90478-700-000 Washer A (6mm) - Overview. The 90478-700-000 Washer A (6mm) is an essential component for Honda marine engine systems. This washer is designed to provide a reliable sealing and mounting function, crucial for maintaining the integrity and assembly of various marine equipment. It ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda part ensuring factory specification accuracy.. Flat, plain, metric washer type designed for 6mm applications.. Crucial for proper mechanical assembly and component sealing.. Matches factory dimensions and tolerances for perfect fit.. Integrates cleanly with hardware, seals, and housings in Honda marine engines.. Contributes to maintaining overall system reliability and performance.. Why Choose Genuine OEM. Using original Honda parts like the 90478-700-000 Washer A preserves the integrity of your marine engine. OEM parts maintain the exact material quality, precision dim