{"product_id":"center-socket-39383t-for-mercruiser-alpha-one-gen-ii-bravo-omc-cobra-u-joint-drive-shaft-sierra-18-2128","title":"Sierra 18-2128 Center Socket for MerCruiser Alpha One, Bravo, MC-I, MC II, TS, IA\/IB\/IC and EZ, Gen II, and OMC Cobra Drives","description":"\u003cp\u003eThe Sierra 18-2128 Center Socket is a stern drive coupling component that connects the drive shaft assembly to the U-joint, transferring power from the engine to the outdrive. It is a fit-specific part, meaning it is engineered to match particular drive units rather than serving as a universal fit across all stern drives, so confirming the correct application before ordering is important.\u003c\/p\u003e\u003cp\u003eThis Center Socket is designed for MerCruiser IA\/IB\/IC and EZ, MC-I, R, MR, Alpha One, and Gen II drives up to serial number 0L949778, as well as MerCruiser Bravo drives up to serial number 0M111207, MC II, and TS drives. It also fits all OMC Cobra sterndrives. Sierra states that each part it manufactures meets or exceeds the specifications of the original equipment part it replaces, making this Center Socket a direct functional replacement for the applicable OEM component.\u003c\/p\u003e\u003cp\u003eThe Center Socket ships as a single component and is sold individually. It weighs 2.04 pounds.\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 18-2128\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Center Socket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999311467\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Fit-specific; confirm drive application before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser IA\/IB\/IC and EZ, MC-I, R, MR, Alpha One, and Gen II (serial number 0L949778 and below)\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo (serial number 0M111207 and below), MC II, and TS\u003c\/li\u003e\n\u003cli\u003eAll OMC Cobra sterndrives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e393\u003c\/li\u003e\n\u003cli\u003e735\u003c\/li\u003e\n\u003cli\u003e393831\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2128 Center Socket fit?\u003c\/strong\u003e This Center Socket fits MerCruiser IA\/IB\/IC and EZ, MC-I, R, MR, Alpha One, and Gen II drives with serial number 0L949778 and below, MerCruiser Bravo drives with serial number 0M111207 and below, MC II, TS drives, and all OMC Cobra sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2128 Center Socket a universal fit for all stern drives?\u003c\/strong\u003e No. Sierra designates part 18-2128 as a fit-specific component, so it is built for the listed MerCruiser and OMC Cobra drive applications rather than a one-size-fits-all fit, and confirming your drive model and serial number before ordering is recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-2128 Center Socket replace?\u003c\/strong\u003e The Sierra 18-2128 Center Socket cross-references to OEM numbers 393, 735, and 393831.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2128 Center Socket weigh?\u003c\/strong\u003e The Sierra 18-2128 Center Socket weighs 2.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many Center Sockets come in the package?\u003c\/strong\u003e Part 18-2128 is sold as a single Center Socket, with a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra Center Socket perform the same as the original equipment part?\u003c\/strong\u003e Sierra states that the 18-2128 Center Socket meets or exceeds the specifications of the original equipment part it replaces, so it functions as a direct replacement in its listed applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2128 Center Socket fit a MerCruiser Bravo drive with a serial number above 0M111207?\u003c\/strong\u003e The 18-2128 Center Socket is listed for MerCruiser Bravo drives with serial number 0M111207 and below; drives above that serial number are not covered by this fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2128 fit OMC Cobra sterndrives?\u003c\/strong\u003e Yes, the Sierra 18-2128 Center Socket fits all OMC Cobra sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a Center Socket used for on a stern drive?\u003c\/strong\u003e A Center Socket, such as Sierra part 18-2128, is a coupling component within the drive shaft assembly that connects to the U-joint to transmit engine power to the stern drive unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the Sierra 18-2128 Center Socket something I can do myself?\u003c\/strong\u003e Because the 18-2128 Center Socket is part of the drive shaft coupling assembly and fit-specific to the drive model, Sierra recommends consulting an authorized dealer to confirm the correct fit and installation for your specific drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2128 fit MerCruiser Alpha One drives?\u003c\/strong\u003e Yes, the Sierra 18-2128 Center Socket is listed for MerCruiser Alpha One drives, along with IA\/IB\/IC and EZ, MC-I, R, MR, and Gen II drives at or below serial number 0L949778.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988092334299,"sku":"SIE-18-2128","price":91.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2128_lg__05380.1649077556.500.750.jpg?v=1785188518","url":"https:\/\/www.goodvibesmarina.com\/products\/center-socket-39383t-for-mercruiser-alpha-one-gen-ii-bravo-omc-cobra-u-joint-drive-shaft-sierra-18-2128","provider":"Good Vibes Marina","version":"1.0","type":"link"}