90202-ZY1-000 Special (16mm) Nut - Overview. The 90202-ZY1-000 Special (16mm) Nut is a critical fastening component within Honda marine engine systems. This specialized nut supports secure mounting and assembly, ensuring the stability and reliability of your Honda marine equipment. Designed for use within various Honda marine engine models, it helps maintain operational integrity by fastening parts such as flywheels and other mechanical assemblies. With precise dimensions and strict adherence to