13Hp Vertical Shaft Twin-Cylinder Gasoline Engine Model IP90F Cycle: Four stroke/two stroke Four stroke Bore(mm) 90 Stroke(mm) 68 Number and layout of cylinders: 1 Engine capacity(cc) 432 Rated speed(rpm) 2800 Iding speed(rpm) 1850 Max power(Kw) 8.9KW/3600rpm Maximum torque speed(rpm 25.5N.m/2600rpm Maximum compression ratio 8.2 Combustion system description Spark ignition Max charge pressure 14.5V Overall Size(LXWXH)(mm) 430x417x382 Crankshaft PTO(diameterxlength)(mm) 25.4x79.5 Crankshaft Keyway(mm) 6.34 Crankshaft Threads(intemal) 7/16-20 UNF-2B Weight dry(KG) 31