Item No.: YD-72 Engine Model: 1E46F Power Type: Single cylinder, Two-stroke, Air-cooling gasoline engine Cylinder diameter X Stroke: 52mmX34mm Ignition system: CDI Engine displacement: 72.2cc Maximum shaft brake power: 3.5kw Engine speed: Maximum speed with cutting attachment: 13000r/min Maximum idling speed: 2800r/min Minimum clutch engagement spped: 4000r/min Fuel mixture ratio: 25:1(Gasoline 25: Two-cycle oil 1) Chain oil: Motor oil SAE 10W-30 Fuel tank capacity: 680ml Oil tank capacity: 360ml Guide bar size: 20"/22" Chain pitch: 0.325" Chain gauge: 0.058" G.W/N.W: 6.7/8.7KG External dimension: LXWXH 450mmx300mmx310mm