RedactedNarrative: On may 13 2015 at approximately 1642 hours, the operator of vessel 1 untied the vessel from slip at the cape coral yacht club started the engine while the throttle was in the neutral position. Upon ignition the vessel jerked backwards striking the sea wall causing damage to the cowling and damaging the prop. No injuries reported and no damage to the sea wall at this time. Fwc offense number fwsw15off06128. I and my supervisor, personally observed the throttle and it was clearly in neutral but once started the motor cranked in reverse on the vessel. The vessel would not start in forward or reverse position, only in neutral, but the vessel would move in reverse.