Main Engine 4-Stroke · Main Engines (4-Stroke)
Regular maintenance and inspections are crucial for ensuring the reliability of the Wärtsilä 7LW46DF engine. Common issues include corroded exhaust valves due to poor fuel quality, which can lead to valve stem breakages. Turbcharger damage is another concern, often resulting from debris caused by faulty exhaust valves or cooling water leaks into cylinders. Cylinder liner wear and scoring require frequent inspections every 4-8 weeks, with measurements of ring coating thickness and groove clamping essential for early detection. Piston crown wear also necessitates regular checks, including measurements of piston crown height and shaft length to determine replacement needs. Continuous monitoring of bearing temperatures in the engine's lubrication and crankshaft systems is vital for preventing failures. This dual-fuel 7-cylinder engine, part of the W46DF family, delivers a robust 4620 kW at 600 rpm, featuring direct fuel injection, turbocharging with charge air cooling, and a total displacement of 96.4 liters per cylinder. It has been in production since 2004 and has accumulated over 7.2 million operational hours, making it a reliable choice for marine applications.
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 7LW46DF — a part, a service call, a second opinion. Are you Wärtsilä? Claim this brand page.
Service engineer? Write the day report for this 7LW46DF 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.