91251-ZY3-003 Seal (26X42X7) - Overview. The 91251-ZY3-003 Seal (26X42X7) is a crucial component in Honda marine engine systems, designed to maintain effective water sealing within the engine's mechanical assemblies. With an inner diameter of 26mm, an outer diameter of 42mm, and a thickness of 7mm, this seal functions to prevent water ingress and leaks, thus protecting vital internal parts and ensuring the smooth operation of your marine engine. It ensures seamless integration with existing part