Close-up of waves and splashes of water, capturing the dynamic motion and texture of the sea.

Power through uncertainty

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. 

Top view of merchant vessels sailing

Everllence small-bore portfolio

Everllence (former 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 provide 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. 

 

For the world's merchant fleet

Our portfolio of proven and trusted four-stroke small-bore GenSets and engines is suitable for many different kinds of merchant vessels, and also specific applications. This makes it a perfect choice for power generation, diesel-electric propulsion and propulsion

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More than
20,000
Everllence small-bore engines are in service today
Up to
36,000
h
time between overhauls (TBO) possible
24/7
service with passion across the globe by Everllence PrimeServ

High efficiency

Efficient performance has a measurable effect on both the environment and your bottom line. It also explains why more than 20,000 of our engines are in service worldwide. Our dual-fuel engines let you select the most economic fuel type for the operating conditions. The cost-optimized fuel injection system is also designed for high reliability and cost-efficiency

Top view of container vessel
Engineer working on L21/31DF-M

Key benefits of the small-bore engines

Our small-bore GenSets and propulsion engines are based on proven technology, and offer a wide range of benefits:  

  • Designed for lifelong operational reliability, availability and minimal downtime 
  • Robust design with sturdy engine blocks, stiff crankshafts, and robust connecting rods 
  • Long overhaul intervals  

These key features make all engines of this portfolio a good choice for  shipowners or operators focusing on reliable performance and efficiency

 

Talk to our experts

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. 

Talk to our experts

Two men in business suits are talking.

Future-proof solutions

The main uncertainties affecting engine choice have to do with the environmental and cost factors of fuel. Our answer is flexibility. Our single-fuel engines can run on conventional fuel types and also bio-fuel oils. Dual-fuel engines let you use methane as additional fuel type. The L21/31DF-M and L27/38DF-M can use methanol as second fuel type. Our retrofitting expertise offers flexibility, now and in the future. 

View of port with different fuel tanks

Frequently asked questions regarding the Everllence small-bore engines

What else is there to know about these engines?

Core questions on performance, fuel, and emissions answered.

The small-bore portfolio is suited for nearly all kinds of merchant vessels and also specific applications, such as wind offshore. As GenSets they can provide auxiliary power supply, and they are a perfect match for Everllence B&W two-stroke engines. GenSets can also be used for diesel-electric propulsion.  
The small-bore portfolio also includes a range of trusted and proven propulsion engines for smaller applications, such as tugs and fishing vessels.
Aerial view of many different merchant vessels
The small-bore portfolio also comprises dual-fuel engines, which can run either with methane or methanol. Additionally, many of the engines can be upgraded to dual-fuel operation.
Yes – all our small-bore four-stroke engines are fully compatible with bio-fuels oils.

Discover the full range of Everllence four-stroke small-bore engines

GenSets

Rendering of the 28/32DF engine
L28/32DF GenSet

The dual fuel L28/32DF (former MAN L28/32DF) is available for new builds and economical retrofit solutions. The dual fuel engines offer flexibility with economic and environmental advantages, especially as part of a complete power package.

  • 720 – 750 rpm
  • 1,050 – 1,890 kW
  • 1,000 – 1,800 kWe
Rendering of the 27/38DF-M engine
L27/38DF-M GenSet

The L27/38DF-M (former MAN L27/38DF-M) GenSet is designed for running on methanol, heavy fuel oil (HFO), and most biofuel oils. It delivers exceptional performance across the entire load range, featuring quick acceleration and immediate load response. Long time between overhauls (TBO) are also valid for the L27/38DF-M.

  • 720 – 900 rpm
  • 1,980 – 3,690 kW
  • 1,900 – 3,540 kWe
Rendering of the L27/38 Mk2 engine
L27/38 Mk2 GenSet

L27/38 Mk2 (former MAN L27/38 Mk2) GenSets are designed for operational reliability together with long and safe overhaul intervals. They are a proven solution for a large range of merchant vessels.

  • 720 – 900 rpm
  • 1,980 – 3,690 kW
  • 1,900 – 3,540 kWe
Rendering of the 23/30H Mk3 engine
L23/30H Mk3 GenSet

The Mk3 version of the L23/30H (former MAN L23/30H) GenSet combines innovative technology with proven design principles to meet current and future requirements. With up to 200 kW per cylinder, it is engineered to cater for the power needs of most commercial ship types.

  • 720 – 900 rpm
  • 500 – 1,800 kW
  • 475 – 1,710 kWe
Rendering of the 23/30DF engine
L23/30DF GenSet

The dual fuel L23/30DF (former MAN L23/30DF) is available for new buildings as well as for an economical retrofit solution. The dual fuel engines offer flexibility with economic and environmental advantages, especially as part of a complete power package.

  • 720 – 900 rpm
  • 625 – 1,320 kW
  • 590 – 1,255 kWe

 

Rendering of the 21/31DF-M engine
L21/31DF-M GenSet

This methanol-fuelled L21/31 (former MAN L21/31) GenSet is a compact and reliable power source designed to run on methanol, heavy fuel oil (HFO), and most biofuels.

With its outstanding load-step capabilities and extremely long time between overhauls (TBOs), it is ideal for many different applications. It is also a perfect match for the Everllence B&W ME-LGIM (former MAN B&W ME-LGIM) methanol two-stroke engine.

  • 900 – 1,000 rpm
  • 1,000 – 1,980 kW
  • 950 – 1,880 kWe

 

L21/31 Mk2 GenSet
L21/31 Mk2 GenSet

L21/31 Mk2 (former MAN L21/31 Mk2) GenSets deliver reliable and HFO- / biofuel-based auxiliary power. They operate at the lowest possible accumulated costs during their entire life cycle and therefore represent a safe investment.

  • 900 – 1,000 rpm
  • 1,000 – 1,980 kW
  • 950 - 1,880 kWe

Propulsion engines

Rendering of the L27/38 Mk2 engine
L27/38 Mk2 propulsion

The L27/38 (former MAN L27/38) propulsion engine, with its output range of 2,100 to 3,690 kW, is the perfect power solution for many different kinds of marine vessels.

These include not only small to medium-sized tankers, cargo vessels, ferries, passenger and RO-RO ships, coasters, large fishing boats but also tugs, workboats, and supply vessels.

  • 750 – 900 rpm
  • 2,100 – 3,690 kW
Rendering of the L21/31 engine
L21/31 propulsion

The L21/31 engine is the ideal power source in the 1,290 – 1,935 kW output range for small to medium sized tankers, cargo vessels, ferries, RO-RO vessels, fishing vessels, tugs, workboats, and supply vessels.

  • 1,000 rpm
  • 1,290 – 1,935 kW

Downloads

Get more insights on our small-bore engines

L27-38-Mk2 Propulsion
pdf | 101 KB
L21-31DF-M GenSet
pdf | 112 KB
L27-38DF-M
pdf | 107 KB
L27-38-Mk2 GenSet
pdf | 102 KB
Everllence ExpertTalk

Power through uncertainty 

Our portfolio of small-bore four-stroke GenSets for auxiliary and propulsion applications is constantly evolving to meet the requirements from the maritime industry. Do you want to stay on top of this? Then watch the recording of this Everllence  ExpertTalk. 

Four Stroke Engine
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