Wärtsilä 46F marine engine

Wärtsilä 46F can be run on either heavy fuel oil (HFO), marine diesel oil (MDO), or on light diesel.

Wärtsilä 46F

Best-in-class fuel economy and outstanding power-to-weight as well as power-to-space ratios

The technologically advanced Wärtsilä 46F can be run on either heavy fuel oil (HFO), marine diesel oil (MDO), or on light diesel when being operated within strict coastal or port emissions areas. This fuel switching can take place smoothly and without power interruption across all engine loads. This flexibility enables the operator to select the fuel according to price, availability, and the need to meet local emissions regulations.

The Wärtsilä 46F engine is fully compliant with the IMO Tier II exhaust emissions regulations set out in Annex VI of the MARPOL 73/78 convention.

Key benefits of the Wärtsilä 46F

Proven and reliable heavy fuel technology from an industry leader
Thermal efficiency for complete combustion and minimal exhaust gas emissions
Fuel economy throughout the entire engine operational range, thanks to an efficient twin-plunger fuel injection system, gives significant cost savings
Advanced modular design means fewer components, lower inventory costs, less maintenance, and faster crew training
Extended overhaul intervals provide greater engine availability and reduced operational costs
Embedded automation system for optimal operating efficiencies

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Wärtsilä 46F Product guide and 3D models and drawings

Get technical data and system proposals for designing W46F marine engine installations.

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Press releases

28 Mar 2023 · Press release

Celebrity Cruises’ new Edge-Series ship leads the industry in fuel flexibility with Wärtsilä’s future fuel engine

11 Mar 2021 · Press release

Renewal and expansion of Wärtsilä Optimised Maintenance agreement will enhance fuel efficiency and reduce carbon footprint for Van Oord dredger

19 Jan 2021 · Trade press release

Chinese dredging company sees real value in Wärtsilä service agreement

Adopting methanol as marine fuel

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.

Customer stories

Discover the benefits others have already gained from Wärtsilä 46F engine.

Finnlines' two RoPax vessels

Why was an integrated hybrid solution for two new RoPax vessels the perfect choice to support Finnlines’ long-term decarbonisation goals?
Read about the all-in-one package for zero-emission operation

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