I've had my Lesco Z Spray for about a month now. It's an 07-08 model with 60 hours on it. I was in the middle of spraying on my last lawn scheduled for the day and it just stopped spraying. The outflow volume didn't go from normal and then begin to slowly "dribble" out of the nozzels and then quit. It just simply quit. I couldn't get ANY output from the boom spray tips. I did seem to get a little bit out of the wand though. The pump still runs, but it seems like it isn't sucking mixture from the tank. I checked the inline strainer and dumped a small amount of junk from it, but not enough that would keep it from operating right. The operators manual said to look for a gate valve, but I have no idea what it is or where it's located. Nevertheless, I tried to feel for some kind of suction on both ends of the line and I felt no suction. BTW, I have a 4.9 GPM Projet 4100-143 pump. Thanks for the help.