Hey guys. I've noticed on more than one occasion, that when a bed-edger was used to edge mulch beds on a lawn this time of year (or later into the Summer), a strip of burnt grass appears right between where the wheels of the bed-edger rolled. This burnt strip always follows the exact contour of the bed and usually is about a foot away from the edge of the bed. Obviously, whatever the problem is with the grass that I've been seeing, the bed-edger is causing it. After a careful examination of my friend's bed-edger, I noticed that the exhaust on those machines points down at the grass. Am I correct in thinking that it's the heat from that exhaust blowing down onto the grass as the machine slowly rolls by, that cooks the grass (leaving what looks like a burnt strip of grass)? The friend who owns the edger I looked at told me today that he's noticed that his edger leaves that same, burnt strip whenever he edges beds with it. Until I mentioned my exhaust theory, he thought his edger had a fuel leak, or something. After I showed him how the exhaust on machines like his pointed down at the turf, he agreed that I might be onto something with my theory. What do you guys think? I can't be the only one who's noticed this phenomenon.