8LH35/40

This marine diesel engine, part of HiMSEN’s H35/40 family, is designated as the 8LH35/40 and delivers a robust power output of 4200 kW at 720 rpm. The engine features an L configuration with eight cylinders, each having a bore of 350 mm and a stroke of 400 mm. It operates on heavy fuel oil (HFO) or marine diesel oil (MDO), making it versatile for various maritime applications. The 8LH35/40 is designed to meet stringent efficiency standards, with a specific fuel oil consumption (SFOC) of 177 g/kWh at 100% maximum continuous rating (MCR) and 174 g/kWh at 85% MCR. The engine’s advanced design includes an enhanced Miller timing system for compliance with NOx emissions standards, a feature that ensures environmental friendliness. The 8LH35/40 is built to withstand the harsh marine environment, but it does require regular maintenance to prevent common issues such as cylinder cover wear and surface corrosion, which can occur due to marine conditions. Regular reconditioning during overhauls is essential to maintain optimal performance. Additionally, water contamination in the crankcase lubricating oil can lead to acid formation and bearing wear, making dipstick checks, sight glass inspections, and pressure fluctuations critical inspection points. Abrasive particles in the fuel can cause piston ring and bearing wear, with specific wear limits for the cylinder liner and flame ring set at 0.4 mm and 0.2 mm, respectively. The turbocharger's compressor and turbine are also prone to wear, necessitating water washing every 200-500 operating hours. Saline environments can cause corrosion in bearings due to chloride ions, leading to electrochemical reactions when mixed with lubricating oil. Regular maintenance and inspections are crucial to ensure the longevity and reliability of this powerful marine engine.