Ok in the pic which is the air and wich is the fuel, Hi or low, and not sure how to adjust. All i know it is messed up and when i give it throttle it bogs down then gets back up and keeps repeating itself even though i'm not touching the throttle it does it. . Does it need more fuel or more air. Now that the screws are all messed up i need to start over. Any easy basic way to adjust would be greatly appreciated.