Main Engine 4-Stroke · Main Engines (4-Stroke)
The Wärtsilä 9LW20 Auxpac is a marine diesel engine designed for auxiliary power applications. Manufactured by Wärtsilä, this model features a bore and stroke of 200 mm × 280 mm, delivering 990 kW at 1200 rpm with a 4-stroke configuration. Capable of running on heavy fuel oil (HFO) or marine diesel oil (MDO), it is known for its robust performance and reliability. Common maintenance concerns include issues such as balancing shaft wear, turbocharger overheating during high-rpm operation, piston ring wear, injector system erosion, and outdated pneumatic exhaust valves. Regular inspections, particularly of the balancing shafts and cylinder liner wear, are advised to prevent costly failures and ensure optimal engine longevity.
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