Wärtsilä Equipment
Wärtsilä Marine Diesel Engines
Wärtsilä medium-speed marine diesel engine portfolio (W20, W25, W31, W32, W46F) from 0.7 to 20 MW for main propulsion and auxiliary power; IMO Tier III via Wärtsilä NOx Reducer SCR.
Description
Wärtsilä marine diesel engines are medium-speed engines for main propulsion and onboard power, designed for fuel flexibility and efficiency across real operating loads.
Key facts
- Power range from 0.7 MW to 20 MW
- Suitable for diesel-mechanical, diesel-electric and hybrid installations
- IMO Tier III compliance in diesel operation via SCR (Wärtsilä NOx Reducer, NOR)
Engine types
- Wärtsilä 20 – compact, lightweight engine with a long service record; auxiliary power (e.g. PCTC car carriers) and main propulsion for tugs and smaller OSVs
- Wärtsilä 25 – compact, modern engine covering a broad power range; propulsion and auxiliary power for short-sea merchants, PSVs and LNG bunker vessels, including hybrid propulsion
- Wärtsilä 31 – best fuel economy in its class and low noise; main propulsion for cruise ships, ferries, fishing vessels and merchants
- Wärtsilä 32 – robust engine for continuous heavy-duty operation; drill rigs, dredgers and tugs
- Wärtsilä 46F – high power density and wide fuel range; main propulsion for large ferries and ro-ro vessels
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