RedactedNarrative: Owner of V2 advised that while V2 was tied to the dock, V1 struck V2 causing a dent on the port pontoon at the bow.  Operator of V1 stated when he attempted to pull out of the marina, he pulled the lever to put it in reverse but it didn't work and he accelerated V1 going forward and hitting V2.  
  
  No mechanical deficiencies were found on V1.