gasoline engine single-cylinder,air-cooled,four-stroke,OHV ,31cc MODEL:YL139F/Ptype:single-cylinder,air-cooled,four-stroke,OHVcrankshaft direction:clockwise from flywheel endlgnition ... /6500rpmconsumption rate of fuel:≤480g/kw.hbore*stroke:39*26displacement:31ccfuel tank capacity:0.9Lnet weight:4kgdimensions:270*260*210mm 4-stroke 31cc Gasoline engine (139F)