Wärtsilä 31

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Wärtsilä 31

Designed to set a new benchmark in efficiency and overall emissions performance

The Wärtsilä 31 is available in 8 to 16 cylinder configurations and has a power output ranging from 4.7 to 9.8 MW, at 720 and 750 rpm. The launch of the Wärtsilä 31 introduces a 4-stroke engine having the best fuel economy of any engine in its class. At the same time, it maintains outstanding performance across the complete operating range. Its modular design enables a significant reduction in maintenance time and costs, thereby improving power availability and reducing the need for spare parts.

Wärtsilä 31 is recognised by Guinness World Records as the world's most efficient 4-stroke diesel engine.

Key benefits

The Wärtsilä 31 retains its high efficiency and environmental values throughout the entire lifecycle of the vessel.

  • Lowest fuel consumption over a wide operating range.
  • Highest cylinder power in its segment, 610 kW/cylinder.
  • Available in Diesel, Dual Fuel (DF) and Pure Gas (SG) versions.
  • Meets the coming IMO Tier 3 regulations when operating on gas, and with an SCR when using diesel fuel. The SCR has a minimal effect on fuel consumption.
  • Reliability guaranteed through extensive validation and Wärtsilä’s vast manufacturing experience.
  • Supported by Wärtsilä’s extensive global service network.

Applications

The Wärtsilä 31 is designed to be suitable for a broad range of ship types and applications, both as a main propulsion engine and in diesel electric configurations, or as an auxiliary engine. It can be optimised for running either at constant speed or along a propeller curve. In the Offshore sector, the Wärtsilä 31 is a perfect solution for OSV´s and drilling or semi-submersible vessels, where operational flexibility, high power density, long intervals between overhauls, and high levels of safety are of paramount importance.

Wärtsilä 31 Product guide and 3D models and drawings

Get technical data and system proposals for designing W31 marine engine installations.

Wärtsilä 31

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