Hey guys, im trying to get my boat back in the water before it gets too late in the season Im fixing my old chrysler sea king 15hp montgomery ward. The model # reads VWB 52119C. Ive looked all over and the best resource Ive found is here. The 1980 has a model # VWB52119 without a "C" and the 1981 and 1982 has a model # with an "R" at the end. Ive googled and seen a lot of people with A,B, and C at the end of the "52119" portion. Whats what here can anyone tell me which year my motor is and what to make of these A's B's and C's?

Thanks!