I just bought my first mowers today. One was a 48" eXmark WB (the one with the 3 white stripes on the deck) and it ran great for me all day. I mowed a yard with it and it was pleased. I got it one, got it off the trailer, and it fired right up. I drove it around the yard making sharp turns, just to get the hang of them (I wasn't expecting to mow on my way home from buying them). It ran great for about a minute and then it just shut off. It didn't stutter or anything, just up and died. From that point I have not gotten it started. About 10' before it came to it's resting place, I had just clipped the corner of what used to be a flower bed and is now just a lump of dirt in my yard. I hit a few little rocks or stones but nothing major. I run over that hump every time I mow with my father's homeowner Cub Cadet. I also did it with his 20 year old Cub Cadet for years before. So, the mower is dead and sitting there. I took apart the fuel line and checked to make sure it was clean, and it was. I put new, fresh gas in it. I must have pulled the cord over 100 times and nothing. It finally then through a spark out the exhaust and then I stopped trying for the night. When I checked the oil it was brand new but it was also low. Prior to this it was started over 5 times and started good. Needed a shot of start fluid this morning but it started fine 3 more times throughout the day. Keep in mind, this is my first mower so it could even be something really ******** that I just don't know about. I wasn't given a lesson, or a book, or anything. Just a mower.