I have an LX280 with a 18HP Kawasaki 585cc engine, this mower has about 500 hours on it, I keep it serviced regularly but started having issues last year. The mower starts fine every time and runs fine but after about 45 minutes into mowing or sooner when it is very hot outside the mower will just shutdown like it is out of gas, I can usually stop the mower and turn off the blades quickly and it will keep running, also when it goes dead I can immediately start it back up without issue. Does anyone have an ideas on what this could be, it seems like a heat issue, because I mowed about three weeks ago and it was cool and had no issues, I mowed yesterday when it was around 70 degrees outside and it did this a couple times. Thanks in advance.