Everllence has announced the full-scale testing of its 12-cylinder 175DF-M dual-fuel methanol engine at the company’s Test and Research Center in Frederikshavn, Denmark.

Sales and Business Development Manager at Everllence, Florian Keiler,  said: “We are encouraged by the results achieved by the 175DF-M and look forward to supporting superyacht, tug, offshore, governmental and passenger-vessel applications.”

“Together with our customers, we aim to develop practical and efficient solutions for maritime decarbonization,” added Keiler.

The company said that, after optimizing the 175DF-M (Dual-Fuel Methanol) concept on a single-cylinder test stand in 2025, this first full-scale test campaign validated operation in both diesel and methanol modes.

Everllence stated that the 175DF-M is designed to achieve its highest efficiency at more than 95 percent methanol share in a wide load range for its variable speed variant, while utilizing a low-pressure port-fuel-injection (PFI) system.

This approach enables simpler fuel-supply arrangements, reduced system complexity, and lower installation costs, it said in a press release.

In addition, the engine’s design supports straightforward retrofitting with high parts communality, offering shipowners the flexibility to transition towards carbon-neutral operation when required.

The company reports that it has already secured the first commercial orders for the high-speed engine, with 12V and 16V175DF-M variable-speed gensets scheduled for delivery in mid-2027 to two different superyacht customers.

Everllence considers the 175DF-M a key strategic pillar of its commitment to supporting the shipping industry’s transition to lower-carbon operations.

Image: Everllence’s 175DF-M engine