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
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.
Continue reading
Related content
-
MAN L21/31DF-M
The MAN L21/31DF-M methanol GenSet is the first small-bore dual-fuel methanol GenSet in our portfolio.
-
Methanol GenSet
Engineers in Denmark are making shipboard power low-emission with the developing of a four-stroke methanol engine.
Related news
MAN Cryo to Design Hydrogen Supply for Net-Zero Norwegian Ferries
MAN Cryo has been contracted by Torghatten Nord A/S, the Norwegian ferry company, to work on a project encompassing the design and engineering of two hydrogen-powered newbuild RoPax ferries. The project stems from a Norwegian government initiative for major vessels operating on the challenging mainland-Lofoten Islands crossing to become emission-free.
Part of MAN Energy Solutions and a leading expert within engineering solutions for cryogenic equipment for the storage, distribution, and handling of gasses, MAN Cryo will provide the detail design for bunkering systems, hydrogen piping and vent masts for the vessels. Additionally, MAN Cryo will act as system integrator for the hydrogen process plant, coordinating with other major suppliers in the project.
Torghatten Nord A/S previously won the ‘Bodø - Værøy - Røst - Moskenes’ ferry tender in northern Norway. Two new vessels designed by The Norwegian Ship Design Company will be phased into the route with the hulls built by Cemre shipyard in Türkiye and towed to Myklebust shipyard in Norway for outfitting; all hydrogen equipment will also be installed in Norway. Operating on green, compressed hydrogen, both vessels are set for delivery to Torghatten Nord A/S in 2026.
Eirik Olsen, Operational Director Torghatten Nord AS, said: “We are very pleased to have signed this contract with MAN Cryo. By this contract, we have extended our cooperation from LNG to also include hydrogen.”
Gjermund Johannessen, CEO The Norwegian Ship Design Company, said: “We have been working with MAN Cryo on several projects in the past, and we know it as a forward-thinking and solution-oriented company. We look forward to continuing our good collaboration with MAN Cryo and to bring their gas expertise onboard the prestigious hydrogen ferry projects for Torghatten Nord.”
Henrik Malm, Managing Director MAN Energy Solutions Sweden, said: “This new order underscores MAN Energy Solutions' leadership within developing future-fuel systems for the maritime sector. With a strong focus on advanced engineering, tailored design and seamless integration capabilities, our specialist team at MAN Cryo is setting new standards in sustainable marine operations. In this way, we are contributing significantly to 'Moving Big Things to Zero,' testament to our vision for a cleaner, greener maritime future where innovation leads the way in reducing ecological footprints. Torghatten Nord is set to revolutionise ferry transportation with these vessels powered by green hydrogen, which will be a critical step towards achieving zero-emission operation.”
About MAN Cryo
Based in Gothenburg, Sweden, MAN Cryo offers system design and engineering solutions for the storage, distribution and handling of liquefied gases and has a pioneering reputation within the marine sector. It supplied the world’s first LNG fuel-gas system for the ‘Glutra’ ferry in Norway in 1999, while in 2013 it supplied the world’s first LNG bunker vessel – the ‘SeaGas’ – with operations in Stockholm, Sweden. More recently, MAN Cryo has signed its first design contracts for methanol-supply systems and delivered the first liquid-hydrogen fuel-gas system to be installed below deck aboard a ship.
Contact: Kristoffer Lorentsson – Sales & Project Manager, MAN Cryo
kristoffer.lorentsson@man-es.com
Graphical rendering of the newbuilding RoPax (courtesy Norwegian Ship Design). The new ferries will be about 120 m long with capacity for 120 cars and 599 passengers. They will serve a close to 100 km open ocean crossing above the Arctic Circle that is considered Norway’s most challenging ferry crossing
Documents
-
PR MAN Cryo H2__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