Well, let's tslk about draining carbs, shall we? The message is drain those carbs, it gets ALL the fuel out.
I had the worlds heaviest 10 horse Honda outboard. To drain the carb, one had to remove the lifting straps. remove the hood, loosen a screw, wait till the gas drained out, tighten the screw, etc, etc. So I neglected to do that. My reward was, whilst on a trip, it refused to start. Turns out the starting tube? was clogged with a white residue. Removed that and it now started. Well, of course, I now drain the kicker after every trip. And with the Tohatsu (the worlds lightest 10 horse) which replaced the Honda.
I also have a Honda 1000i, which gave me carb problems after a couple of years. It has a shut off valve, combined with an ignition switch, so you can't run it dry. I got a new carb, and those aren't free. Discovered that there was, as Pat mentioned, a drain screw. That drain screw totally drained the carb's float bowl, no gas remaining. So now I have to take both the small outboard and the generator apart and drain the carbs. A pain in the rear, but they both start easily now.
The top of the Honda generator carb has a servo mechanism, which gives the "i" in the name. After several years of service, these become stickey, so that the no-load speed will vary. Just shoot a little silicone spray in there and all will be well. That generator has lasted for 18 years and is still going strong.
Boris