Main Engine 4-Stroke · Main Engines (4-Stroke)
The Weichai WD615-6L is a medium‑speed (1500 rpm) 6‑cylinder, L‑configuration trunk‑piston diesel engine delivering about 228 kW on MDO, designed for main propulsion in small to medium vessels. As a Main Engine (4-Stroke Trunk Piston), it is normally installed in the main engine room as a propulsion prime mover connected directly or through reduction gearing to the propeller or propulsion system. In that role, its primary purpose is to convert fuel energy into mechanical propulsion power using a trunk-piston four-stroke cycle. Compared with a two-stroke crosshead engine, a four-stroke trunk-piston engine combines piston and connecting-rod motion directly at the crankshaft and typically operates at higher rotational speed. For exact ratings, dimensions, settings, capacities, materials and variant-specific limits, refer to the manufacturer documentation for the exact figure.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
What our service work and the manufacturer documentation say about keeping this model running.
Trend oil pressure, coolant temperature, exhaust temperatures, load balance, vibration and crankcase condition. Inspect fuel equipment, filters, coolers, valves, turbocharger, mounts and safety shutdowns according to the maintenance plan. Investigate persistent cylinder imbalance, oil debris or coolant leakage promptly. Refer to the manufacturer documentation for the exact figure for valve, bearing, injection and wear limits.
Carry fuel and oil filters, injector service parts, valve-train and gasket items, cooling-system seals, sensors, belts where fitted and critical bearing or turbocharger consumables.
Free of charge — send us your request for Weichai equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Weichai first.
Tell us what you need for this Weichai 6LWD615 — a part, a service call, a second opinion. Are you Weichai? Claim this brand page.
Service engineer? Write the day report for this 6LWD615 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.