Reliable and efficient four-stroke small-bore engines
Regulatory and fuel-related uncertainty can make it difficult to plan investments in propulsion and GenSets. With our small-bore engines, you are prepared for whatever lies ahead.
MAN Energy Solutions has built its position as the leading designer and developer of small-bore engines for the world’s merchant marine fleet on the basis of high reliability and efficiency.
Thanks to the low maintenance requirements, our engines provides extended lifetime, and additionally offer long time between overhauls (TBO). When needed, our service experts are there for you – every day and everywhere around the world.
MAN small-bore engine portfolio for the world’s merchant fleet
across the globe
Key benefits
Full range of MAN four-stroke small-bore engines
Explore the capabilities and range of our engines.
GenSets and Diesel-electric propulsion
MAN L28/32DF GenSet
Based on the ultra-reliable and robust MAN 28/32H, the dual-fuel version is available as newbuild or retrofit and adds the ability to run on methane, with its economic and environmental advantages. High efficiency in gas and diesel mode makes it a perfect GenSet as part of a complete power package with four-stroke or two-stroke propulsion engines. Easy operation, easy maintenance and proven reliability also make it a trusted propulsion engine with long times between overhauls and low life cycle costs.
- 720 – 750 rpm
- 1,050 – 1,890 kW
- 1,000 – 1,800 kWe
MAN L23/30H Mk3 GenSet
By applying innovative technology to classic design principles, the MAN L23/30H Mk3 is engineered to meet the power needs of most commercial ship types. Straight forward integration requirements make it a perfect choice for low-cost installation, while well-known maintenance procedures and common spare parts reduce operating costs. The new model raises power output per cylinder by 15-20% and reduces fuel oil consumption.
- 720 – 900 rpm
- 500 – 1,800 kW
- 475 – 1,710 kWe
MAN L23/30DF GenSet
The MAN L23/30DF dual-fuel GenSet lets you select the most economic fuel for the operating condition. The cost optimized fuel injection system is designed for high reliability and cost-efficiency. It uses the main injection valve to inject pilot oil. This way, separate injectors, piping and pumps for main oil and pilot oil or a common rail system are not needed, saving on installation costs and maintenance. The monocoque design also eases the installation of the engine series and reduces weight.
- 720 – 900 rpm
- 625 – 1,320 kW
- 590 – 1,255 kWe
This methanol-fuelled engine is a compact and reliable power source designed to run on methanol, heavy fuel oil (HFO), and most bio-fuel oils. When powered by green methanol, it is carbon neutral. The new engine type maintains the reliability and low consumption of the proven MAN 21/31, ensuring security of power supply on large vessels and handling load steps with confidence.
- 900 – 1,000 rpm
- 1,000 – 1,980 kW
- 950 – 1,880 kWe
Propulsion engines
The robust and reliable MAN L27/38 delivers good performance over the entire load range with quick acceleration and immediate load response. Its proven reliability ensures long time between overhauls (TBO) and no unscheduled maintenance or repair work.
This engine is available as methanol-ready version.
- 750 – 900 rpm
- 2,100 – 3,690 kW
MAN L21/31 propulsion
The MAN L21/31 engine combines intelligent use of fuel in marine applications with flexible propulsion systems. It is the ideal power source, for example, for small to medium-sized tankers, cargo ships and ferries.
The proven engine is characterized by its reliability and low consumption.
This engine is available as methanol-ready version.
- 1,000 rpm
- 1,290 – 1,935 kW
Plan your vessel with confidence
Get in touch with our four-stroke small-bore experts for in-depth advice on all your propulsion and GenSet questions. Start your change process now and reach out to us today.
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MAN L21/31DF-M and MAN L27/38DF-M
Discover our methanol-fuelled small-bore engines: MAN L21/31DF-M and MAN L27/38DF-M.
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Methanol GenSet
Engineers in Denmark are making shipboard power low-emission with the developing of a four-stroke methanol engine.
Related news
MAN L35/44DF CD GenSet Passes Type Approval Test
MAN Energy Solutions has announced the successful Type Approval Test (TAT) of its dual-fuel MAN L35/44DF engine for application as auxiliary GenSet and electric propulsion at constant speeds, respectively, of 720 and 750rpm. The TAT involved the testing of both 35/44DF variants, namely the methane-capable 35/44DF CD and the methanol-ready 35/44CD.
Testing took place from April 7 – 11 at the Changwon headquarters of STX Engine in South Korea with the participation of six classification societies.
The L35/44DF CD engine is an upgraded version of the L35/44DF CR engine, first launched in 2015. Among other features, it comes equipped with an ACC (Adaptive Combustion Control) system that monitors the state of combustion in real time for optimal fuel-injection conditions.
Alexander Knafl – Senior Vice President, MAN Energy Solutions – said: “We have worked closely with STX over the past three years in developing the MAN 35/44DF CD. We anticipate it having broad appeal, especially among container vessels and LNG carriers. In addition to its strong output, other advantages of the MAN 35/44DF CD include its effective reduction of methane slip and its future-fuel readiness for methanol and other fuel types.”
Sephardim Koblenz – Vice President and Head of Licensing, Four-Stroke Marine & License – MAN Energy Solutions, said: “The 35/44DF CD is a future-proof concept with all the latest technology, including full connectivity and cyber security. The 35/44DF CD’s reliability, fuel efficiency, low methane-slip and cost optimisation are also crucial to the engine’s resumé. In developing this engine together with our partner, STX Engine, we furthermore had low cost and easy localisation as clear targets.”
The new GenSet aims to reduce ship owners’ capital expenditure (CAPEX) and operating costs (OPEX), while remaining relevant for the coming decades. The MAN 35/44DF CD dual-fuel engine is based on the proven MAN 35/44DF CR and MAN 32/44CR engines whose performance has been fully verified over the years through millions of operational hours. MAN Energy Solutions reports that the MAN 35/44DF CD features minimal greenhouse-gas emissions and that, compared with industry standards, it can reduce methane slip by up to 85%.
Documents
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PR 35.44DF TAT_EN
Contact
Nils Søholt
Trade Press Marine
Group Communications & MarktingMAN Energy SolutionsTeglholmsgade 412450 Copenhagen SVDenmark
nils.soeholt@man-es.com t +45 33 85 26 69Available languages
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