Mercury - Quicksilver Cross and Bearing Kit Driveshaft U-Joint for MerCruiser Alpha One Gen II 805536A2. Overview. When your sterndrive starts making noise or vibration, the problem often traces back to worn U-joints. The Mercury Marine 805536A2 Quicksilver Cross and Bearing Kit is the OEM solution for restoring smooth power transfer and dependable performance on MerCruiser Alpha One Gen II sterndrives (serial numbers OD870000-OM400411). Built with hardened steel and precision-ground bearings, t