I recently acquired a firestone 3.6 hp motor. I was told all it needed was to clean and reset the points and lower unit grease. so far i have removed the fuel tank lower shroud. I have removed the nut and washer from the top of the housing for the points but the bell housing that goes on top of the points wont seem to come off. there is maybe an 1/8" of slide and then nothing. Am i missing something?? I tried uploading a picture but can seem to get it to load. Any help is greatly appreciated.