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Minimize operating costs with the upgraded MAN B&W ME-GI Mk. 2

The upgraded MAN B&W ME-GI Mk. 2 two-stroke dual-fuel LNG engine improves on one of the industry’s most trusted platforms to deliver even greater operational efficiency for large merchant marine vessels.

The new engine builds upon many of the features that made ME-GI one of the most trusted names in dual-fuel engine design. The simplified design, exceptionally low methane slip, and key component upgrades improve reliability, while providing a large degree of flexibility for meeting emissions regulations. 



Built for low OPEX

Perfect for new builds or retrofits, the MAN B&W ME-GI Mk. 2 minimizes operating costs by delivering the same industry-leading thermal efficiency no matter which fuel you are using. This is a huge advantage, especially for container vessels in a market where fuel prices are fluctuating, and LNG bunkering will become the norm.


Statements and latest news

Some words about the high reliability of the ME-GI engine


Some words from our dual-fuel customers:
Cylinder condition and ist relevance for reliability


Some words from our dual-fuel customers:
Experiences from our first ME-GI customer Teekay


Key features

two-stroke MAN B&W engine
  • Proven two-stroke MAN B&W engine technology
  • Minimal environmental impact (Low GHG emissions by negligible methane slip and reduced CO2 emissions)
  • No need to compensate with liquid oil fuels in order to accommodate low methane number or high ambient temperatures
  • Flexible operation using fuel oil or LNG
  • Knocking is not an issue
  • Any fuel-oil/gas ratio can be burned
  • Supports WHR
  • Easy retrofit compared to Otto cycle engines



The ME-GI is built for low OPEX, delivering the same industry-leading thermal efficiency no matter which fuel you are using. This is a huge advantage in a market where fuel prices are fluctuating and LNG bunkering will become the norm. The auxiliary equipment costs have been reduced and the engine’s installation is simplified. Furthermore, key components have been updated to improve performance and deliver a more environmentally friendly solution.

Component upgrades


The MAN B&W ME-GI Mk. 2 incorporates a range of key component upgrades that improve reliability, maximize efficiency and lower OPEX, helping you to stay competitive in a challenging market.

  • Lowest gas consumption of any marine two-stroke engine
  • Simplified piping system provides a more compact solution with fewer components, and therefore lower maintenance costs
  • New gas block with an improved window valve enables cut-out of an individual cylinder operating on gas, while allowing continued operation on fuel oil
  • Updated pilot oil injection system enables the pilot oil consumption to be lowered to just 0.5% for G70ME-C-GI engines
  • Optional compact pump vaporizer unit features embedded redundancy (3 x 50%) and integration with the ME-GI engine control system 
Pilot oil consumption has been reduced down to 0.5% for G70ME-C-GI engines
For the complete two-stroke engine program, we guarantee a methane slip of 0.2 g/kWh with a tolerance of +/- 0.1 g/kWh for ME-GI engines. For part-load figures of methane slip, please refer to CEAS.
Highest flexibility in dual-fuel operational range (5%-110% load)

Next generation performance and efficiency

Explore your options

The new MAN B&W ME-GI Mk. 2 two-stroke dual-fuel engine is built to support your power needs today and for the future.
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Service solutions for optimum cost-efficiency

MAN PrimeServ offers advanced modernization solutions to optimize the reliability, availability, and economic efficiency of existing equipment. Furthermore, MAN's modernization and retrofit solutions are tailer-made to customers specific applications and machinery. 
Go to MAN PrimeServ

Related products

Did you miss our latest MAN ExpertTalk about methane slip reduction technologies for two-stroke engines? 

Sign up for the recording and find out more about the issue of methane slip which needs to be resolved in order to realize the full potential of LNG as a marine fuel.

This session will provide you with info about the methane slip of the MAN B&W ME-GI and ME-GA engines, from a technical and environmental perspective.

Get insights reg. the origin of methane slip and available MAN mitigation technologies.

 Go to recording