... Reliable work 3. Low fuel consumption 4. Reduce emission pollution 5. High economic performance ModelHH168Engine typeAir cooled, 4 stroke, OHV ... single cylinderBore×Stroke68mm×45mmDisplacement163ccCompression ratio8.5:1Max power output5.5HP/3600 rpmMax torque10.8N.m/ ... starter, ergonomic, easy to grip recoil rope design, and automatic mechanical de-compression system.