RedactedNarrative: A 28' motorboat carrying two occupants onboard was returning to a marina in Clinton when the engine started making a grinding noise creating vibration. The operator stopped the engine and saw water coming in through the stern drive of the vessel. Water starting coming into the vessel and they removed it manually. They called 911. They waved down a small boat and one occupant went onto the small boat before the Madison Fire Department arrived. The Operator boarded the Fire Department Boat and  US Boat towed Vessel #1 to the marina in Clinton. No injuries. PDF's were used.