I have a 52'' mini z and the pto fails to work after ive been mowing for a while. Im not sure if it is the switch or the clutch. I have to keep engageing it until it starts back up. The clutch seems to be working fine when its on. I also have a problem with gas seeping out the top of the caps. I thought it was just when the tanks were full but it happens no matter how full the are. Any suggestions on whats going on with my z.