i have posted about 3 threads already just to try to fix my problem but still i am having the same issue. today im mowing and its about 92 degrees and the grass im cutting is particularly high however i am cutting it in 2 passes so it shouldn't be a problem with bogging down the motor. after i started it up i worked for about 15 minutes before the engine suddenly lost power and shut down. than i would start it right back up and it would take about 2 passes and cut out. i also noticed that with the blades off when i wasnt driving around my rpms fluctuated rapidly upppppppp and downnnnnnnnnnnn and so on.