Onan gas generator want start

After you've held in the stop button a couple of times till the light goes out, try draining the fuel bowl on the carburetor to see if it's full meaning the generator is getting gas. If it's not buy enough gas line to go from the fuel pump inlet to a gas can and see if you can get some gas into the fuel bowl. If you've got spark, fuel and compression it should start.

Oil level. They shut off if it gets too low.