Dual fuel engines

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Wärtsilä Dual fuel engines - Future-proofing your investment

Wärtsilä dual fuel engines allow ships to be operated on either LNG or conventional liquid marine fuels, including LFO, HFO or liquid biofuel. Using LNG instantly and drastically reduces CO2, NOx, SOx and particulate matter emissions. LNG is also well-established as a maritime fuel around the world, with mature legislation frameworks and robust bunkering infrastructure.

The switch between fuels can be made seamlessly without loss of power or speed. Such fuel flexibility enables compliance with emission regulations in controlled areas, while giving operators the option of determining the fuel according to cost and availability.

Wärtsilä engines are a future-proof investment – whatever fuel the future holds, Wärtsilä’s engines will be able to handle it.

A Wärtsilä engine is born at our Vaasa factory

Watch how one of our engines are built. 

Customer reference

  • Orion reference

    Offshore construction vessel Orion

    The world’s first LNG fuelled offshore construction vessel being built for DEME will be powered by Wärtsilä.

    Read more
  • Viking-Prince-small-slide

    Viking Prince

    Running on environmentally friendly <br>LNG dual-fuel engines

    Read more about Viking Prince
  • Knutsen-LNG-carriers

    Compact Reliq for Knutsen LNG carriers

    BOG reliquefaction simplified with the new Compact Reliq

    Read more
  • Harvey-gulf-small-slide

    Harvey Gulf

    Wärtsilä integrated LNG system for six LNG offshore vessels

    Read more
  • Swift-reference-slide-Wärtsilä

    Swift Drilling

    VSAT installation for Swift Drilling rig enables uninterrupted operations

    Read more about Swift Drilling


Gas Valve Unit
16 MAY 2017 Article
5 min read

The Wärtsilä Gas Valve Unit Enclosed Design (GVU-ED™) for marine applications

Wärtsilä’s dual-fuel engine technology is widely recognized as an...
Modularisation hand in hand with manufacturability
29 MAY 2018 Article
5 min read

Modularisation hand in hand with manufacturability

The development of the new Wärtsilä 31 engine provided the perfect opportunity to exploit the...
Dual fuel engines hero image
26 APR 2017 Article
25 min read

Common rail fuel injection rules the waves

Very few marine engines are awarded a Guinness World Record. Thanks to Wärtsilä’s common rail injection...

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