40225-ZY3-010 R Idol Port Seal - Overview. The 40225-ZY3-010 R Idol Port Seal is an essential component within Honda marine engine systems. This seal supports the engine's idle port system, providing a watertight and airtight barrier that prevents leaks and contaminants from entering critical engine areas. Its primary function is to ensure optimal sealing around the right idle port, aiding reliable engine operation in marine environments.. Key Features. Designed as a genuine OEM Honda part to gu