I was covered up and could not get to it for 4-5 days so my next door neighbor let a 'friend' troubleshoot her mower, a craftsman 42", 1999 model. It would also run 15 min or so and quit. He kept it a week, brought it back, said it as fixed and charged her $22 for a new fuel pump. Are you kidding me? I did not tell her but these mowers do not have a fuel pump. I took off the gas cap and there was the fix.... a 1/16 new vent hole had been drilled into it........ and I also agree with the other post of it possibly overheating......