Today my neighbor, who just lost her husband, asked me if I would cut her grass for her. I went over and got her lawn mower out of the garage. I've never seen this type of engine before. It is a Poulan Pro 22". On the engine shroud it says "Intek Premium Plus" at 7 HP. I had a heck of a time getting it started. On the side there is a red slide lever connected to the carb as best as I could see without taking the top off. Then on the top just above that is a little dial but I don't know what it does or where to set it as there are no markings on it. Does this sound familiar to anyone? I've looked for a users manual using the model number 961140016 00 but to no avail. I looked for some numbers in the engine shroud but they are rusted and can't make them out I did figure out after finally getting it started that the red lever on the side controls the speed. Does that lever also set the choke? Does the little dial above the lever on the shroud set the choke? Does it even need to be choked or have a choke? My thanks in advance for any help.