going across the lake today and could hear a light ticking noise. sounded like motor knocking. killed it on the spot and checked all i know to check. cranked it back up and no noise.put it back in gear and headed back to ramp and it started getting louder. got almost back and someting gave then it wouldnt go. sounded real bad then. pulled oil plug out and oil had no water in it but smells burnt up and was black. chunks of metal on the mag also. can you fix this type of thing or just have to buy the whole lower unit.