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When cutting a limb that is under tension, be alert for spring back so that you will not be struck when the tension in the wood fibers is released. 15. Keep the handles dry, clean and free of oil or fuel mixture. .6 . 4. For safe operation 16. Operate the chain saw only in well ventilated areas. Never start or run the engine inside a closed room or building. Exhaust fumes contain dangerous carbon monoxide. 17. Do not operate a chain saw in a tree unless specially trained to do so. 18. Guard agai