single cylinder,air-cooled,4-stroke,gasoline engine Axial Pump GE168-1 Model GG-WP80E GG-WP100E Pump ... Pressure 20Mpa(2900PSI) 30Mpa(4350PSI)Engine Type OHV25°Tilt,single cylinder,air-cooled,4-stroke,gasoline engineDisplacement 163cc 389cc Staring System Recoil ... 3.6L 6LOil Volume 0.6L 1.1LFuel Type Unleaded Gasoline Unleaded GasolineAmblent 0°C-60°C 0°C-60°CDry ...