Hi, I have a 9.50 hp evenrude outboard model #9022a which i'm told is a 1970 model. i'm thinking of buying another one i've seen advertised for parts.It's advertised as a 1970 model as well but the model # is 10422r & is 9.50 hp as well.My questions are is this 10422r a 1970 year model & will the parts be compatible with mine. Thanking you...Warren...