[Charlie-141 FE]

So i mowed again today after charging the battery and the pto quit again right away. I check voltage at high RPM and am getting about 13.5 volts. I then bypassed the seat switch and still no luck, pto would not engage. I then checked continuity on the jumper the PO installed to bypass the reverse switch and that checked good. I then ran a wire directly from the battery to the pto connector and it works perfectly with out ever stopping so i got the lawn finished. That said I'm thinking it is in the pto switch, unless there is some other component i have over looked. i tried to check the pto switch for continuity but not sure what terminal does what, anyone know or have you ever disassembled the pto switch to repair? I really don't want to spend 50 bucks on a new switch if I don't have to. Thanks