replaced when it begins leaking gear lubricant or allowing water intrusion into the housing, both signs of a worn or failed seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091252955,"sku":"SIE-18-2047","price":34.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2047__22023.1722515193.500.750.jpg?v=1785188896","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2047-oil-seal-35mm-id-x-55mm-od-x-10mm-replaces-oem-946242","provider":"Good Vibes Marina","version":"1.0","type":"link"}