Yamaha - Woodruff Key Flywheel & Shaft Alignment 90280-03024-00. Overview. This woodruff key is one of those parts that keeps everything lined up and running right without much attention. It locks components like the flywheel into position so your engine timing stays consistent. I've seen engines run rough or lose timing just because this piece was worn or slightly sheared. It's a simple part, but it plays a big role every time you fire up the motor.. Key Features. Precise Alignment Support - Keeps rotating components properly indexed for accurate engine timing.. Secure Anti-Slip Fit - Prevents movement between shaft and connected parts under load.. Durable Metal Construction - Built to handle torque and repeated engine use.. Exact Yamaha Fitment - Matches factory keyway dimensions for proper installation.. Engine & Boat Compatibility. Used across a wide range of Yamaha outboards in flywheel, crankshaft, and other keyed shaft applications. Essential for maintaining alignment in systems