90751-ZV4-C20 Spring (3.0x22) Pin - Overview. The 90751-ZV4-C20 Spring (3.0x22) Pin is a specialized OEM component supporting Honda marine engine systems, particularly integral to marine rigging and accessory assemblies. Serving as a precise fastener, this spring pin ensures secure positioning of components, preventing misalignment and maintaining mechanical integrity. Its design for seamless integration with existing hardware facilitates durable and reliable operation under marine environmental