A smooth-running outboard depends on tight, reliable connections between its components, and the Yamaha Collar (90387-06205-00) helps ensure just that. Designed for secure placement in key structural and mechanical assemblies, this small but essential part prevents excessive movement, reduces vibration, and keeps everything aligned for optimal performance. Over time, worn or damaged collars can lead to misalignment, added stress on other parts, and even premature wear. Replacing them with a genuine Yamaha OEM collar helps maintain the precision your outboard was built for.. Built for Strength & Stability:. Exact OEM Fit - Engineered to Yamaha's factory specifications for seamless installation and reliable performance.. Tough Marine-Grade Construction - Resists corrosion, vibration, and prolonged exposure to harsh conditions.. Reinforces Structural Integrity - Keeps engine components in place, reducing movement and minimizing wear.. A loose or worn collar might seem minor, but over time