Main Engine 4-Stroke · Main Engines (4-Stroke)
Maintaining consistent engine performance is crucial for maritime operations, especially when dealing with medium-speed trunk piston engines like the Wärtsilä 6LW26. Operators must be vigilant about common failures such as piston ring wear and peeling under continuous low-load operation, which can lead to significant issues if not addressed promptly. Regular visual inspections of piston crowns and rings by borescope through the indicator cock are essential, along with monitoring the residual Base Number (BN) in cylinder oil—specifically ensuring it remains above BN10 for fuels with sulfur content between 0.1% and 0.5%. Additionally, maintaining proper cylinder oil selection is critical to mitigate cold corrosion during low-load operation, as engine temperatures can fall below the dew point of combustion gases, leading to acidic condensation.
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