Abstract: An automatic pinsetter of the type having entirely mechanical logic control is retrofitted with an electrical control system that replaces mechanical start-stop mechanism used to stop and start a clutch which engages a motor driving the sub-systems of the pinsetter. The system includes an electrical control module having a solenoid that operates the clutch, so as to engage or disengage the motor, depending on the current operating state of the pinsetter. A series of switches replace various mechanical linkages to sense pinsetter conditions, and deliver signals to the control module. An out-of-range pin condition can be sensed and automatically cleared by the control system.