90508-ZZ5-D01 Wave Washer - Overview. The 90508-ZZ5-D01 Wave Washer is a specialized component designed for Honda marine engine systems. This washer plays a critical role in maintaining tension and reducing vibration within the assembly, ensuring reliable operation and longevity of your marine equipment. The Wave Washer is an essential part of Honda's rigging and accessory lineup, crafted to match factory specifications for seamless integration and durability.. Key Features. A genuine Honda OEM