Wärtsilä 20

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Wärtsilä 20

The Wärtsilä 20 has proven its robustness and reliability with over 6000 engines delivered since its introduction to the market in the early 1990s. The engine can switch from MDO to HFO and vice versa without power interruption at any engine operation load.

The Wärtsilä 20 engine is fully compliant with the IMO Tier II exhaust emissions regulations set out in Annex VI of the MARPOL 73/78 convention.

Key benefits

  • Exellent fuel flexibility allowing operation on HFO, LBF, MDO and ultra low sulphur fuel. Low fuel oil consumption over a wide load range.
  • Utmost power-to-weight and power-to-space rations in combination with great flexibility in engine support arrangements allow optimised rigid or flexible installation for a wide range of vessel applications.
  • High reliability and proven in service makes the Wärtsilä 20 an excellent choice for any application.


The Wärtsilä 20 can be installed as prime mover for smaller applications like small cargo vessels, small tankers, ferries, Fishing vessels, tug boats and Offshore supply vessels and as Auxiliary engine in vast range of applications.

Wärtsilä 20 Product guide and 3D models and drawings

Get technical data and system proposals for designing W20 marine engine installations.

Wärtsilä 20
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    Delivered in 2007, the Jeddah 41 is a 37m Multi Purpose Escort Tug with a 58 tonnes bollard pull. It was designed by Wärtsilä Ship Design to perform escort service, towing and fire fighting.

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    The MPV Hirta, launched in 2008, has a diesel electric propulsion system comprising three Wärtsilä 9L20 engines driving a reduction gear and a controllable pitch propeller.

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  • Samar

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