... type small diesel engine single-cylinder,air-cooled,four-stroke,swirl chamber diesel engine 20GP:504PCS Model: YL-170F diesel engine ... .5HP)Type: Single-cylinder, , 4-stroke air-cooled diesel engine swirl chamberBore X Stroke(mm) 70*54 Engine Speed(rpm) 3600 ... Dimension(mm) 395x305x361Net weight(kg)20 Air-cooled,four-stroke swirl chamber Small diesel engine (3.5HP,4.5HP)