... ,air-cooled 2.fuel:gasoline 3.displacement:389ml 4.power output:9.5kw/3600rpm Engine 13HP Certification:ISO9001, EPA, CE, GSType ... singel cylinder,OHV25°,4-stoke,Air-cooledBore X Stroke 88mm x ... 64mmDisplacement 389ml Compression Ratio 8.0:1Max Power Output 9.5kw ...