Yamaha - Woodruff Key Engine Timing Component 90280-05049-00. Overview. It's a tiny part, but when a woodruff key goes, it can throw everything off. I've seen engines lose timing or spin components out of alignment just because this piece sheared or wore down. The Yamaha Woodruff Key 90280-05049-00 is what keeps critical rotating parts locked in place where they belong. It's one of those simple parts you don't think about-until it fails.. Key Features. • Secures Rotating Components - Locks shafts and mating parts in correct alignment.. • Maintains Engine Timing Integrity - Helps ensure proper positioning of key engine components.. • Precision Yamaha Fit - Manufactured to exact dimensions for reliable engagement.. • Hardened Metal Construction - Built to handle torque and resist shearing under load.. • Simple Replacement Part - Easy to install during routine service or repairs.. Engine & Boat Compatibility. The Yamaha Woodruff Key 90280-05049-00 is used across a wide range of Yamaha out