Diesel Engine1500/1800rpm 5HP, 7HP, 10HP CE, EPA approval ... Type Single cylinder,vertical,direct injection,4-stroke,air cooled diesel engine Bore×stroke(mm) 70×55 78×62 86×70 ... 296 406 Compression ratio 20:01 20:01 20:01 Engine speed(rpm) 1500/1800 1500/1800 1500/1800 Continuous ... 0.75 1.1 1.65 Crankshaft direction Counterclockwise from flywheel end Cooling type Force air-cooled Lubrication type Pressure ...