6EQUIPMENTWARNING DANGERUse only ECHO approved attachments. Serious injury may result from the use of a non-approved attachmentcombination. ECHO, INC. will not be responsible for the failure of cutting devices, attachments or accessories whichhave not been tested and approved by ECHO. Read and comply with all safety instructions listed in this manual andsafety manual.• Check unit for loose/missing nuts, bolts, and screws. Tighten and/orreplace as needed.• Inspect fuel lines, tank, and area around carburetor for fuel leaks. DONOT operate unit if leaks are found.• Inspect shield for damage and ensure that the cut-off knife issecurelyin place. Replace if either is damaged or missing.• Check that the cutting attachment is firmly attached and in safeoperating condition.• Check that front loop handle and shoulder strap/ or shoulder/waist harness are adjusted for safe, comfortable operation. SeeAssembly Section for proper adjustment.Repetitive Stress InjuriesIt is believed that overusing the muscles and tendons of the fingers,hands, arms, and shoulders may cause soreness, swelling, numbness,weakness, and extreme pain in those areas. Certain repetitive handactivities may put you at a high risk for developing a Repetitive StressInjury (RSI). An extreme RSI condition is Carpal Tunnel Syndrome(CTS), which could occur when your wrist swells and squeezes a vitalnerve that runs through the area. Some believe that prolonged expo-sure to vibration may contribute to CTS. CTS can cause severe pain formonths or even years.To reduce the risk of RSI/CTS, do the following:• Avoid using your wrist in a bent, extended, or twisted position.Instead try to maintain a straight wrist position. Also, when grasp-ing, use your whole hand, not just the thumb and index finger.• Take periodic breaks to minimize repetition and rest your hands.• Reduce the speed and force with which you do the repetitivemovement.• Do exercise to strengthen the hand and arm muscles.• Immediately stop using all power equipment and consult a doctor ifyou feel tingling, numbness, or pain in the fingers, hands, wrists, orarms. The sooner RSI/CTS is diagnosed, the more likely permanentnerve and muscle damage can be prevented.