This is the TOOL for adjusting fuel and air mixture and does a fabulous job making your machine run perfectly. Echo and the EPA stupidly makes it seem like we cannot adjust our machines for the shit ass fuel with ethanol, and the climate or environment we work in ourselves and two places I went to wanted to immediately replace the carburetor….. all BULLSHIT!!! Buy this tool and save yourself a bunch of money and watch YouTube for tutorials to tune your machine yourself!! Best tool ever!!
