91255-ZW1-003 Water (Outer) Seal - Overview. The 91255-ZW1-003 Water (Outer) Seal is a crucial component within Honda marine engine systems, specifically designed to prevent water intrusion and preserve lubrication in the outer seal area. This seal supports the propulsion and cooling systems by maintaining a secure barrier against water contamination, which helps ensure the reliability and longevity of the marine engine.. Key Features. OEM genuine Honda water (outer) seal designed to meet factor