Engine Type: Single-cylinder, air-cooled, 2-stroke petrol engine.Displacement: 65 cc, delivering an output of roughly 3.4 kW (4.6 HP).Bar Capacity: Typically comes with a 20-inch (50 cm) high-tensile steel guide bar.Fuel Requirements: Unleaded petrol mixed with 2-stroke engine oil at a 25:1 or 50:1 ratio depending on oil quality.Key Features: Side-mounted chain tensioning, CDI electronic ignition system, and an automatic adjustable oil pump for constant chain lubrication.