Mercury - Gimbal Ring Trim Sender Bearing Bushing Alpha One Gen II & Bravo Quicksilver 847637. Overview. When you're out on the water, you don't think about every bolt or bearing beneath you - until one fails. That's why seasoned boaters trust parts that simply work. The Mercury Quicksilver 847637 Gimbal Ring Trim Sender Bearing Bushing is one of those behind-the-scenes components that makes the difference between a smooth, confident ride and an unexpected day at the dock. It's the kind of part