I have a LX279 John Deere mower. The fuel pump started leaking out of a vent hole. It was running good except for the leak which was dripping on the muffler cover. I replaced the fuel pump with a new pump and It started right up ran for about 30 seconds and acted like it ran out of gas but the tank was full. I don't have a Tech Manual to referance so I need some advice from some of you with more experiance. Can you give me some ideas to check or point me to some information on the net or anywhere so I can get this mower running again. My grass is getting high. Thanks