FWIW the 291 is a lot of saw for occasional work. Mind you, not a 361 or something but a 25 series would probably be more suitable.

Anyway, I have never heard of having to leave any of my Stihl saws for hours upon flooding. Have I flooded them, certainly. Guess I am old school, flood any carb'd engine and you just hold the throttle wide open while turning it over. If I waited for a flooded saw to clear itself the pipes in my house would have frozen years ago.