{"product_id":"sierra-18-2684-lower-unit-seal-kit-for-evinrude-johnson-outboards-replaces-omc-304764-321788-309044","title":"Sierra Lower Unit Seal Kit 18-2684 - Evinrude Outboard Gear Housing Shift Rod Gasket, Oil Seal and Spaghetti Seal","description":"\u003cp\u003eThe Sierra Lower Unit Seal Kit 18-2684 is a complete reseal kit for Evinrude outboard gear housings (lower units), bundling the three seals most commonly needed together in one part number. The kit contains a shift rod gasket, an oil seal, and a spaghetti seal, each engineered to the same fit, form, and function as the original equipment part it replaces. Rather than sourcing three separate seals individually and risking a mismatch, installers can order this single kit number and have everything needed for a lower unit reseal in one box.\u003c\/p\u003e\u003cp\u003eEach component in the kit corresponds to a specific original equipment part: the shift rod gasket (Sierra 18-0882) replaces OEM 304764, the oil seal (Sierra 18-2032) replaces OEM 321788, and the spaghetti seal (Sierra 18-4248) replaces OEM 309044. Sierra also cross-references this kit to Mallory 9-74105 and GLM 87606 for buyers searching under those numbers. The kit is intended for gear housing service where the shift rod seal, propeller shaft oil seal, and housing spaghetti seal are being replaced as part of a lower unit rebuild or leak repair.\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 18-2684\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Shift Rod Gasket (18-0882), Oil Seal (18-2032), Spaghetti Seal (18-4248)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Component OEM Numbers:\u003c\/strong\u003e 304764, 321788, 309044\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\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\u003eApplication:\u003c\/strong\u003e Evinrude outboard gear housing (lower unit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Form:\u003c\/strong\u003e Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Evinrude outboard gear housing (lower unit) applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-74105\u003c\/li\u003e\n\u003cli\u003eGLM 87606\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2684 lower unit seal kit include?\u003c\/strong\u003e The kit contains three seals for an Evinrude outboard gear housing: a shift rod gasket (Sierra 18-0882), an oil seal (Sierra 18-2032), and a spaghetti seal (Sierra 18-4248).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this kit cross-reference to?\u003c\/strong\u003e The individual seals in kit 18-2684 correspond to original equipment numbers 304764 (shift rod gasket), 321788 (oil seal), and 309044 (spaghetti seal), and the kit as a whole is also referenced to Mallory 9-74105 and GLM 87606.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2684 kit made to OEM specifications?\u003c\/strong\u003e Yes, each seal in the 18-2684 kit is engineered to match the fit, form, and function of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2684 seal kit weigh?\u003c\/strong\u003e The Sierra Lower Unit Seal Kit 18-2684 weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2684 seal kit packaging?\u003c\/strong\u003e The kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a spaghetti seal used for in this kit?\u003c\/strong\u003e The spaghetti seal included in kit 18-2684 (Sierra 18-4248, replacing OEM 309044) seals the gear housing during lower unit assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include a shift rod gasket?\u003c\/strong\u003e Yes, kit 18-2684 includes a shift rod gasket, Sierra part 18-0882, which replaces OEM number 304764.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat application is the 18-2684 seal kit designed for?\u003c\/strong\u003e This kit is designed for Evinrude outboard gear housing (lower unit) service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy the individual seals separately instead of the kit?\u003c\/strong\u003e The shift rod gasket, oil seal, and spaghetti seal are sold together under Sierra kit number 18-2684, which bundles all three components needed for a gear housing reseal into one part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces come in the Sierra 18-2684 kit?\u003c\/strong\u003e The 18-2684 kit contains 3 seal components: a shift rod gasket, an oil seal, and a spaghetti seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2684 kit backed by a warranty?\u003c\/strong\u003e Yes, the Sierra 18-2684 lower unit seal kit is backed by Sierra's warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109013211,"sku":"SIE-18-2684","price":28.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2684_lg__65831.1558123183.500.750.jpg?v=1785188012","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2684-lower-unit-seal-kit-for-evinrude-johnson-outboards-replaces-omc-304764-321788-309044","provider":"Good Vibes Marina","version":"1.0","type":"link"}