Wärtsilä 46F

The Wärtsilä 46F is a four-stroke medium-speed marine engine series from Wärtsilä with an output between 7.5 and 20 megawatts at 600 revolutions per minute, built in configurations from six cylinders in line to sixteen in a V. Wärtsilä sells it as a diesel, dual-fuel, methanol-ready or methanol engine, all able to burn heavy fuel oil, light fuel oil and liquid biofuel, for large ferries, ro-ro vessels and dredgers, and says more than 300 engines have been sold with over seven million running hours. Trade press described the engine when it was introduced as the latest in the engine series launched in 1987 as the Vasa 46, similar in bore and stroke to the original but a new engine with common rail injection and an embedded control system.