Main Engine 4-Stroke · Main Engines (4-Stroke)
The 6AYEM-ST is the lower continuous-rated sibling of the 6AYEM-ET, sharing the same common-rail 20.38 L block but rated 485 kW at 1900 rpm rather than 599 kW. It is EPA Tier III certified, uses the same constant high-temperature cooling system with optional dual-circuit keel cooling, and shares the YXH-240-7 marine gearbox.
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 Yanmar equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Yanmar first.
Tell us what you need for this Yanmar 6AYEM-ST — a part, a service call, a second opinion. Are you Yanmar? Claim this brand page.
Service engineer? Write the day report for this 6AYEM-ST 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.