Check all hardware at regular intervals, especially trimmer head attachment bolts. Keep all hardware properly tightened. Before tipping unit, remove fuel. DO NOT tip the trimmer up or over unless specifically instructed to do so. Ensure all wheel blocks, jack stands and tie downs will support unit during maintenance. Replace worn-out mufflers immediately. Continued use could result in fire or explosion. Sharp edges can cut or amputate fingers or a hand. Wrap blade or wear sturdy gloves to servic