S - I'd say it depends. If you don't run your motor very often (say one every three months or so), then you probably want to run the gas out of the carbs to prevent gumming, etc. You may also want to run the gas out for long storage periods for the same reason. If, however, you are running through a tankful of gas every month or so, it would seem there should be no problem as the gas won't break down that fast. Frankly, if you're really worried, you can always add stabil or some other fuel stabilizer and never worry about the carbs! As a matter of regular course, however, seems that you shouldn't worry about emptying the carbs if you're running the motor pretty regularly.