The Wärtsilä 46F is a four-stroke medium-speed engine series. These engines are ideal for many ship types because they offer the widest fuel flexibility in their power range, which is between 7.5 MW and 20 MW at 600 rpm. The engines are available in 6L to 16V-cylinder configurations. Choose Wärtsilä 46F when you want efficient and reliable performance for a demanding marine application.
The Wärtsilä 46F engines are available in these fuel versions:
All versions are suitable for both constant-speed diesel-electric operation and direct drive main engine propulsion.
The Wärtsilä 46F is your best choice when you are looking for the fastest possible uptake of alternative fuels as soon as this becomes viable for you. More than 18 years of operational history and 7,200,000 running hours are proof of its reliability and maximum uptime. Because the Wärtsilä 46F is flexible and cost-effective in operation, it works brilliantly for applications with high power needs. Such applications include the following, for example:
Will adapt to alternative fuels
The Wärtsilä 46F engine series is flexible and can run on many types of fuel, from heavy fuel oil (HFO) to more sustainable alternatives such as bio-LNG and methanol. Because it is flexible, it can adapt to changing regulatory requirements without significant modifications. It is operationally viable for the long term with lower cost of conversion.
Reliable with maximal uptime
The following figures prove that Wärtsilä 46F is rock-solid reliable:
The engines have extended overhaul intervals, which means better greater availability - and money saved. The modular design with fewer components cuts inventory costs, maintenance, and crew training time.
Cuts emissions and complies with regulations
The engines are designed to meet stringent environmental regulations. IMO Tier III compliance is ensured with a selective catalytic reduction (SCR) system in diesel and methanol modes whereas the dual-fuel engine in gas mode is readily IMO Tier III compliant. Because the engines’ thermal efficiency ensures complete combustion which minimises exhaust gas emissions. Their noise levels are reduced. Methanol certifications speed up the adoption of green fuels, which further improves regulatory compliance.
Efficient, with high power density
The series delivers exceptional fuel economy with best-in-class power-to-weight and power-to-space ratios.
Delivers high performance consistently
Delivers 100% of the engine's load – also in methanol mode, providing 1250 kW per cylinder. Achieves high-power output without compromising efficiency or reliability.
The Wärtsilä 46F engine series are based on a common platform. This allows ship owners and operators to decide their own pace of decarbonisation. The platform design leverages our extensive experience with the original Wärtsilä 46F engine since 2007 and with methanol as marine fuel since 2015. There are four engine versions for tailored pathways to a low-carbon future.
Get technical data and system proposals for designing Wärtsilä 46F and Wärtsilä 46DF marine engine installations.
If you are considering a switch to low-carbon fuel, methanol is an attractive option. Green methanol has the potential to be carbon free, and it meets current and future emissions targets in terms of NOx, SOx and particulates.
Discover the benefits others have already gained from Wärtsilä 46F engines.
