OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Trimmers and Brushcutters Two Stroke Trimmers & Brushcutters Mcculloch trim mac 240

Have not had time to check the piston or cylinder wall.can anyone tell me does the carb work by vaccume if so how is it created is it through the diaphragm only trying to figure out how it works and how the petrol gets from the petrol bottle up to the carb.thanks