The Smarter Tools 2000IQ doesn't have a vent or a cap vent at all. The way I "unflooded" my unit was to:
1) Let it sit for a few hours (if you aren't in a hurry to use it)
or
2) Turn the fuel source to "off" , also set the generator to "off" (as in on/off) and just pull the string about 10 times. then, wait a minute or two, turn the fuel switch to on and then turn the generator to "on" and pull the choke out about 1/2 way and give it a big, honking pull. Also, make sure you have the "eco" mode turned off when you're trying to start it. After you get it started and warmed up a little, then put it into eco mode.
If you want a great gas can that will stop automatically when your tank is full, try this! It's the greatest thing since sliced bread: There should be a video on the page that demonstrates how easy it is to simply, tip and let 'er rip and it will turn itself off!
Hope this helps,
WoodGlue