Main Engine 4-Stroke · Main Engines (4-Stroke)
The MaK 9LM20 is a medium‑speed, 9‑cylinder L‑configuration trunk‑piston main engine that can run on heavy fuel oil, marine diesel oil or liquefied natural gas, delivering about 1 665 kW at around 1 000 rpm.
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 MaK (Caterpillar) equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, MaK (Caterpillar) first.
Tell us what you need for this MaK (Caterpillar) 9LM20 — a part, a service call, a second opinion. Are you MaK (Caterpillar)? Claim this brand page.
Service engineer? Write the day report for this 9LM20 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.