51cc chain saw Engine:air-cooling,2-stroke,single cylinder gasoline 51cc chain saw Egine:air-cooling,two-stroke,signle cylinder gasoline Displacement:51CCEngine power:2.2kwRelevent speed:7000r/minIdle speed:2800r/minBar size:450/500/558mm(18"/20"22")Chain pitch:0.325"Machine weight:8kgPacking size:530*260*290* 51cc chain saw