premium2- stroke chain saw engine with light volume weight,flexible convenient operation,adopted the tension adjust construction Technical Specification:Chain Type:Single Cylinder,Two-stroke air-coolling gasoline engineDisplacement:25.4CCRated Output Power and Relevant Speed:0.9kw/7000rpmFuel Mixture Ratio:25:1Chain oil:special oil for two -cycle engineFuel Tank Capacity:230mlEngine Oil Tank ...