{"product_id":"sierra-18-2001-oil-seal-for-omc-evinrude-330137-outboard-prop-driveshaft-seal","title":"Sierra 18-2001 Oil Seal, Replaces OEM 330137","description":"\u003cp\u003eThe Sierra 18-2001 is an oil seal designed as a direct replacement component for marine drivetrain applications where OEM part 330137 is specified. Oil seals like this one prevent lubricant loss and block water intrusion at rotating shaft points, protecting gearcase and lower unit components from corrosion and premature wear. Sierra manufactures this seal to match the fit and function of the original equipment part it replaces, making it a straightforward swap when the factory seal has hardened, cracked, or begun leaking.\u003c\/p\u003e\u003cp\u003eThis is a compact, lightweight component at 0.03 pounds with item dimensions of 5 x 4 x 1 inches, consistent with a single shaft seal rather than a multi-piece kit. It carries UPC 030999309471 and ships as one unit (quantity 1). Because seals of this type are wear items, keeping a genuine-fit replacement like the Sierra 18-2001 on hand simplifies routine maintenance and helps avoid unplanned downtime from a failed seal.\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 18-2001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 330137\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Oil Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 5 x 4 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e NPT 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Service Type:\u003c\/strong\u003e Personal Watercraft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999309471\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eSpecific make, horsepower, and model-year fitment were not detailed in this listing. Confirm compatibility by matching OEM number 330137 against your engine or lower unit's original seal before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e330137\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2001 oil seal replace?\u003c\/strong\u003e The Sierra 18-2001 oil seal is a direct replacement for OEM part number 330137.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this oil seal weigh?\u003c\/strong\u003e The Sierra 18-2001 oil seal weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2001?\u003c\/strong\u003e This oil seal measures 5 x 4 x 1 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2001 a genuine Sierra part or a generic aftermarket seal?\u003c\/strong\u003e It is manufactured and sold under the Sierra brand as part number 18-2001, built to match the fit of the original 330137 seal it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in the package?\u003c\/strong\u003e The Sierra 18-2001 ships as a single oil seal, quantity 1 per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2001 have a threaded fitting?\u003c\/strong\u003e Yes, the listed thread size for this oil seal is NPT 3\/4 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2001 oil seal?\u003c\/strong\u003e The UPC is 030999309471.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-2001 fit my specific engine or model?\u003c\/strong\u003e Exact make, horsepower, and model fitment were not specified for the Sierra 18-2001; the best way to confirm fit is to match OEM number 330137 against the seal currently installed in your application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat vehicle type is the Sierra 18-2001 intended for?\u003c\/strong\u003e This seal is listed for personal watercraft service applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace an oil seal like the 18-2001?\u003c\/strong\u003e Oil seals harden and crack with age and heat cycling, which can let lubricant escape or allow water to enter the gearcase; replacing a worn seal with the Sierra 18-2001 restores that seal against leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the OEM 330137 seal still the correct one to cross-reference?\u003c\/strong\u003e Yes, OEM 330137 is the cross-reference number for the Sierra 18-2001 oil seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090073307,"sku":"SIE-18-2001","price":10.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2001__84864.1722514942.500.750.jpg?v=1785187986","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2001-oil-seal-for-omc-evinrude-330137-outboard-prop-driveshaft-seal","provider":"Good Vibes Marina","version":"1.0","type":"link"}