Yamaha - Woodruff Key Engine Timing Component 90280-05029-00. Overview. This is one of those small parts that does a big job behind the scenes. I've had engines come apart where everything looked fine until you find the key sheared and the timing thrown off. The Yamaha Woodruff Key 90280-05029-00 keeps critical components locked in place so nothing slips under load. It's simple, but it's absolutely essential to keeping everything running the way it should.. Key Features. • Locks Components in Position - Keeps shafts and rotating parts properly aligned.. • Supports Accurate Timing - Helps maintain correct positioning for engine operation.. • Precision Yamaha Fitment - Built to exact specifications for reliable engagement.. • High-Strength Metal Design - Made to handle torque and resist deformation.. • Service-Friendly Replacement - Easy to install during maintenance or repairs.. Engine & Boat Compatibility. The Yamaha Woodruff Key 90280-05029-00 is used across a variety of Yamaha outboa