Model GWP20CX GWP30CX GWP40CX Type Self-priming centrifugal pump Suction*delivery(mm)(inch) 50*50  2*2 80*80  3*3 100*100  4*4 Engine model GE168F GE168-2 GE188 Engine output (HP) 5.5 6.5 13 Displacement: (m³/h) 36 60 80 Lift: (m) 46 32 28 Suction: (m) 8 Fuel tank capacity (L) 3.8 3.8 6 Pipe diameter: (mm) 22 25 25 Starting system Recoil (Electric Start as optional) Dimension (L *W * H) mm 525*405*435 550*450*450 625*460*555 Net Weight (kg) 24 28 69 Gross Weight (kg) 25 30