Quicksilver - Cross and Bearing U-Joint Kit Alpha/Bravo/Vazer Series Hardened Steel P865496A02. Overview. There's a moment every boater knows well - the instant you shift into gear and feel the whole boat engage. It's smooth, firm, and reassuring when your driveline is healthy. But when a U-joint starts to wear, that feeling changes. You might hear a clunk, feel a vibration, or notice the drive doesn't respond as cleanly. This Mercury Marine part brings back that tight, confident engagement. It'