7L21/31-GS-60Hz

This marine diesel engine operates on a four-stroke principle with a long stroke design, featuring a bore of 210 mm and a stroke of 310 mm, which contributes to its efficient combustion process and power output. The MAN Energy Solutions 7L21/31-GS-60Hz is a robust marine engine capable of generating 1400 kW of power at 900 rpm. It runs on Heavy Fuel Oil (HFO), Marine Diesel Oil (MDO), or Marine Gas Oil (MGO) and is designed to meet IMO Tier II and Tier III emission standards with the use of MAN Selective Catalytic Reduction (SCR) technology. The engine incorporates a MAN TCR constant pressure turbocharging system with Jet Assist and intercooling, enhancing its performance and reliability. The engine also includes features such as piston ring designs that prevent carbon buildup and residue formation, which can lead to ring seizure and liner damage. Additionally, it features a system to prevent cylinder liner scuffing and wear, ensuring adequate lubrication between the piston rings and liner. Exhaust valve deposits and carbon buildup are managed with valve rotators to ensure even temperature distribution, while the risk of water contamination in the fuel system is minimized through robust filtration. Regular inspection of the turbocharger is necessary to prevent fouling and excessive bearing play, which are common issues in four-stroke engines.