WD618 series diesel marine diesel engine is developed from WD615 series diesel engine by enlarging the stroke. According to the request of marine engine and the national standard, we have developed WD618C series marine diesel engine. Its main spare parts and components are global purchased. It has the advantages of large power storage, low fuel consumption, low emission, high reliability, easy to operate and convenient to maintain. It is suitable for various ships with the power range from 176kW to 275kW, and speed range from 1500rpm to 2150rpm. The engine can match with gearbox of MB270A, 300 and D300 with ratio of 2:1 to 7:1.