After a production agreement reached by Weichai and world No.1 marine diesel engine manufacturer---Germany-based MAN AG, Weichai-MAN L21/31 series marine diesel engines were introduced to China. Adopting the integral rigid design, this series achieve high security. Its cylinder units, which can be easily installed and taken apart, are integrally installed. Adopting the state-of-art turbocharger and dual inter-cooler from MAN AG, this series products pride themselves in their intake performance. What's more, Its SaCosOne security control system from MAN AG fully ensures its reliability. With the capability of burning MGO, MDO and HFO,  Highly powerful and economic, engines used for main propulsion consist of 6, 7, 8 or 9 cylinders with a rotation speed of 1,000r/min and power coverage of 1,290-1,935kW (min. fuel oil consumption: 192g/kWh; lub oil consumption <0.8g/kWh).

This series have passed the International Association Classification Society Certificates of CCS, ZY, ABS, GL, BV, DNV , RS and  LR.

 This series engines are well adapted to various working conditions. It is mainly used as the main and auxiliary engines for ships.

Note: H* is the hoisting height benchmarked at the center of the bent axle.