My father-in-law gave me his 325 lawn tractor cause he couldn't get it to start. Well I was able to get the mower to start by jumping the fuel shut off directly to the battery, just to see if it would run. I checked for voltage on wire that connects to the fuel shut off while key is on and it has no voltage. Also while I had mower running for a min, the PTO clutch would not engage either. To turn the mower off, I had to disconnect the 12 volt lead I used to bypass the electrical system on the fuel shut off. Any ideas on the issue that's causing the no voltage to the fuel shut off?