4KH1-TFX20 marine diezel engine is a marine high-speed diezel engine,  which is redesigned and developed by Isuzu Engine on the basis of the 4KH1 power platform. The factory has obtained the quality management system certificate of CCS，The products have obtained the type approval certificate of CCS, emission approval certificate of CCS and marine product certificate of CCS.

The engine adopts inline 4-cylinder 8-valve, with a displacement of 3.0 litres, compact design, small size, low noise, strong power and a maximum speed of 3500 rpm, is one of the rare high speed marine diezel engines in China,the engine adopts EFI intelligent control technology to precisely adjust the fuel injection time and fuel injection volume, and adopts turbocharger and air intake cooling to make the fuel burn more fully,which is very fuel efficient and environmental friendly. It also adopts high pressure common rail technology, the engine runs more smoothly and with less vibration.The oil is cooled twice, so the oil temperature is very stable even when used for a long time under high load conditions.It can be matched with gearbox, sterndrive and water jet as the marine propulsion main engine, and also can be used as marine auxiliary engine.