... overhaul time of 30000hours 3. Low operation cost: natural gas has a rich reserve with low cost and a high rate of return4 ... controller,ECU and spark system, Gas and Air Mixer,Radiator Fan,Fire protection system,Air filter, oil filter, Muffler, MCCB, Manual ... Voltmeter,Ammeter,Frequency list,Water thermometer,Oil pressure gauge,Hour meter.2. Control partsStart/stop key switch, start button, emergency ...