MAN builds on classic L23/30H for Mk 3 EcoGen

The upgraded genset was introduced in late 2018, and MAN has already received a number of orders for the new iteration. Compared with the Mark 2 variant, the new engine has increased power output of 15%. With the introduction of a new 9-cylinder version, capable of generating up to 1,800kW at 900rpm, the L23/30H range now extends from 500kW to 1,800kW, increasing its appeal to deep-sea vessels.

“The new EcoGen engine meets the requirements of most merchant ships, and because it covers such a range of vessels and power requirements, it is ideal for shipowners and operators with diverse fleets,” Paw Houmann-Poulsen, head of promotion and customer support, Marine Gensets, told the Motorship.

The increased power output offers shipowners the choice of reducing the number of cylinders, reducing weight and fuel consumption, or of selecting an additional cylinder to reduce the engine speed from 900 to 720rpm, which will prolong the time between overhauls by up to a year.

The four-stroke engine design has been updated to meet the energy requirements of shipowners investing in exhaust gas cleansing systems (scrubbers), which can reach as high as 250kW for some larger bulkers operating closed loop scrubbers, or operating on low sulphur fuel.

The engine draws heavily on previous iterations of the reliable MAN L23/30H, which was originally launched in 1965, and was appreciated for its “forgiving” service record. However, a number of design improvements have been made to speed up maintenance, while installation has been simplified.

The time between overhaul remains best in class. The new MAN L23/30H Mk 3 EcoGen engines will also be compatible with MAN’s online service offering.