I have a 2006 997 with 2100hrs. Its been hot and humid here lately and I've been having some issues with my mower shutting off around the 1-1.5hr mark of operation. When it shuts off the second light from the front of the machine (there are 4 lights in a row) comes on and the machine beeps. If I leave it sit for about a minute it will restart. The grass has been hatefully tall and the machine is definitely working, I'm just surprised its shutting off on me like this. I checked the radiator and there was some grass built up behind the oil cooler, nothing excessive in my opinion.
Any suggestions on what to look for or where to start?