Model 460 Chain Saw runs on 3.7-hp., X-TORQ engine. Reduces fuel consumption by up to 2% and emissions by up to 60%. Features precision-forged, 3-piece crankshaft; heavy-duty muffler; and metal clutch cover. LowVib anti-vibration system helps isolate handles from the engine, resulting in low vibration levels. Air injection system removes up to 97% of debris before it enters air filter Includes air purge, decompression valve, and combined choke/stop control, self-regulating chain lubrication, side-access chain tensioner, and inertia-activated chain break.