RedactedNarrative: The operator was slowing the boat from an on plane speed (approximately 30 mph/tiller motor) but the motor intermittently picked up speed. The operator was thrown from the watercraft. He was not wearing a life jacket and the lanyard was not being worn. The boat began to run in the circle of death motion with the throttle engaged. Witnesses observed this from another boat and responded to the whereabouts. Ultimately, the boat was running out of control and the operator was run over by the motor from the watercraft. His right forearm was cut by the propeller. Witnesses pulled the operator from the frigid water, treated him and were able to shut down the motor. The victim and his dog were brought back to the landing where law enforcement and EMS were summoned. The operator was transported by ambulance to the hospital. The motor on the boat was new to the operator.