I just got the kit to convert my generator to tri-fuel (gasoline, propane, or natural gas). My kit came from Generatorsales.com. I had to send my carburetor to them for conversion (drilling a port in the side). The carb came back with a regulator, hoses, clamps, bolts & instructions for $180. I had to supply the hose & fittings from the natural gas line over to the regulator (quick disconnect hose kit from Home Depot). I fabricated a bracket to mount the regulator out of the way and hooked it up. My next step is to follow the instructions on starting and setting the fuel flow. Be aware that natural gas and propane have less energy content than gasoline, so your generator output will be 65% (nat gas) or 80% (propane) of the rated output using gasoline. For a small generator, the expense of the conversion may be half the cost of the generator. The payback may be in engine longevity and not fighting a gummed up carb in the middle of a storm. David from Alabama