226B series marine diesel engine is a modified model, which is developed, according to the relevant national standards and ship regulations, through making improvement on the combustion system, intake an exhaust system, cooling system, PTO system and engine monitoring system on the basis of assimilating foreign advanced technology. This model boasts wide power and speed range, small size and weight, impact structure, reliable operation, advanced economic and technical targets as well as convenient installation. It is mainly used as the main engine or the auxiliary engine of the ship.