I cleaned my carbs and now I have gas going into my air cleaner box. The only time it starts is when I spray carb cleaner into the air filter. I wonder if this could be the air/fuel mixture screw setting. My Clymer manual says that my carb model has a pre set air/fuel mixture screw setting (where other models say 1 1/2 turns out). I took this to mean screw them all the way in. Is this wrong?