{"product_id":"sierra-18-2454-drain-plug-for-omc-cobra-sx-sterndrive-drives-replaces-oem-3854539-3-8-16-thread","title":"Sierra Drain Plug 18-2454, Replaces 3854539, for OMC Cobra SX Sterndrive","description":"\u003cp\u003eThe Sierra Drain Plug 18-2454 is a replacement drain plug engineered for OMC Cobra SX sterndrives. It is used to seal the drain\/fill point on the drive housing, sealing against water intrusion and oil or lubricant loss during operation and storage. The plug features a 3\/8 inch - 16 thread and is designed to be used with a matching O-ring (Sierra 18-7145) to maintain a watertight seal at the drain port.\u003c\/p\u003e\u003cp\u003eThis part directly replaces OEM number 3854539, allowing owners of OMC Cobra SX drive systems to source a correct-fit plug without needing the original manufacturer part. Keeping the drain plug and its O-ring in good condition is important maintenance for any I\/O sterndrive, since a worn thread or failed seal at this point can allow lubricant to leak out or water to enter the lower unit.\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 18-2454\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drain Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 3\/8 inch - 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMating O-Ring:\u003c\/strong\u003e Sierra 18-7145\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\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\u003eUPC:\u003c\/strong\u003e 808282339784\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Sterndrive Engine Parts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC Cobra SX sterndrives\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3854539\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2454 drain plug fit?\u003c\/strong\u003e The Sierra 18-2454 is designed for OMC Cobra SX sterndrives, sealing the drive housing's drain and fill port.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2454 replace an OEM part number?\u003c\/strong\u003e Yes, Sierra 18-2454 directly replaces OEM number 3854539 on OMC Cobra SX sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size is the 18-2454 drain plug?\u003c\/strong\u003e It uses a 3\/8 inch - 16 thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the drain plug come with an O-ring?\u003c\/strong\u003e The plug itself is sold as 18-2454; it is designed to be used with a matching Sierra 18-7145 O-ring for a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the O-ring included with part 18-2454?\u003c\/strong\u003e The dossier lists 18-2454 as the drain plug and 18-7145 as the O-ring used with it as a separate part number, so check whether both are included in your order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2454 drain plug weigh?\u003c\/strong\u003e The Sierra 18-2454 drain plug weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this drain plug?\u003c\/strong\u003e The 18-2454 drain plug measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is part 18-2454 used for?\u003c\/strong\u003e It seals the drain point on an OMC Cobra SX sterndrive housing, preventing lubricant loss and water intrusion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2454 a genuine replacement or aftermarket equivalent?\u003c\/strong\u003e 18-2454 is a replacement part manufactured by Sierra that is a direct equivalent to OEM number 3854539.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2454 fit other OMC sterndrive models besides the Cobra SX?\u003c\/strong\u003e The listed fitment for 18-2454 is OMC Cobra SX sterndrives; no other drive models are specified for this part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106359003,"sku":"SIE-18-2454","price":10.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2454__46674.1558184682.500.750.jpg?v=1785189162","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2454-drain-plug-for-omc-cobra-sx-sterndrive-drives-replaces-oem-3854539-3-8-16-thread","provider":"Good Vibes Marina","version":"1.0","type":"link"}