I have never had one single carb on any of my equipment or my mower get gummed up and not start. Trimmers, edgers, chainsaw, blowers, pressure washer, mowers, everything. I have never had to rip one carb apart for cleaning. I run 87 octane with 10% ethanol and redmax synthetic blend in all my 2 strokes, i add an ounce of SEAFOAM to each gallon. I have never replaced my fuel lines or anything and never had one problem. Am i just lucky or is the seafoam just the ticket?