U-Joints
- Mercruiser GKN U-Joint | Sierra 18-6406SIERRA-18-6406Qty In Stock: 28Brand: SierraReplacement U-joint with external style clips for various Mercruiser Alpha I Gen II & Bravo stern drives. Learn MoreHeavy Duty U-Joint | Sierra 18-2174SIERRA-18-2174Qty In Stock: 34Brand: SierraReplacement heavy duty U-joint with internal retaining clips for various Mercruiser, OMC & Volvo Penta stern drives. Learn MoreHeavy Duty U-Joint | Sierra 18-2104SIERRA-18-2104Qty In Stock: 16Brand: SierraReplacement heavy duty U-joint with internal retaining clips for various Mercruiser, OMC & stern drives. Learn More