I’ve worked on hundreds of carbs on anything from bikes,boats,garden gear etc and out of all those times probably came across a carby that was gummed up twice.I know for a fact some of them hadn’t run for a decade or more with petrol that was that old in them and ran just by draining bowl and fresh fuel and some new dry rotted fuel lines replaced.
I can tell you know that those guys that tell you if you leave fuel in a carby for a month,2 months,3 months…the fuel will evaporate and the carby will gum up are full of it.I’ve had fuel in my boats carb for probably a year or more now (I got lazy and didn’t fire it up every month or so) and I just stripped the carb and it was spotless, yes Spotless!!
The fuel was old that’s it.
Believe it or not it’s up to you.
Never run any carb dry on anything and if you don’t use it for a period of time fire it up periodically to get things circulating and preferably either A put stabiliser in(Apparently) it helps keep fuel fresh for a year or dump it out every few months into garden gear,etc and renew.