{"product_id":"sierra-18-9218-drive-shaft-for-mercruiser-alpha-one-gen-ii-stern-drive-replaces-59830a5-1971-1997","title":"Sierra 18-9218 Drive Shaft, Replaces 59830A5, for Mercruiser Alpha One\/Gen II Stern Drives","description":"\u003cp\u003eThe Sierra 18-9218 is a drive shaft engineered for Mercruiser Alpha One and Gen II stern drive units, built as a direct replacement for OEM number 59830A5. It fits Mercruiser R, MR, and Alpha One Gen II drive units with serial number 0K999999 and below, covering the 1971-1997 production span. The drive shaft transmits engine power from the transom assembly through the drive unit to the propeller shaft, and is a wear item that should match OEM dimensions and material specification for correct engagement with the U-joints and yoke assemblies in the drive train.\u003c\/p\u003e\u003cp\u003eThis component is manufactured to meet or exceed the specification of the original equipment part it replaces, and is intended to restore proper drive-line alignment and power transfer on stern drive units that use this driveshaft configuration. It measures 24 x 4.25 x 4.25 inches and weighs 11.26 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 18-9218\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drive Shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 11.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 24 x 4.25 x 4.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 59830A5\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser Alpha One and Gen II stern drive units\u003c\/li\u003e\n\u003cli\u003eApplies to R, MR, and Alpha One Gen II drive units with serial number 0K999999 and below\u003c\/li\u003e\n\u003cli\u003eProduction years 1971-1997\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e59830A5\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-9218 drive shaft fit?\u003c\/strong\u003e The Sierra 18-9218 fits Mercruiser Alpha One and Gen II stern drive units, specifically R, MR, and Alpha One Gen II drives with serial number 0K999999 and below, covering the 1971-1997 production span.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-9218 a direct replacement for OEM part 59830A5?\u003c\/strong\u003e Yes, the Sierra 18-9218 drive shaft is a direct replacement for OEM number 59830A5.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this drive shaft?\u003c\/strong\u003e The Sierra 18-9218 measures 24 x 4.25 x 4.25 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-9218 drive shaft weigh?\u003c\/strong\u003e It weighs 11.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the Sierra 18-9218 have?\u003c\/strong\u003e This drive shaft has a machined finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-9218 work on a serial number above 0K999999?\u003c\/strong\u003e No, the Sierra 18-9218 is designated for R, MR, and Alpha One Gen II drive units with serial number 0K999999 and below; drive units above that serial number use a different part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra offer a warranty on the 18-9218 drive shaft?\u003c\/strong\u003e Sierra parts, including the 18-9218 drive shaft, are covered under Sierra's standard customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 18-9218 and the original Mercruiser drive shaft?\u003c\/strong\u003e The 18-9218 is manufactured to meet or exceed the specification of the original 59830A5 drive shaft it replaces, so fit and power transfer function match the OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this part sold as a complete assembly?\u003c\/strong\u003e The 18-9218 is a single drive shaft component; related drive train parts such as U-joints, center sockets, and yoke couplers are sold as separate part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of Mercruiser stern drives use the 18-9218?\u003c\/strong\u003e The 18-9218 drive shaft applies to Mercruiser Alpha One and Gen II drive units built between 1971 and 1997, up to serial number 0K999999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the 18-9218 myself?\u003c\/strong\u003e The Sierra 18-9218 drive shaft is a stern drive component installed as part of the drive unit's internal driveline, and installation should follow the drive unit service procedure for the Alpha One\/Gen II housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988436562139,"sku":"SIE-18-9218","price":575.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-9218_lg__70898.1558170889.500.750.jpg?v=1785188712","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-9218-drive-shaft-for-mercruiser-alpha-one-gen-ii-stern-drive-replaces-59830a5-1971-1997","provider":"Good Vibes Marina","version":"1.0","type":"link"}