{"product_id":"mercruiser-upper-shaft-98230a1-oem","title":"MerCruiser Upper Shaft 98230A1 - Genuine OEM Sterndrive Component","description":"\u003cp\u003eGenuine MerCruiser OEM upper shaft engineered for precision fit and reliable power transmission in sterndrive assemblies. This factory-specification component is a critical element of the drive system, transmitting engine power to the lower unit while maintaining proper alignment and smooth operation in demanding marine environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine MerCruiser OEM replacement part - factory quality and fit\u003c\/li\u003e\n\u003cli\u003ePrecision-machined from high-strength marine-grade steel\u003c\/li\u003e\n\u003cli\u003eHeat-treated for optimal strength, hardness, and fatigue resistance\u003c\/li\u003e\n\u003cli\u003eEngineered to resist corrosion, wear, and saltwater exposure\u003c\/li\u003e\n\u003cli\u003eMaintains critical tolerances for proper bearing fit and alignment\u003c\/li\u003e\n\u003cli\u003eFactory-tested for dimensional accuracy and material specifications\u003c\/li\u003e\n\u003cli\u003eEssential component for reliable power transmission and drive operation\u003c\/li\u003e\n\u003cli\u003eDirect replacement for worn, damaged, or corroded upper shafts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 98230A1\u003c\/li\u003e\n\u003cli\u003eManufacturer: MerCruiser (Mercury Marine)\u003c\/li\u003e\n\u003cli\u003eApplication: MerCruiser Sterndrive Units\u003c\/li\u003e\n\u003cli\u003eMaterial: High-strength marine-grade steel\u003c\/li\u003e\n\u003cli\u003eType: Upper drive shaft\u003c\/li\u003e\n\u003cli\u003eFinish: Corrosion-resistant coating or plating\u003c\/li\u003e\n\u003cli\u003eHeat Treatment: Factory-specified for optimal hardness and strength\u003c\/li\u003e\n\u003cli\u003eOEM Quality: Factory specification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFunction and Importance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe upper shaft is a critical power transmission component that connects the engine to the sterndrive lower unit. It transmits rotational power from the engine through the gimbal housing and into the drive assembly, where it drives the propeller shaft through the gear reduction system. The upper shaft must maintain precise alignment, withstand high torque loads, and operate smoothly under varying speeds and loads. It runs in precision bearings and seals that maintain proper clearances while preventing water intrusion. Worn or damaged upper shafts can cause vibration, noise, power loss, bearing failure, and potential drive damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaintenance and Replacement:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInspect the upper shaft during drive service intervals for wear, scoring, corrosion, or damage. Check for excessive play in bearings, unusual noise, or vibration during operation. Replace the shaft if wear exceeds factory specifications, if splines are damaged, or if corrosion has compromised the surface finish. Always replace associated bearings, seals, and gaskets when installing a new upper shaft. Use genuine OEM shafts to ensure proper material specifications, heat treatment, dimensional accuracy, and long service life. Follow factory alignment procedures and torque specifications for optimal performance and reliability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for specific MerCruiser sterndrive models. Verify part number compatibility with your drive model and serial number before ordering. Consult factory service manuals or authorized dealers for application-specific fitment information, installation procedures, and alignment specifications.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563929042980,"sku":"98230A1","price":546.62,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/98230A1.png?v=1771630617","url":"https:\/\/marisolmarine.com\/products\/mercruiser-upper-shaft-98230a1-oem","provider":"Marisol Marine Company","version":"1.0","type":"link"}