WITNESSES STATED THAT V1 WAS SPUTTERING AT HIGH RATES OF SPEED.  V1 OPERATOR REMOVED THE SEAT IN ORDER TO ADJUST THE MOTOR.  WHILE OPERATING AT A HIGH RATE OF SPEED AND WORKING ON THE MOTOR, V1 OPERATOR WAS NOT PAYING ATTENTION TO WHERE HE WAS HEADED.  V1 OPERATOR STATED , "THE ONLY THING I REMEMBER WAS LOOKING UP AND SEEING THE DOCK BEFORE I HIT IT".  V1 OPERATOR LEFT THE PWC SEAT ON THE BEACH BEHIND THE APARTMENTS WHERE HE RESIDES. V1 OPERATOR WAS TREATED ON SCENE BY CASSELBERRY FIRE RESCUE AND WAS AIRLIFTED TO ORLANDO REGIONAL MEDICAL CENTER BY FIRESTAR.
CASSELBERRY                   