Yamaha Dog Clutch 6T5-45631-01-00. Overview. The Yamaha Dog Clutch 6T5-45631-01-00 is a genuine original equipment manufacturer component designed to enable smooth and reliable gear engagement within your Yamaha outboard's lower unit. This critical part connects and disconnects gears, allowing for seamless shifting between forward, neutral, and reverse.. Engineered to Yamaha's exact specifications, this dog clutch ensures a precise fit and dependable performance. It is an ideal replacement for w