... test equipment 4)Low operation cost specification of natural gas generator: Gas Generator - 50 HZ AT 1500/1000 RPMENGINE Alternator ... box with Auto controller,ECU and spark system, Gas and Air Mixer,Radiator Fan,Fire protection system,Air filter, oil filter, Muffler, ... Voltmeter,Ammeter,Frequency list,Water thermometer,Oil pressure gauge,Hour meter.2. Control partsStart/stop key switch, start button, ...