[. . . ] When using an electrical trimmer, basic precautions should always be followed to assure maximum safety and optimum performance. Failure to comply with instructions may result in electrical shock, burns, fire, or personal injury. mINIMUM WIRE GAUGE RECOMMENDATIONS VOLTS 120 EXTENSION CORD LENGTH 25 feet / 7. USE TRIMMER CORRECTLY - Use this trimmer only for its intended use as described in this manual. [. . . ] Inspect extension power cord for loose or exposed wires and damaged insulation. DO NOT ABUSE CORD - Never carry trimmer by cord or pull cord to disconnect from outlet. For service information, contact the McCulloch Product Service Department listed on the back cover of this User Manual. RISK OF EYE INJURY - Always wear goggles or other suitable eye protection when operating your trimmer. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. KEEP AREA CLEAR - Keep everyone, especially children and pets away from the area of operation. Never allow children to operate the trimmer to be used as a toy or to run unattended at any time. AVOID A DANGEROUS ENVIRONMENT - Do not use in the presence of flammable liquids or gases, smoking or burning materials to avoid creating a fire or explosion. Never operate the trimmer in wet or damp conditions or around swimming pools, hot tub, etc. Use of these personal safety items is highly recommended to reduce the risk of accidental injury (Figure 2-2). Use of these personal safety items is highly recommended to reduce the risk of accidental injury. NOTE: The only assembly required for your trimmer is to install the edge guide wheel, debris shield and adjust the assist handle. Position the unit with the string head carrier facing up Align disposable string head locking tabs with corresponding slots in carrier as shown (Figure 3-2A). With firm pressure push disposable string head onto carrier until an audible click is heard. Press yellow button on side of string head to eject used REX disposable string head (Figure 3-2B). To avoid serious personal injury, shut unit off before removing or installing attachment. NOTE: To make installing or removing the attachment easier, place the unit on the ground or on a work bench. While firmly holding the attachment, push it straight into the coupler until the release button appears in the primary hole of the coupler. Position the motor housing with string head carrier facing up (Figure 3-1A). The release button must be in the primary hole and the knob securely tightened before operating this unit. All attachments are designed to be used in the primary hole unless otherwise indicated in the specific attachments operators manual. If the incorrect hole is used, it could result in injury, or damage to the unit. [. . . ] Any failure that results from an accident, User abuse, neglect or failure to operate the product in accordance with the instructions provided in the User Manual(s) supplied with the product, or that results from improper servicing by an unauthorized repair facility. Normal adjustments which are explained in the User Manual(s) provided with the product. Any component(s) or accessories not sold or manufactured by the Warrantor. This warranty does not apply to accessories, normal maintenance or adjustment(s) of the product set forth in the User Manual(s). [. . . ]