I have a 445 that the engine stalls on. It has just short of 1000 Hrs on it. When I mow after an hour or so it starts to stall every once in a while. Then as you continue mowing it gets worse. Sometimes if I shut off the engine and let the key run the fuel pump a couple of times I can then start it back up and mow for a longer period of time before it acts up again. After a while that doesn't work either. This spring I replaced the fuel filter as regular maintenance. I have removed the fuel pump and checked the suction screen and replaced the short pickup fuel hose on the pump. The old hose looked good though. Some things I have noticed. I don't get any codes, the pto never shuts off, the dash never flickers or quits working. The lights keep working. The red and green LED lights stay lit also. At one time I could get it to act up without the mower engaged so I removed the air filter to try and see if I am loosing fuel. I could see a small amount on top of the throttle plate until it died and then it didn't have any. When it died I could hear the electric pump running until it developed enough pressure to shut off. I removed the return fuel hose and on the plastic "T" and when it was running there was some fuel sputtering out of it. Not much but some. After it died then no fuel came out of it. What I don't know is if the electronics are shutting off the injector or if I am not getting fuel to the injector. When it starts back up and runs I have plenty of power until it acts up again. For the first hour or so I have plenty of power also. Any ideas? Thanks.