Main Engine 4-Stroke · Main Engines (4-Stroke)
The Wärtsilä 7LW64 is a 7‑cylinder, low‑speed four‑stroke trunk piston main engine delivering about 12 740 kW at ~333 rpm, distinguished by its large bore (640 mm) and long stroke (900 mm) L‑series optimized for geared propulsion.
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