91201-ZG9-U71 Oil Seal (25x38x7) - Overview. The 91201-ZG9-U71 Oil Seal (25x38x7) is a critical component within Honda marine engine systems, designed to prevent oil leakage and contamination. This oil seal supports the engine's mechanical system by sealing rotating shafts and internal components, ensuring the engine operates reliably under demanding marine conditions. Made to precise factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and