This is Echo's lightest 50cc chain saw on the market. Decompression valve for easy starting. Automatic, adjustable clutch-driven oiler for reduced oil consumption. Two-piece air filter for easy cleaning, G-Force Engine Air Pre-Cleaner™ for longer air filter life. Tool-less air filter cover for easy access to air filter. Side-access chain tensioner for easy chain adjustment. Replaceable roller-type chain catcher protects chain drive link from damage if chain derails. Choke with automatic fast idle for easy starting, spring vibration reduction system for operator comfort.