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 or III
    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.

    Dimensions (mm) and weights (tonnes)
    Engine type A* A B C D F Weight
    6L46F 8430 8620 3500 2930 3750 1480 97
    7L46F 9260 9440 3800 2950 3750 1480 113
    8L46F 10080 10260 3800 2950 3750 1480 124
    9L46F 10900 11080 3800 2950 3750 1480 140
    12V46F 10080 10150 3770 4050 3800 1820 173
    14V46F 11650 11729 4243 4678 3800 1820 216
    16V46F 12700 12779 4243 4678 3800 1820 233


    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

    Press releases

    Wärtsilä powers the world’s largest cruise ship, ‘Harmony of the Seas’

    by Wärtsilä Corporation | Jun 09, 2016

    Royal Caribbean International’s Harmony of the Seas, featuring Wärtsilä engines, propulsion equipment, exhaust scrubber systems, Wärtsilä NACOS Platinum navigation and dynamic positioning systems, as well as Wärtsilä CCTV systems and various electrical & automation solutions, is now in commercial operation. The ‘Harmony of the Seas’ has also been included in a service agreement between Wärtsilä and Royal Caribbean covering technical management and monitoring under Wärtsilä Genius services. The ship was delivered from the yard on May 12. With a length of 362 metres the ship, which was built at the STX France shipyard in the French port of Saint-Nazaire, is the world’s largest cruise vessel. .

    Wärtsilä has also provided the engines and thrusters to the vessel’s sister ships, the Oasis of the Seas and the Allure of the Seas, thus emphasising the trust and cooperation that exists between Wärtsilä and Royal Caribbean International.

    “Wärtsilä congratulates both Royal Caribbean and STX France on this milestone delivery of the world’s largest cruise ship. We are proud to have been selected to provide a comprehensive scope of Wärtsilä solutions and we wish good luck and success for the vessel throughout its lifecycle,” says Fred Danska, Director, Cruise Business, Wärtsilä Marine Solutions.

    The Harmony of the Seas is powered by four 12-cylinder Wärtsilä 46F engines and two 16-cylinder Wärtsilä 46F engines, featuring best-in-class fuel economy, and outstanding power-to-weight and power-to-space ratios. For effective manoeuvring, the ship has four Wärtsilä CT3500 transverse thrusters

    The two Wärtsilä hybrid scrubber systems represent the world’s biggest marine exhaust scrubber installation so far. They feature the latest in exhaust cleaning technology thus minimising sulphur oxide (SOx) emissions and allowing the vessel to comply with emission control regulations around the world. Wärtsilä hybrid scrubber system solutions have the flexibility to operate in both open and closed loop using seawater to remove SOx from the exhaust.

    The Wärtsilä NACOS Platinum navigation and dynamic positioning systems are a popular choice of cruise ship operators and feature highly advanced integrated navigation technology. Other electrical & automation solutions have been provided by Wärtsilä Funa for this vessel, including a house light dimming system for all public venues, a dimming system for the suites, and a low resolution LED wall for the theatre.

    Link to images
    Caption: The world’s largest cruise ship, ‘Harmony of the Seas, is powered by Wärtsilä.  

    Media contact:

    Ms Marit Holmlund-Sund
    Senior Manager Marketing, Communications, Marine Solutions
    Wärtsilä Corporation
    Tel: +358 10 709 1439

    Wärtsilä in brief:
    Wärtsilä is a global leader in advanced technologies and complete lifecycle solutions for the marine and energy markets. By emphasising sustainable innovation and total efficiency, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers.
    In 2015, Wärtsilä's net sales totalled EUR 5 billion with approximately 18,800 employees. The company has operations in over 200 locations in more than 70 countries around the world. Wärtsilä is listed on Nasdaq Helsinki.


    IMO Tier III and Beyond

    Some years ago, with the end of the Wärtsilä 46 product cycle in sight, Wärtsilä decided to upgrade the engine design.
    28 May 2012
    • Twentyfour7. article

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