“ When existing vessels retrofit to new alternative e-fuels like methanol or ammonia, CO₂ emissions can decrease by more than 90% ”
Klaus Rasmussen, Project Sales Director
Dual-fuel conversions for marine applications
For decades, Everllence engines have been the backbone of the marine industries. Times are changing fast, which is why we are supporting our customers’ journey to decarbonization with cost-effective dual-fuel conversions that deliver performance and flexibility only the original engine designer can provide.
Marine two-stroke
Increasingly strict limits on two-stroke vessel emissions have given rise to new solutions for greener maritime operations. For example, E-fuels have now become a truly viable bunker fuel option, paving the way for dual-fuel systems that meet environmental legislation.
LNG, ethane, and LPG fuels reduce air pollution significantly while methanol has a net-zero CO₂ emission footprint. And with green ammonia coming to the market, you will be able to switch to 100% carbon-free fuels with Everllence.
Since any Everllence ME-C engine with a bore size of at least 50 can be converted for dual-fuel operation, more than 4,500 vessels could potentially be retrofitted to run on new alternative fuels like LNG, ethane, LPG, methanol and ammonia. This includes the ability to convert a conventional diesel engine to LNG, enabling significantly cleaner operation without replacing the entire system.
Learn more about how we can support your dual-fuel conversion and how to drive greater efficiency and profitability from your fleet.

We provide a complete two-stroke dual-fuel conversion package, including:
- Research and development
- Engineering
- Site survey
- Engine hardware
- Fuel gas supply system
- Installation supervision
- Testing and commissioning
- Project management

Having completed many dual-fuel conversion projects for two-stroke marine engines, Everllence PrimeServ can support your project and unique needs.
- Contract signature
- Production process (up to 18 months)
- Retrofit engineering
- Manufacturing
- Shipment
- Vessel in shipyard (60-80 days)
- Installation
- Commissioning, tests/ trials
- Handover
- Engine certification

Marine four-stroke
Everllence PrimeServ is focused on helping you to leverage greater value from your four-stroke assets, today and for the future. Our dual-fuel conversions not only enable more sustainable and efficient propulsion and power generation at sea, but they will help you to stay compliant with international regulations. Dual-fuel conversion packages from Everllence PrimeServ range from the straightforward conversion of the main engine to turnkey solutions that include the gas systems. Our highly experienced teams are ready with the expertise and hardware to support you at every step, from initial conversation to final handover. As the original designers of your engine, you can trust us to deliver performance and reliability your business can depend upon.

How you benefit from four-stroke dual-fuel conversions:
- Switch between gas and liquid for full flexibility
- Possible back up from gas to fuel oil
- Reduce SOₓ to near zero, NOₓ by 80%, and CO₂ by 20%
- Cut fuel and operational costs
- Fast ROI plus extended service life of components
- Comply with environmental regulations, ensuring access to local ports and harbor

Having completed many dual-fuel conversions for four-stroke marine engines, Everllence PrimeServ knows exactly how to keep everything on schedule and on budget. Whether converting your diesel engine to LNG or planning a full dual-fuel retrofit, we ensure timely delivery and long-term reliability.
- Contract signature
- Production process (12-14 months)
- Retrofit engineering
- Manufacturing
- Shipment
- Vessel in shipyard (30-60 days)
- Installation
- Commissioning, tests/ trials
- Handover

“ If you don’t comply, you can’t operate. Many other methods to reduce emissions will never go as far as using alternative fuels. ”
Bernd Siebert, Head of Retrofit & Upgrades
LPG: A Scalable Solution for Sustainable Shipping
LPG presents a compelling alternative fuel for the maritime sector, offering strong environmental advantages, global availability, and reliable performance.
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Contact our experts
Ready to convert?
If you are looking for the best partner for your dual-fuel conversion projects, you have come to the right place. As the original designers, we have a better understanding of your engines than anyone else, with the expertise and next-gen hardware ready now to fuel your journey towards decarbonization.
