RedactedNarrative: On August 29th, 2015, at approximately 22:30, operator2 was involved in a property damage only boating accident on Tellico Lake within the harbor limits of Tellico Marina.  Two vessels were involved with no injuries occurring.  Vessel 1 (V1) was a 2007 21''9” Tracker Pontoon with TN Registration TN 5391 DZ and a HINBUJO361H607, that was parked in slip inside Tellico Marina with no one aboard at the time of the accident.  V1 also had its outboard motor lifted out of the water with the prop and lower unit exposed.  
  
  Vessel 2 (V2) was a 1998 22'' Fourwinns 220 Horizon with TN Registration TN 9396 CF with a HIN FWNCF133L798 operated by owner.  V2 had six (6) passengers aboard the vessel at the time of the accident.  V2 arrived at the marina to eat at the restaurant at approximately 20:00.  Upon arriving, V2 docked on the east side of the restaurant with the bow pointing toward the bank.  
  
  V2 undocked at approximately 22:30 and proceeded to make an immediate sharp right turn to exit the marina.  Operator2 stated he had problems with the shifter and throttle mechanism all day that day.  Stating when he put the vessel in gear it would “rev up” but not move until suddenly the throttle would catch and slam into gear.  The area in which incident occurred is a close quarters vessel operation situation. Compounding this issue with a mechanical problem and the size of V2, it made the sharp turn almost impossible to maneuver without taking a secondary corrective action.  All of these issues combined were the contributing factors for the incident.  Operator2 thought he would clear any obstacles/obstructions, but V2 struck V1 in the engine/lower unit area.  The throttle/shifter mechanism not functioning properly and not keeping a proper lookout were the main factors contributing to the accident.