Yamaha - Woodruff Key Engine Timing Component 90280-03M03-00. Overview. You don't think much about a woodruff key until one lets go and throws everything out of sync. I've seen engines lose timing or slip just from this little piece wearing down or shearing. The Yamaha Woodruff Key 90280-03M03-00 keeps critical components locked exactly where they need to be. It's a small part, but it protects a whole lot of moving pieces.. Key Features. • Locks Components in Alignment - Keeps rotating parts properly positioned on the shaft.. • Maintains Timing Accuracy - Helps prevent slippage that can affect engine performance.. • Precision Yamaha Fitment - Built to exact dimensions for reliable engagement.. • High-Strength Metal Build - Designed to handle torque and resist deformation.. • Essential Service Component - Ideal for repairs, rebuilds, and preventative maintenance.. Engine & Boat Compatibility. The Yamaha Woodruff Key 90280-03M03-00 is used across a range of Yamaha outboard engines and ma