900-4000 kW output at 720-1000 rpm.

The Wärtsilä 25 engine range was built between 1987 and 1999 as a higher-output version of the earlier F30. Originally to be branded as Nohab F40, its naming was aligned to the Wärtsilä principles. The Wärtsilä 25 was available in a 6-cylinder inline version as well as 8-, 12- and 16-cylinder V-engines. There was also a WN25F version, designed specifically for use in nuclear power plants.

• Water-cooled, four-stroke engines with direct fuel injection.
• Turbocharger and charge air cooler.
• Cylinder heads with four-valve technology.
• Available in versions for LFO, MDO and HFO (max 180 cSt)

• Low NOx EIAPP Tier 1 upgrade available.
• SOLAS upgrade packages available.
• High reliability of the engine.
• High power-to-weight ratio.
• Compact design (suitable for offshore applications)
• Low lube oil and fuel consumption.
• Available in nuclear-approved F version.

Product Support Manager: Jan Kanis
Mobile phone number: +31 645 638 693