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
COSCO Extends Strategic Cooperation
At a recent ceremony in China, MAN Energy Solutions signed a framework agreement with COSCO Shipping Heavy Industry Co., Ltd. (CHI) regarding their future cooperation on decarbonisation retrofit projects.
Michael Petersen – Senior Vice President, Head of PrimeServ Denmark – signed the agreement on behalf of MAN Energy Solutions, with Guo Zhiqiang – Deputy General Manager, CHI Commercial Headquarters – doing so for CHI.
Guo Zhiqiang said: “I am pleased to announce that CHI and MAN Energy Solutions, having served shared clients in their respective domains, are now forging a closer collaboration in vessel decarbonisation. Starting today, our integrated one-stop solutions will inject fresh impetus into the green transition of the global maritime industry.”
Petersen said: “This frame agreement facilitates MAN Energy Solutions’ partnership with CHI, one of the largest repair-yard groups in the world. The agreement means that we can join forces on many future projects to ensure the decarbonisation of the existing commercial fleet worldwide. Today, there are some 4,500 vessels globally with the potential to benefit from changing their current bunker fuel to more environmentally-friendly options. We look forward to working with CHI to deliver new decarbonisation solutions to the maritime industry.”
The new framework agreement provides for the retrofitting of existing ships to operation on new alternative fuels like methane, methanol and ammonia – all fuels that can be produced in a sustainable way through power-to-X processes. MAN Energy Solutions will provide advanced engine-retrofit technology and digital energy-efficiency solutions, while CHI will leverage its rich EPC (Engineering, Procurement, and Construction) experience in large-scale ship modification projects.
With five ship-repair yards, CHI has the capacity to repair and modify approximately 1,500 ships annually. This collaboration will integrate MAN PrimeServ’s cutting-edge, dual-fuel engine technology with CHI's repair and modification capabilities to decarbonise the merchant fleet globally.
MAN Energy Solutions views the new agreement as a natural development stemming from the companies’ strong relationship. In this respect, MAN Energy Solutions and CHI are already working together on two major projects for two world-leading container-ship owners.
Documents
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PR COSCO Strategic Cooperation_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
- DE ·
- EN