I am at a loss and ready to reach out to the experts!
My 2305 with about 600 hours on it has been acting up for about 2 months. The first instance was about 45 minutes into mowing and the machine shutdown like I turned off the ignition. It would not restart. It did not seem to even try to fire. I presumed it was an issue with the fuel cut-off circuit. I tore into it assuming I had another electrical issue (I replaced the diode a couple years ago). By the time I figured out it was not the diode, the machine also suddenly started. I put it away and when I had time to mow again, I proceeded to completely mow the lawn without issue (about an hour). I then proceeded to do some maintenance (including replacing the fuel filter). When I went to mow again, about 10 minutes into the process, it shuts down again. This time I presume it is an issue with the fuel cut-off solenoid. I removed it to see if it was pulling in, and not only was the solenoid working fine, but the machine would not start with it removed.
I reinstalled the solenoid, walked away for a few minutes, and when I returned it started again. Each time this thing has died, I have jumped off the machine and verified that the fuel filter bowl was still full.
Now today, I went out there and it started without issue. I started mowing and a few minutes in it craps out again. Again, just to be sure, I removed the fuel solenoid and tried to start again. Still no luck. I am now confident that the fuel cut-off circuit (both electrical and mechanical) is not causing this shut-down. So now what? I disconnected the fuel line running from the fuel injection pump back up to the fuel tank. When cranking, there is definitely fuel flowing back to the tank. Yet, the machine was not starting. I am at a loss. It was firing, but never enough to continue to run. Fast forward about 2 hours and I managed to get it to run, after stumbling a bit, it smoothed out and ran long enough to put it in the garage.
Needless to say, I have no confidence in this machine. My yard is hilly enough that I almost had to leave the tractor out in the yard because my golf car didn't have enough traction to pull it up to the driveway. I am not sure what to do next. I need to clean-up leaves and need to be able to trust this thing for snow clean-up this year. I hate intermittent issues. What about a mechanical fuel system could be so intermittent? I considered the possibility of debris in the tank, but in each case, the bowl was full. I turned out the fuel shut-off once just to see if maybe there was a flow issue through the petcock. One of the times when it started but was running rough, I was able to watch it pull down the fuel level in that bowl. It happens (and the refilled) slowly enough that I am fairly confident I would be able to see if that was the reason for the shutdown. I really don't know what to check next.
Thanks for reading this ramble.