I have recently acquired an old Evinrude Fleetwin 7.5hp model 7522 which I believe is a 1957. The motor had not been run in several years and had no spark which I was able to correct with a clean of the points. I was able to get the motor running pretty well but don't know the proper setting position for the high and low speed knobs. To get the motor to run I turned each all the way in (to the right) and set back to approximately 1/2 turn. Can anyone telling me the proper way to adjust these? The motor seems to run fine now but I would like to have them set properly.