RedactedNarrative: V1 was attempting to tie up to a dock when it went into forward gear striking V2 in the stern. 
  
  Operator1 stated that he was attempting to tie up his vessel (V1), to the dock when he put the vessel in forward gear and it launched forward striking a vessel (V2),  already secured to the dock in its stern (see attached photos). Operator1 claimed he had recently installed a new part to his vessel that allegedly caused the throttle control to stick as it moved forward.  As a result he was required to use extra force, and when the throttle broke free the throttle was pushed forward more then intended.