Main Engine 4-Stroke · Main Engines (4-Stroke)
Regular maintenance is crucial to ensuring optimal performance and reliability of marine engines. Wärtsilä's 6LW46TS-DF, part of the W46TS-DF family, is a dual-fuel engine designed for high efficiency and minimal emissions. With a power output of 4020 kW at 600 rpm, this L-configured, 4-stroke engine features a bore of 460 mm and a stroke of 580 mm across six cylinders. It operates on LNG/HFO dual-fuel, providing flexibility in fuel choice and meeting IMO Tier III emissions standards without additional exhaust treatment in gas mode. The engine's thermal efficiency reaches up to 52% in gas mode, while its power density is 1,300 kW per cylinder. Common maintenance concerns include monitoring the turbocharger oil pressure and flow, inspecting crankcases for contamination, and checking valve stems for corrosion due to low-quality fuels. Additionally, regular diagnostics of combustion profiles and gas compositions are essential to prevent piston coking and ignition issues in gas mode. The 6LW46TS-DF has been in production since 2022, with its first installation on the Royal Caribbean Utopia of the Seas in July 2024.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
Free of charge — send us your request for Wärtsilä equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Wärtsilä first.
Tell us what you need for this Wärtsilä 6LW46TS-DF — a part, a service call, a second opinion. Are you Wärtsilä? Claim this brand page.
Service engineer? Write the day report for this 6LW46TS-DF in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.