Murry rider wont start?

I have a millennium edition murry rider that just died . I used it last week went to crank it up yesterday it got to the end of the drive way and I had to lift up the front end and set the mower on its back so I could beat out the deck where I had hit a root the week before. Well then it started right up went 30 feet and slowly died. Now when I try to turn it over with or with out choke it will act like its trying to start but cant. I changed the gas drained the tank and bowl, changed the plug and the oil.