26Trimming operationAlways wear proper eye protection against thrown objects.Objects can bounce up at you from the ground under the shield,or ricochet off any nearby hard surface.Do not trim at high speed near roadways when there is traffic, orin places where there are pedestrians. If you must trim wherepeople are in the zone of risk use a much lower or reducedspeed, by using a partial trigger setting. Do not use full throttle.Do not push the line into tough weeds, trees, or wire fences.Pushing the line into chicken wire, chain link fencing or thickbrush can result in snapped-off line ends being hurled back at theoperator. The proper way is to cut right up to a barrier, such asany of those mentioned, but never run the line into or through theobstruction. Do not cut closely to obstruction or barrier.Avoid nylon line contact with broken wire fencing. Pieces of wirebroken off by the trimmer can be hurled at high speeds.Basic trimming operation with metal bladeDo not trim near cars or pedestrians.Line pushed into wire fencing will snap off.Avoid wireWARNINGPlease observe the following instructions when trimming. Ensure that the trimmer blade does not come into contact with hard obstructions such as stone, metal, or concrete. If the blade hits an obstruction, turn off the engine immediately and ensure that the blade hasstopped before checking the blade and shield for damage. Never use cracked blades, as they could fly off while you are working. Check to ensure that the trimmer blade has been tightened securely in place. Replace the shield if it is damaged or cracked. Replace the trimmer blade nut when it becomes worn. Failure to do so could lead to an accident or serious injury.