... , 4-stroke, air-cooled, direct injection, Diesel engine: single cylinder, 4-stroke, air-cooled, direct injection, MODELLD170F/LD170FELD178F/ ... /LD186FELD186FA/LD186FAERated Output Power [kW (Hp)2.5(3.4)2.8(3.8)3.7(5.03)4.0(5.44)5 ... .7(7.75)6.3(8.57)5.9(8.02)6.5(8.85)Engine Speed (rpm)30003600 3000 3600 ... -cooled, Direct injection, diesel engineBore x Stroke [mm (in)]70 x 55 (2.76 x 2.17)78X62(3.07 X 2 ...