just got a new Toro Zmarter new for a dealer out of state dew to no on had one around here in Arkansas. i got it back here an was mowing with it on dads flat front yard and it died on me when i turned. well i thought it was out of diesel. so i filled it it up and ran fine. but when i start mowing on so hills side it started dieing all the time i would get about 8 to 10' and it would shut the mower down. would restart no problem but when i took off the brake it would die again. i would have to pull it to a flat spot to get it to run again. call dear they said it sound like water in the fuel. change diesel and fuel filter. an after doing that it still die on hill side and going down hills and backing up. some time dies when tying to go up ramp on trail. an i know that is not to steep for it. ( An on have any idea's what it could be?) it only has 27.5 hrs on it..) 23Hp kubota diesel 60 2006 it was still in box when got it. they assembled it the day before.