Yamaha - Clutch Dog - Lower Unit Gear Component - 63D-45631-01-00

Overview

The clutch dog is a critical part inside the lower unit that allows your engine to shift between forward, neutral, and reverse. When it starts to wear, you’ll feel it right away—grinding during shifts, slipping out of gear, or delayed engagement. This Yamaha clutch dog is built to restore clean, solid gear engagement and keep power transferring smoothly to the prop. It’s one of the key components that keeps your drivetrain working the way it should.

Key Features

• Gear Engagement Function – Connects and disconnects the propeller drive during shifting.

• Smooth Shifting Performance – Helps eliminate grinding and ensures clean gear transitions.

• Efficient Torque Transfer – Transfers engine power directly to the propeller shaft.

• OEM Yamaha Fitment – Built to factory specifications for precise fit and durability.

Engine & Boat Compatibility

• Compatible with select Yamaha outboards that utilize this clutch dog (confirm fitment by model and year)

FAQ

Q: What are signs of a worn clutch dog?
A: Grinding when shifting, slipping out of gear, or delayed engagement.

Q: What does a clutch dog do?
A: It locks the gears together to allow forward, neutral, and reverse operation.

Q: Can this affect boat performance?
A: Yes, it directly impacts shifting reliability and power transfer.

Q: Should this be replaced during lower unit rebuild?
A: Yes, especially if there are signs of wear, rounding, or damage.

• Supersessions
  63D-45631-00-00