7General operationDo not run the engine indoors, or where there is poor ventilation.Engine fumes contain deadly poisonous carbon monoxide.Do not operate with a worn or damaged cutting attachment.Do not run engine at full throttle without a load.Do not hit rocks, stones, tree stumps, and other foreign objects with the cutting attachment.If cutting attachment strikes an obstruction, stop engine immediately and inspect cuttingattachment for damage.Start on ground with cutting attachment in the clear.Lay the unit down on a clear area and set the controls for starting.Be sure the cutting attachment cannot contact the ground or any obstruction.Hold the unit firmly down so you will not lose control during starting.Do not start the unit in the air.The unit could swing into your leg or an obstruction if you lose control.Do not raise the cutting attachment above knee height.If raised higher, the cutting attachment will be more directly in line with your face.Thrown objects may hit your face and eyes.Wear the recommended foot, leg, head, eye and hearing protection at all times duringoperation.Also assess the job to be done, and whether other types of protection may be necessary.Never operate the unit without the proper guards and other protective devices.Never operate the unit without good visibility and light.Do not allow anyone to enter the operating danger zone with you.The danger zone is an area of 15 m in radius.Insist that persons in the risk zone beyond the danger zone wear eye protection to protectthem from thrown objects.If the unit must be used where there are unprotected people, operate at a low throttle speedto reduce the risk.Ensure that there are no children, bystanders, and pets in the work area.Keep all children, bystanders and fellow workers outside 15 m radius for grass trimmers.WARNINGEye protection should be considered for everyone in the zone of risk.Risk of eye injury diminishes with distance.