90402-V15-003 Seal Washer - Overview. The 90402-V15-003 Seal Washer is an essential component in Honda marine engine systems, specifically designed to support power tilt and trim systems. Its primary function is to create a reliable watertight seal that prevents fluid leaks, protecting sensitive internal components and maintaining efficient system operation. Manufactured as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. K