Yamaha - Dog Clutch Gear Engagement Component 6DA-45631-00-00. Overview. The Yamaha Dog Clutch 6DA-45631-00-00 is a critical internal component that allows your outboard to shift cleanly between forward, neutral, and reverse. It locks gears together inside the lower unit, transferring power when engaged. When a dog clutch starts to wear, you'll notice it right away-slipping out of gear, grinding, or difficulty staying engaged. If your engine won't hold gear under load, this is one of the first parts to inspect.. Key Features. • Positive Gear Engagement - Locks gears together for reliable forward and reverse operation.. • OEM Fit Precision - Built to Yamaha specifications for proper alignment and performance.. • Improved Shifting Stability - Helps prevent gear slippage and disengagement under load.. • High-Strength Construction - Designed to handle torque, shock loads, and marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha engine model and pa