SoundGuy wrote:
To start - make sure the fuel cap vent is closed, turn on the choke, turn on the ignition switch, and let the generator sit for a couple of minutes - that allows any pressure that has built up in the fuel tank to force gas into the vacuum fuel pump. After a couple of minutes, start the generator, adjust the choke, and don't forget to open the fuel cap vent. Using this procedure mine have started almost every time on the first pull.
Depending how long it has been since you filled the gas tank, a "couple of minutes" of sitting won't really change anything. A dealer told me to rock the generator side to side before attempting to start. The rocking will cause the pressure to build and aid starting as mentioned above. To see how that happens, try rocking a full, sealed gas can and then open the vent.