Main Engine 4-Stroke · Main Engines (4-Stroke)
This 9LW25SG engine utilizes a 4-stroke design, burning LNG (Spark-Ignited) to generate power. Manufactured by Wärtsilä, the 9LW25SG boasts a power output of 1530.0 kW. Its configuration is a 'L' type, featuring 9 cylinders, a bore of 250 mm, and a stroke of 350 mm. This engine operates at a speed of 1000 rpm. The Wärtsilä 9LW25SG is designed for flexible operation, capable of utilizing Diesel, LNG (Standard DF/NextDF), and Ammonia (NH3) as fuel. The engine's 'TBO' (Time Between Overhaul) can reach up to 32,000 hours. It achieves IMO Tier III compliance natively in LNG mode, and with NOR (NOx Reducer) in Diesel/NH3 mode. Potential common failures include wear and tear on high-pressure Common-Rail pumps due to contamination, piston ring wear and sump contamination during continuous low-load operation, turbocharger fouling leading to performance loss, and wear and tear on the urea dosing system and SCR (Selective Catalytic Reduction) catalyst within the NOx reduction system.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
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