I have Yard-Man 27.5" cutting deck riding mower, model 247.270190. Won't start. Power is not getting to the starter when key is turned, can hear clicking sound. Connect power to starter directly and it will turn. Suspect part next to battery shown in Operator's manual model 247.270190 page 31 PN 15, but the item is not identified in the table. What is this part? is it solinoid? What could be other problems? Thanks