Yamaha - Clutch Dog Lower Unit Shifting Component 6E5-45631-01-00. Overview. If your outboard isn't shifting clean into gear, there's a good chance the clutch dog is part of the problem. This is the piece that actually locks your gears in when you go from neutral into forward or reverse, and it takes a beating over time-especially if shifts are rushed or under load. When it's worn, you'll feel it right away with slipping or grinding. A solid clutch dog brings back that firm, positive engagement you expect from a Yamaha lower unit.. Key Features. Positive Gear Engagement Design - Locks gears securely in place for dependable forward and reverse operation.. Hardened Steel Construction - Built to handle repeated shifting stress and high torque loads.. Precision-Machined Edges - Ensures clean contact surfaces for smoother engagement and reduced wear.. Direct Yamaha Replacement Fit - Matches original specifications for proper alignment within the lower unit.. Engine & Boat Compatibility. Com