I have a Scag Turf Runner w/high mounted grass catcher. I "rescued" it from the weeds, and it now runs GREAT. Only thing is, how are you supposed to know when the hopper is full of clippings? I'm assuming it's supposed to shut off the deck, or warn the operator somehow before the vacuum tube is totally packed tight. I noticed there is a switch under the hopper that turns off the deck when it's lifted and wondered if that was supposed to turn it off when full somehow. It's a great little mower if I didn't have to crawl under the deck to unclog it every other time I dump it. Can some of you guys with more experience with the scag tell me how it's supposed to work? Thanks..