14711-921-000 Intake Valve - Overview. The 14711-921-000 Intake Valve is a crucial component within Honda marine engine systems, responsible for regulating the flow of the air-fuel mixture into the engine cylinders during the combustion cycle. Its role is vital in maintaining optimal engine performance by ensuring efficient fuel burning and power output. Designed to factory standards, this intake valve ensures seamless integration with existing parts, maintaining optimal performance and durabili