Description

Yanmar OEM O-ring (part #24321-000650), 2mm cross-section × 65.0mm inner diameter. Genuine sealing ring for heat exchanger end caps, raw water pump housings, thermostat covers, and similar medium-bore cooling system connections on Yanmar marine diesel engines. Lubricate lightly with clean coolant or engine oil before installation; ensure the ring seats fully in the groove without twisting. Do not reuse once removed. Verify fitment by engine model and part diagram before ordering.