Hello....new to forum...new to owning a John Deere xuv590i s4 gator. Just purchased a 2016 590i s4 from a guy and was of course told by him that he experienced no problems with the unit...just selling it because he wants to get a Jeep instead...this was his second Gator and he had nothing but praise for both of them. (Then again, he was the one selling and I was the one buying!) Anyway, the gator runs great...until it gets warmed up and after about 15 -20 minutes of cruising around at various (all high gear,so far) speeds, the units starts to sputter and lose mph and to get things rolling again, one needs to press the gas peddle. No lights are coming on at all...it just starts running with spits and sputter. Park it and let things cool down, take it for another spin and the same thing happens....any thoughts out there as to what my problem may be? Once again, it runs real nice...until its been running for a while.