• GX35 Engine Winnipeg and Regina
  • GX25 Engine Dimensions Diagram
  • GX25 Performance Curve

Honda GX25 Engine – Horizontal Crankshaft

Quality and performance come standard.
Honda applied our superior engine technology to create the world’s first 360° inclinable 4-Stroke engines. The ultra-lightweight GX25 Mini 4-Stroke efficiently delivers the kind of efficient, clean, powerful and quiet performance that you’d expect from a larger engine, but in a very compact package.

Common Applications:

  • Commercial lawn and garden equipment
  • Tillers/cultivators
  • Construction/industrial equipment
  • Agricultural equipment
  • Water pumps


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Spec Sheet
Engine Type Air-cooled 4-stroke OHC
Bore x Stroke 35 mm x 26 mm
Displacement 25 cm3
Net Power Output* 1.0 HP (.72 kW) @ 7,000 rpm
Net Torque 0.74 lb-ft (1.0 Nm) @ 5,000 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.0:1
Fuel Tank Capacity 0.58 litres (0.61 U.S. qts)
Lamp/Charge coil options N/A
Carburetor Diaphragm-type (overflow return)
Ignition System Transistorized magneto
Starting System Recoil
Lubrication System Crankcase pressure driven
Governor System N/A
Air Cleaner Semi-dry
Oil Capacity 80cc (2.7 U.S. oz)
Fuel Unleaded 86 octane or higher
Dry Weight 2.7 kg (6.8 lbs)
Length (min) 192 mm (7.6″)
Width (min) 221 mm (8.7″)
Height (min) 230 mm (9.1″)