I just got a Johnson 25hp mdel RD17S Serial#1286660 and I was wondering what the "S" means. I thought maybe it meant short shaft but it has a long shaft. I bought this motor cheap just for the contols and steering. The boat is in real bad shape.<br />Is this a good model for restoration? It looks like it might run but as they say in Maine"Hard Tellin Not Knowin'"<br />Also is there a way to test a power pack on an Evinrude 7.5 hp 1982? or 84?