For all you guys running a snapper hi-vac the one i have has the feature where you can release the handle and the motor will stay running while you empty the bag. The only problem is most of the time when i try to do this the engine will die, the other half the time when i try to kill the engine by releaseing the handle it keeps running? If tried letting the handle go fast, releaseing it slow,etc. But it only works for me half of the time anyone have any experince with this or suggestions. I dont us the 21 much but when i do its handy not to have to kill the mower when i dump the bag or to move a rock,waterhose,paper,toys,etc.