... Origin:China 1)Engine: Cummins made in china .freshsea water cooling system; heat exchange; Fresh, sea water pump; expansion tank.2 ... ,Brushless ,Single bearing,Anti-condensation heater.3)Engine protecting system: High speed, High water temperature, Low oil Pressure.4 ... structural base frame. With isolators installed.5)24V DC electric system with battery6)control panel with voltage, ampere, frequency, ...