{"product_id":"sierra-18-2035-oil-seal-replaces-omc-evinrude-327031-outboard-prop-driveshaft-seal","title":"Sierra 18-2035 Oil Seal, Replaces OMC 327031, for Evinrude Outboard Prop and Driveshaft","description":"\u003cp\u003eThe Sierra 18-2035 Oil Seal is a direct-fit replacement seal designed for Evinrude outboard prop and driveshaft applications. It is built from durable metal with a machined finish, giving it the dimensional accuracy needed to maintain a reliable barrier against water intrusion and lubricant loss at the driveshaft and propeller shaft area of the lower unit. Keeping this seal in good condition is important for protecting the gear case from water contamination, which can lead to corrosion and premature bearing or gear failure if left unaddressed.\u003c\/p\u003e\u003cp\u003eThis seal carries the OMC 327031 cross-reference number, making it a straightforward replacement for boat owners servicing older Evinrude lower units where that part number is called for. The compact size (5.13 inches long, 4.0 inches wide, 1.25 inches high) and light 0.02-pound weight reflect its role as a small but critical sealing component rather than a structural part. It ships as a single oil seal unit, ready to be installed as part of routine lower unit maintenance or a full seal kit replacement.\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 18-2035\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Prop and Driveshaft Seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\/Brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\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\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999309815\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 oil seal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Evinrude outboard prop and driveshaft applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 327031\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2035 oil seal replace?\u003c\/strong\u003e The Sierra 18-2035 oil seal is a direct cross-reference for OMC part number 327031, so it can be used wherever that OEM number is specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2035 used for?\u003c\/strong\u003e It is an oil seal for Evinrude outboard prop and driveshaft applications, sealing against water intrusion and lubricant loss in the lower unit around the driveshaft and propeller shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-2035 seal made from?\u003c\/strong\u003e This oil seal is made from metal with a machined finish, in a black\/brown color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2035 oil seal weigh?\u003c\/strong\u003e The 18-2035 oil seal weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2035 oil seal?\u003c\/strong\u003e The seal measures 5.13 inches long, 4.0 inches wide, and 1.25 inches high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in one package?\u003c\/strong\u003e Each package of the Sierra 18-2035 contains one oil seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2035 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-2035 is a Sierra-branded replacement seal that cross-references to OMC 327031, rather than an OMC-branded original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2035 oil seal fit my Evinrude outboard's lower unit?\u003c\/strong\u003e The 18-2035 is designated for Evinrude outboard prop and driveshaft applications where the OMC 327031 seal is called for; check that number against your outboard's parts diagram to confirm fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the driveshaft oil seal need to be replaced?\u003c\/strong\u003e A worn or damaged oil seal like the 18-2035 can allow water into the lower unit or let lubricant escape, both of which can lead to gear case corrosion and bearing or gear damage if not corrected.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2035 come with installation hardware or a gasket?\u003c\/strong\u003e No, the 18-2035 package includes only the oil seal itself; gaskets and other lower unit hardware are separate parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2035 oil seal?\u003c\/strong\u003e The UPC for the Sierra 18-2035 oil seal is 030999309815.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090695899,"sku":"SIE-18-2035","price":9.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2035__79018.1722500133.500.750.jpg?v=1785189002","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2035-oil-seal-replaces-omc-evinrude-327031-outboard-prop-driveshaft-seal","provider":"Good Vibes Marina","version":"1.0","type":"link"}