... ,air-cooled ,OHV, Horizontal side shaft,Auto-Speed gasoline engine with CE,CCC,ISO9001certifications Gasoline Engine ModelDB-168FDB-168FADB-168-1DB-170FDB-177FDB-188F ... 4568×4570×5477×5888×6490×64Displacement(cc)163163196210270389407Compression Ratio8.5:18.5:18.5:18.5:18.2:18.0:18.0:1Max.Power ... power(4.0HP)3.0(4.0HP)3.0(5.8HP)4.3(6.0HP)4.4(7.4HP ... )5.5(11.7HP)8.6(13HP)9.6Max.Torque(N. ...