23-30_GenSetMAN GenSets are delivered as complete packages with the diesel engine and the alternator fitted on a common base frame. Any type and make of alternator can be specified, and the base frame can be adapted in each case.
Installation is easy, as the engine and the alternator are fitted on a single base frame, and connection to external systems is trouble-free. The GenSet is delivered in a ready-to-start state, speeding up the installation and commissioning process.
Economic advantages
Like all our units, the L23/30H Mk 2 is designed to perform optimally while running on HFO. 
With an interval of 16,000 hours between major overhauls and a short daily maintenance schedule, the L23/30H Mk 2 has low maintenance requirements. In common with all MAN GenSets, the L23/30H Mk 2 series has low fuel oil and lubricating-oil consumptions and meets all existing emission requirements, including IMO Tier II requirements. The L23/30H Mk 2 also holds the valuable EPA Tier II approval for its 900 r/min version.

Basic design
First introduced in the mid-‘60s, the L23/30H has proven to be an extraordinarily reliable engine type with more than 12,000 units installed and has served as the de facto benchmark for the entire industry. Its monoblock engine frame and underslung crankshaft restrict combustion and inertia forces to within the same component, enhancing the engine's reliability, durability and availability. Among other design improvements, the recent L23/30H upgrade reduced the engine’s weight by 5-7%, increased cylinder output by circa 10%, and reduced fuel consumption (SFOC) by 1%.


Generally speaking, the L23/30H Mk 2 is a four-stroke in-line engine that can be delivered in 5 to 8-cylinder versions. Power output ranges from 650 to 1,400 kW.
The L23/30H Mk 2 is compact and also has a low dismantling height, making it suitable for areas in which vertical space is restricted.
Its turbocharger has a high-efficiency design with a radial flow gas turbine and a radial flow compressor. A built-in lambda controller greatly increases the unit’s load response ability and limits the fuel oil index during the start-up procedure and load changes. It reduces the formation of smoke and results in better fuel utilization and cleaner exhaust. Furthermore, the engine operating system (mechanical governor) allows load steps of up to 50% in one step.