John Deere Z 520a Zero Turn Lawn Mower With 25 HP Motor, 832 Hours, 60" 7 Iron Deck. Owner Stated, "PTO Will Only Engage At Idle Due To An Over Voltage Issue- Code 1 And 3 Flashes. Once Deck Engages It Will Keep It Engaged At High Speed. Electrical Issue With Charging/Ignition." Motor Seems Weak But Owner Stated, "Compression Is Good, May Be Due To Electrical Issues." Owner Stated, "All Safety Functions And Electric Deck Lift Work As It Should. Fresh Engine Oil And Hydraulic Fluid Change." Runs And Drives.