90501-ZV5-A10 Washer (20mm) - Overview. The 90501-ZV5-A10 Washer (20mm) is a vital hardware component used in Honda marine engine systems. It serves a critical role in securing engine parts, maintaining proper assembly, and supporting overall engine reliability. Designed as an OEM genuine part, this washer guarantees precise dimensions and factory specifications to ensure seamless integration within the engine's mechanical assemblies. It is crafted to maintain optimal performance and durability under demanding marine conditions.. Key Features. OEM genuine Honda washer designed for use in marine engines.. Measures 20mm and suits precise factory tolerances for accurate fit.. Crucial for securing components and maintaining system integrity.. Helps maintain mechanical stability and prevents loosening of parts.. Manufactured with durable materials to withstand marine environments.. Ensures seamless compatibility with existing hardware and assemblies.. Why Choose Genuine OEM. Using original