I have a John Deer L111 automatic Lawn Tractor. I started having issues after cutting grass for an hour The mower would start dying. It was due it's annual tune up. I replaced air filter, fuel filter, spark plug ( set the gap at 0.76 ), Changed the oil & oil filter, and the deck belt. I then cranked it up and tried it out. The mower felt like it had more power, so I proceeded cutting grass after an hour of mowing it started to die again. Keep in mind this is not due to thick grass. even with the blade off it still dies. It only runs with the choke all the way up and sometimes it won't stay cranked. I thought I had fixed the issue but apparently not. Has anyone had this same issue? If so, I really could use some guidance on where to look now. Please advise? Your help regarding this matter will be greatly appreciated. Thanks in advance!!