Yamaha Dog Clutch 6T5-45631-10-00. Overview. The Yamaha Dog Clutch 6T5-45631-10-00 is a genuine original equipment manufacturer component designed to ensure smooth and reliable gear engagement within your Yamaha outboard's lower unit. This essential part connects and disengages gears, allowing seamless shifting between forward, neutral, and reverse.. Engineered to Yamaha's exact specifications, this dog clutch provides a precise fit and dependable performance. It is an ideal replacement for worn