Breathe easier with this genuine OEM air filter, part number 791-181757, built for select Refrigerator, String Trimmer, or Leaf Blower models from U-Line, Husqvarna, Bolens, Craftsman, MTD, Troy-Bilt, Yard Machines, Yard-Man, Murray, Cub Cadet, or Ryobi.
If the string trimmer engine runs poorly the air filter might be clogged. Remove the air filter and inspect. If restricted replace with the correct filter.