Main Engine 4-Stroke · Main Engines (4-Stroke)
Utilizing a compact and cost-effective design, the 7L H21/32 engine from HiMSEN is part of the H17/28 engine family, featuring a 4-stroke cycle with a bore of 210 mm and a stroke of 320 mm. This engine delivers a maximum continuous rating (MCR) of 2380 kW at 900 rpm, and it is compliant with IMO Tier II emissions standards. It supports fuel types such as Marine Diesel Oil (MDO) and Marine Gas Oil (MGO). The engine's notable features include its in-house production by Hyundai Heavy Industries (HHI) and a growing global market share. The verified specifications highlight a compression ratio of 17:1 and a maximum combustion pressure of 200 bar, contributing to its efficient operation. Common maintenance issues include piston cooling nozzle blockage, crankcase oil mist build-up, exhaust valve seat erosion, and fuel injection nozzle coking, as detailed in HiMSEN’s maintenance guidelines and various industry sources.
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