The Champion Power Equipment 201169 6500-Watt Tri-Fuel Portable Natural Gas Ready Generator with CO Shield® is a reliable source of power with the flexibility you need. When you are not running your generator on natural gas, you also have the option of operating it on gasoline or propane. Electric start, CO Shield® carbon monoxide auto shutoff system, 8.5-gallon fuel tank, up to 12 hours of run time at 50% load. Power Output: 6500 running watts and 8125 starting watts on gasoline; 6000 running watts and 7500 starting watts on propane; 5500 running watts and 6875 starting watts on natural gas.