RedactedNarrative: V1 operator was attempting to pull into a boat slip when the throttle control cable disconnected causing V1 to shift into reverse. V1 continued out of control, in reverse, at full throttle until it's starboard side stern struck V2's prop causing a blade to bend. V2 was unoccupied and on a boat lift at the time of the accident.
  
  V1 operator stated V1 had recently been serviced and the mechanic told him he had adjusted the throttle cable.  Upon inspection a cotter pin was missing from the throttle cable.