RedactedNarrative: Operator was cruising when heard a boom and then a popping sound.  The vessel stopped moving.  He looked over the transom and could see that the ALPHA 1 out drive that had been attached to his boom and popping sound he saw a large submerged log floating by and realized that was the object he collided with.  He decided to anchor the vessel and wait until morning to call for assistance as it was getting dark and he was getting tired from all the day's activities.  He admitted to drinking beer.  A passenger attempted to go forward on the vessel but sustained an injury when just forward of the windshield. His friend was taken off the boat and taken for treatment.  Another vessel arrived and took him in tow.  He was given field sobriety tests and a breath alcohol test about 2 hours after the accident occurred which he blow over the state limit of .08.  He was arrested for boating under the influence and unsafe operation.