90406-KV3-780 Washer (6Mm) - Overview. The 90406-KV3-780 Washer (6MM) is a precision-engineered component designed for Honda marine engine systems. It plays a critical role in securing parts and preventing wear by providing stable mounting and sealing functions within the assembly. This washer ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda part designed specifically for marine engine applications.. Functions as a 6mm washer, critical in rigging and accessory assemblies.. Manufactured to meet factory specifications, ensuring perfect fit and tolerance.. Prevents loosening and wear, contributing to mechanical integrity.. Compatible with Honda marine systems to maintain OEM reliability.. Durable construction supports longevity in marine environments.. Why Choose Genuine OEM. Using original Honda parts like the 90406-KV3-780 Washer (6MM) preserves the integrity of your marine engine. OEM parts maintain the e