{"product_id":"transom-seal-for-omc-cobra-sterndrive-1978-1986-replaces-omc-909527-22-hole-sierra-18-2768","title":"Sierra 18-2768 Transom Seal, Replaces OMC 909527, Fits 1978-86 OMC Sterndrive All","description":"\u003cp\u003eThe Sierra 18-2768 Transom Seal is the gasket\/seal assembly that mounts at the transom of an OMC sterndrive, sealing the connection point between the boat's transom assembly and the outdrive unit to keep water out of the bilge and engine compartment while allowing the drive shafts and cables to pass through. This is a 22-hole seal built to the OEM bolt pattern for a direct, gasket-tight fit at reassembly. Sierra manufactures the part to meet or exceed the specifications of the original equipment it replaces, making it a straightforward like-for-like replacement when servicing a worn, cracked, or leaking transom seal during a sterndrive rebuild or bellows\/seal replacement job.\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 18-2768\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e OMC Bellows \u0026amp; Transom Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Hole Count:\u003c\/strong\u003e 22 hole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.42 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\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999562944\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 909527\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC Sterndrive, 1978-86, All\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e909527\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat boats does the Sierra 18-2768 transom seal fit?\u003c\/strong\u003e The Sierra 18-2768 fits OMC Sterndrive applications for 1978-86, all models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2768 replace?\u003c\/strong\u003e It replaces OEM part number 909527.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many bolt holes does this transom seal have?\u003c\/strong\u003e The 18-2768 is a 22-hole transom seal, matching the OEM bolt pattern for 1978-86 OMC Sterndrive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2768 transom seal weigh?\u003c\/strong\u003e It weighs 2.42 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2768 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured replacement part engineered to meet or exceed the specifications of the original OMC 909527 transom seal it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2768 transom seal?\u003c\/strong\u003e The Sierra 18-2768 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the transom seal on my OMC sterndrive?\u003c\/strong\u003e The transom seal should be replaced when it is cracked, worn, or leaking, which is typically checked during a sterndrive bellows and seal service to prevent water intrusion at the transom.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the exterior finish of the 18-2768?\u003c\/strong\u003e The Sierra 18-2768 transom seal has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2768 come with a warranty?\u003c\/strong\u003e Yes, the 18-2768 is covered under Sierra's standard customer satisfaction warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2768 fit an earlier OMC sterndrive from the late 1960s or early 1970s?\u003c\/strong\u003e No. The 18-2768 is designed for 1978-86 OMC Sterndrive applications; earlier OMC sterndrives use a different transom seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988112584923,"sku":"SIE-18-2768","price":157.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2768_lg__97041.1558122287.500.750.jpg?v=1785188284","url":"https:\/\/www.goodvibesmarina.com\/products\/transom-seal-for-omc-cobra-sterndrive-1978-1986-replaces-omc-909527-22-hole-sierra-18-2768","provider":"Good Vibes Marina","version":"1.0","type":"link"}