I know there have been many questions in regards to year of motors and I read most of them, but I used the 4 web sites to look up my year and am kind of confused. I have a 75 hp Mariner and the serial number is A117373. I, think it is a 85 model, but I'am not sure. Can someone help? Also, one of the housing latches broke and I want to find the part but I don't have a proper name or part number. Thanks in advance!