91253-ZW9-003 Water (6Mm) Seal - Overview. The 91253-ZW9-003 Water (6Mm) Seal is a precision-engineered component essential for Honda marine engine systems, specifically designed for the water pump and vertical shaft assemblies. This seal plays a critical role in preventing water ingress, maintaining system integrity, and ensuring the reliable operation of your marine engine. As a genuine Honda OEM part, it matches factory specifications, dimensions, and tolerances exactly, allowing flawless int