However, in light of ammonia's particular characteristics, the new engine also has additional safety features such as containment systems, sensors, system ventilation and double-walled piping developed especially for ammonia as a fuel.

Everllence reports that the first ME-LGIA engine is due for delivery in Q1, 2026 with bedding-in set for Q4, 2025. The company is currently engaged in several pilot-projects, including further four engines for Höegh Autoliner PCTCs.

Bjarne Foldager, Head of Two-Stroke Business, Everllence said: "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."

In 2027, Höegh Autoliner will be the first PCTC operator in the world able to run on net-zero ammonia directly from the yard with Everllence engines installed. "We are immensely proud to be the first PCTC company to order these groundbreaking engines for our four upcoming Aurora Class vessels," said Sebjørn Dahl, COO at Höegh Autoliner on LinkedIn. Everllence states that the full sales release of the ME-LGIA will initially feature G50, S50, S60, G60, G70 and G80 bore sizes; retrofit options will also, eventually, be made available.

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