I have my fathers very old Champion outboard motor. I don't know the year, but it is single cylinder with the visible flywheel on top... doubles as the rope starter. The decal with oiling, starting and running instructions on the side of the gas tank is mostly rubbed off and gone. Can anyone help with information about this engine (oil/gas ration, start/run instructions, and what the large lever with the button on it that goes underneath the flywheel is)? I can get the serial number off the motor later if that is needed to figure the year out. I have had no luck finding service information for this engine online besides the Old Outboard Book and an old engine forum that isn't free. Any information to help get me started would be appreciated!