Wärtsilä 46F

Best-in-class fuel economy & 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.

    Technical Data
    Wärtsilä 46F IMO Tier II
    Cylinder bore 460 mm Fuel specification:
    Piston stroke 580 mm Fuel oil 700 cSt/50oC
    Cylinder output 1200 kW/cyl 7200 sR1/1000 F
    Speed 600rpm ISO 8217, category ISO-F-RMK 700
    Mean effective pressure 24.9 bar L engine SFOC 171 g/kWhat ISO condition
    Piston speed 11.6m/s V engine SFOC 170 g/kWh at ISO condition
    Option: Lubricating oil module integrated on engine.
    Rated power
    Engine type kW
    6L46F 7 200
    7L46F 8 400
    8L46F 9 600
    9L46F 10 800
    12V46F 14 400
    14V46F 16 800
    16V46F 19 200
    Dimensions (mm) and weights (tonnes)
    Engine type A* A B C D F Weight
    6L46F 8430 8620 3500 2930 3750 1430 97
    7L46F 9260 9440 3800 2950 3750 1430 113
    8L46F 10080 10260 3800 2950 3750 1430 124
    9L46F 10900 11080 3800 2950 3750 1430 140
    12V46F 10080 10150 3820 4050 3800 1620 173
    14V46F 11650 11729 4243 4678 3800 1620 216
    16V46F 12700 12779 4243 4678 3800 1620 233


    Wärtsilä UNIC

     Wärtsilä engines are delivered with the UNIC embedded engine management system.

    The UNIC system is designed to ensure extended lifetime for large marine diesel and gas engines operating in the toughest of conditions. Special attention has been paid to temperature- and vibration endurance throughout the design, while the highest priority has been given to operational reliability.

    Key features of the UNIC system include the engine safety system, local monitoring, speed control with loadsharing, fuel injection- and timing control, knock detection, alarm signal acquisition, start/stop sequencing, load reduction request, system diagnostics, and a fieldbus interface as applicable for each engine configuration.

    Thanks to the electronic control, the engine can be adapted to different operating conditions. Furthermore, the pre-tested configuration allows the engine or generating set to be made ready for operation with a minimum of commissioning and installation work.