I have a John Deere 345 that we bought new in 1998. It's at about 950 hours right now, and is 70000+ serial number.
The water pump failed, and that required pulling the engine, so I took it to the dealer for the repair. (Not too bad at $700+), I thought. When it was retruned, the first time it was used to mow, the thing ran fine for about 45 minutes, then just quit, as if you turned off the key. It restarted after about 5 minutes, and then died after about 5 minutes of running again.
Called the dealer and they picked it up to check it out, and said a "7-pin connector was not fully seated", and it was corrected. Ran it today for about 20 minutes, and it shut down, again. When I tried to re-start, nothing. I left the key in the on position, and in about 10 seconds, the idiot lights came on (as they normally do when you turn on the key), so I cranked it and it re-started. It ran for 10 seconds or so, then quit. Same symptoms/routine, and after about 5 re-starts I limped it back to the barn and the dealer will come and pick it up tomorrow.
Further, when I picked it up, they went to get it from the holding area, and couldn't get it started (that's when the water pump repair was completed on the FIRST repair trip). They had pressure washed the thing, and the water got in the TDM (timing delay module, a common wet-induced problem on these). He also told me they had pressure washed it when it first came in, pressure washed it after engine removal, and pressure washed it after re-installation was complete, before I picked it up.
Bottom line is that I feel that because it runs for awhile before it quits, and then a complete electrical shutdown occurs, there must be some temperature-sensor-related feature, OR, possibly the printed circuit board fails when it heats up under the hood.
ANYONE here had similar symptoms and resolution?