There are extra steps to prevent the fuel that is trapped in the bowl from gunking up.
1). Drain the sediment cup at the fuel shut off valve (don’t forget to turn the fuel to the off position first).
2). Remember to hold a container under the valve to catch the fuel that will be in there.
3). Remove the needle valve from the bottom of the carburetor float bowl.
4). This is not a valve which you adjust to speed up or slow down the idle. It simply is removed then later reinstalled until snug. Do not over tighten. Notice the valve now removed sitting on the black frame piece beside the bar code on the can. It does have an O-ring on it and is small and easily lost so be careful. You can’t run your generator without it.