RedactedNarrative: Unit 1 was tied to dock with both bow/stern lines in front of Unit 2. Operator of Unit 2 was attempting to undock and untied lines. Unit 2 operator had his throttle in forward trying to get off of dock and then stated that it was stuck in forward and would not come out of gear. Unit 2 bow hit and punctured the outboard motor of Unit 1. Outboard motor of unit 1 was punctured through the cowling, through a second plastic cover, and stopped but cracked what may be the computer housing of the motor. 
  
  Still under investigation.