Everllence 4-stroke engine: now available

First unit due for delivery early 2026

Click to learn more. Everllence has launched its new four-stroke, ammonia dual fuel engine this month, ahead of the first units being delivered to shipyards next year. Source: Everllence.

Everllence has launched its new dual-fuel ME-LGIA (Liquid Gas Injection Ammonia) engine at an industry event in Copenhagen, ahead of the first units being delivered next year. The engine design builds on success in Everllence’s other alternatively-fueled engine lines: the ME-LGIM and ME-LGIP units that run on methanol and LPG respectively. Addressing safety concerns around the use of ammonia as fuel, the new engine includes additional safety features such as containment systems, sensors, system ventilation and double-walled piping developed especially for using ammonia. Everllence also reports that the engine will have digital connectivity to allow for real-time shore-based monitoring. Sales of new build ME-LGIA units will initially feature G50, S50, S60, G60, G70 and G80 bore sizes and retrofit options will eventually be made available.

The first ME-LGIA engine is due for delivery in Q1 next year with bedding-in to occur imminently. Everllence is currently engaged in several deployment projects for the new engine, including: two Very Large Ammonia Carriers (VLACs) for Eastern Pacific Shipping, four engines for Höegh Autoliner Pure Car and Truck Carriers, and another for a bulk carrier in Japan where the engine is currently on the MITSUI E&S testbed.

As the maritime industry’s leading engine designer, we are in a unique position to advance the green transition and know that bringing new fuels to market is not just innovation – it’s imperative for zero-carbon shipping. In this context, ammonia is a vital piece of the puzzle. The development of this engine is not just a technical achievement; it is another concrete step towards a climate-neutral future where the time to act is now.

Uwe Lauber, CEO Everllence in his organisation’s official press release, 13 Nov 2025

This ammonia engine is truly a technological milestone. It is the result of over 150,000 hours of collective work and represents a significant financial investment on our part. Since two-stroke engine testing on ammonia started in July 2023, we have carried out over 800 tests – both here in Copenhagen and at MITSUI E&S in Japan. All the way through, safety has been our first consideration and we have worked closely with the relevant authorities and classification societies to ensure that the technology meets all demands. Combined with the knowledge we will gather from the pilot-projects, we are confident that this responsible approach will ultimately deliver the market gold-standard in ammonia engines with a final design based on operational experience. Furthermore, these engines will be digitally connected to optimise operational performance.

Bjarne Foldager, Head of Two-Stroke Business in his organisation’s official press release, 13 Nov 2025

Everllence (formerly MAN Energy Solutions) has been presenting its ammonia four-stroke engine to Ammonia Energy audiences since 2018.