RedactedNarrative: V1 was leaving docking area behind Marina Cafe.  V2 was docked in corner dock with stern facing the small turning area.  O1 was trying to turn V1 towards the harbor. Occupants aboard V1 warned O1 of close proximity to V2's raised outboard motor.  O1 accelerated quickly while swinging towards V2's stern.  V1's port side pontoon impacted the propeller and skeg on V2 causing the skeg to bend towards the starboard side of V2 and break as well as minor scratches to the propeller.