Wärtsilä has introduced a new radical derating retrofit solution – Wärtsilä Fit4Power - to extend the emissions-compliant lifetime of merchant vessels by providing the existing two-stroke fleet with leaner, healthier and more optimised engines.

This new advanced retrofit solution enables ship owners to reduce the bore size of two-stroke engines by 25% while significantly improving combustion efficiency, which in turn reduces both fuel consumption and greenhouse gas emissions. For owners, this will improve the efficiency of their existing fleet, ensuring compliance with Carbon Intensity Indicator (CII) regulations, and futureproofing assets against future environmental measures. 

Wärtsilä 2-Stroke Services successfully completed the pilot installation of Wärtsilä Fit4Power onboard a container ship with large-bore two-stroke main engine last year. The results proved that a vessel with this kind of main engine, that is now oversized for today’s operating patterns, can save 2,000 tonnes of fuel and reduce at least 6,000 tonnes of CO2 emissions annually thanks to this retrofit solution. Fit4Power received certificate of product design assessment from American Bureau of Shipping (ABS) in 2022.