Honda GX25

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The Honda GX25 is a 25.0 cm³ mini 4-stroke overhead cam petrol engine manufactured by Honda since 2002. Several versions exist with power output ranging from 600 to 750 watts. All versions are supplied with integrated centrifugal clutch shoes for power take-off


  • Compression ratio: 8.0 : 1
  • Power: 0.7 kW @ 7000 rpm
  • Torque 1.0 Nm @ 5000 rpm
  • Fuel consumption: 0.54 L/h @ 7000 rpm
  • Weight: 2.78 kg[1]


The GX25 is used for commercially produced mini-tillers, water pumps, hedge cutters, string trimmers. A stripped down version of the engine has also been used by hobbyists in model aircraft