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Honda GX100 Engine – Horizontal Crankshaft

Quality and performance come standard.
Professionals rely on the GX100 to deliver reliable and easy starting, along with fuel-efficient performance, day in and day out.

Common Applications:

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


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Spec Sheet
Engine Type Air-cooled 4-stroke OHC
Bore x Stroke 56 mm x 40 mm
Displacement 98 cm3
Net Power Output* 2.8 HP (2.1 kW) @ 3,600 rpm
Net Torque 4.2 lb-ft (5.7 Nm) @ 3,600 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.5:1
Fuel Tank Capacity 0.77 litres (.81 U.S. qts)
Carburetor Float type
Ignition System Transistorized magneto
Starting System Recoil
Lubrication System Splash
Governor System Centrifugal mechanical
Air Cleaner Dual element
Oil Capacity 0.40 litres (0.42 U.S. qts)
Fuel Unleaded 86 octane or higher
Dry Weight 10.6 kg (23.4 lbs)
Length (min) 295 mm (11.6″)
Width (min) 304 mm (12.0″)
Height (min) 402 mm (15.8″)

*The power rating of the engine indicated in this document is the net power output tested on a production engine for the engine model and measured in accordance with SAE J1349 at 3,600 rpm (net power) and at 2,500 rpm (max net torque). Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance, and other variables.