90501-ZVD-000 Tongued Washer - Overview. The 90501-ZVD-000 Tongued Washer is an essential component designed specifically for Honda marine engine systems. This washer supports the shift shaft assembly by providing precise alignment and preventing rotation during operation, ensuring the smooth function and reliability of vital engine controls. It is engineered to meet exact factory specifications, offering seamless integration with corresponding OEM parts to maintain optimal system performance an