ECHO CS-7310P Chainsaw Whether you're felling trees or harvesting firewood, the CS-7310P is strong, durable, and ready to work for as long as you want. Features Has a 73.5 cc professional-grade, two-stroke engine for superior performance and durability Has an automatic and adjustable clutch-driven oiler that reduces oil consumption by operating only when the chain moves Its aluminum handle with a rubber grip offers lightweight strength and enhanced control Its four-stage air cleaning system cleans intake air and reduces air filter maintenance It has 19 mm captive bar nuts that prevent hardware losses Its decompression valve reduces rope-pulling effort, enabling easier starts It features a winter operation plug that can adjust the opening of the air box for better operation in summer or winter Has a three-point spring vibration-reduction system that ensures operator comfort