RedactedNarrative: V1 was traveling Northbound from Steamboat Slough to the Mississippi River Channel, river marker 506.  While entering the navigation channel, the vessel collided with a fixed wooden object (stump) tearing off the outdrive at the gimbal ring. The vessel began taking on water.  The southbound current pushed V1 onto an island near Princeton Wildlife Area. Individual was not wearing a life jacket & waited for rescue personnel to arrive & tow the boat to shore.