... warranty 4)CE.EPA.GS,ISO 7.0Hp gasoline engine HG170F,gasoline engine,power engine ModelHG170FTypeSingle cylinder,OHV25.,4-Stroke,Air-cooledBore×Stroke(mm ... )70mm×54mmDisplacement207mlCompression Ratio8.0:1Max Power Output(HP/rpm) 7.0HP/3600rpmRecommded power ...