Specifications, descriptions and illustrative material in this literature are as accurate as known at the timeof publication, but are subject to change without notice. Illustrations may include optional equipment andaccessories, and may not include all standard equipment.Instruction ManualX7503274200© 11/2014 ECHO Inc.x7722271404 / x772000164CS-310CHAIN SAWBurn HazardThe muffler or catalytic muffler and surrounding cover may become extremely hot.Always keep clear of exhaust and muffler area, otherwise serious personal injury mayoccur.The engine exhaust from this product contains chemicals known to the State of California to causecancer, birth defects or other reproductive harm.Users of this equipment risk injury to themselves and others if the unit is usedimproperly and/or safety precautions are not followed. ECHO provides an operator’smanual and a safety manual. Both must be read and understood for proper and safeoperation. Failure to do so could result in serious injury.