CS-310 OPERATIONX7503275401 29© 02/2019 ECHO Inc.Engine exhaust IS HOT, and contains Carbon Monoxide (CO), apoison gas. Breathing CO can cause unconsciousness, seriousinjury, or death. Exhaust can cause serious burns. ALWAYSposition unit so that exhaust is directed away from your faceand body.Operation of this equipment may create sparks that can startfires around dry vegetation. This unit is equipped with a sparkarrestor to prevent discharge of hot particles from the engine.Metal cutters can also create sparks if the cutter strikes rocks,metal, or other hard objects. Contact local fire authorities forlaws or regulations regarding fire prevention requirements.Winter OperationAir cleaner cover - Use the winterplug (A) to prevent carburetor troublein winter.• Remove air cleaner cover. Removeplug from warm weather position(B), and install into cold weatherposition (C).Note: For operation at normaltemperature (5°C [41°F])return the plug to its original position. To prevent over heatingof the engine.Starting Cold EngineMake sure the bar and chain are free from anyobstruction when starting the chain saw.ACB