The kit I used you can run gasoline, propane, or natural gas. I have the kit all installed on the generator. I have stuff ready to run a natural gas line to where I use the generator, but one thing or another has kept me from getting the line run. Due to the fact that the block wall was partly filled with concrete there, it took longer to punch a hole through the foundation, delaying the project.
I was already to go, when I had problems with my shower. I hope to finish that up today having gotter the parts yesterday.
You may need a bigger kit. Mine is only 10 HP.