About a month ago I fired up the leaf vac to chip some crap. I run it dry for storage. It's hard to start so I filled the tank, put the fuel can away and sprayed a shot of carb cleaner in the intake and rolled it over. It fired allright, and backfired about a cup of fuel out of the intake. I believe the carb float stuck open and flooded the intake manifold with fresh fuel. I hauled butt and grabbed the red bottle and knocked it out with a one second burst. Freaking scared the crap out of me because it was parked under the deck. A new air filter and she purrs like a kitten again.