Make light work of hard tasks.

Honda's GX50 general-purpose engine expands our Mini-Four Stroke lineup with a model that offers high output and light weight—extending into more demanding commercial and rental applications with excellent fuel efficiency. Featuring a compact and lightweight design, the GX50 is the first Honda four-stroke model in the two-horsepower class that is 360-degrees inclinable during operation and storage.

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


Advanced Technology
  • 4-stroke - no fuel/oil mixing
  • Higher output engine, with a power-to-weight ratio matched to leading two-stroke models
  • Full 360° "any-side-up" operation - use and store in any position
  • Exclusive rotary-slinger lubrication system
Fuel Efficient, High Output Operation
  • Approximately half the operating cost of comparable 2-stroke engines
  • Efficient port configuration and large diameter valves maximize power output
  • Lighter, more rigid valve train
  • Carburetor equipped with accelerator pump for fast, easy acceleration
Smooth Performance
  • Precision engineered components result in lower vibration
  • Lighter piston minimizes vibration
  • Ball bearing supported crankshaft for greater stability
  • Roller bearing supported connecting rod
Exceptionally Quiet
  • Belt-driven OHC design reduces mechanical noise
  • Large capacity, multi-chamber exhaust system
  • Sophisticated air intake system
Proven Reliability
  • High quality materials, fit, and finish
  • Lifetime timing belt design
  • Integrated fuel system protection
  • Diaphragm carburetor
  • Scratch-resistant Bridge Guard Design provides stability and protects the engine cowling in upside down positions
Easy to Use and Maintain
  • Easily accessible spark plug
  • Easy to drain and re-fill oil
  • No mixing of gas and oil
Easy Starting
  • Exhaust decompression system
  • Unique low inertia design
Emissions Compliant
  • No catalyst necessary
Available Options
  • Special designs for horizontal and vertical applications available



Engine Type Air-cooled 4-stroke OHC
Bore x Stroke 43 mm x 33 mm
Displacement 47.9 cm3
Net Power Output* 2.0 hp (1.47 kW) @ 7,000 rpm
Net Torque 1.6 lb-ft (2.2 Nm) @ 5,000 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.0:1
Carburetor Diaphragm-type (overflow return)
Ignition System Transistorized magneto
Starting System Recoil
Lubrication System Crankcase pressure–driven
Governor System NA
Air Cleaner Dry Paper
Oil Capacity 4.4 US oz (130cc)
Fuel Unleaded 86 octane or higher
Fuel Tank Capacity 0.67 U.S. qt (.63 liter)
Dry Weight 9.1 lb (4.1 kg)
WARNING: California Prop 65 Info



Length (min) 7.8" (199 mm)
Width (min) 10.2" (260 mm)
Height (min) 10.4" (263 mm)

Performance Curves

GX50 Performance Curve

The SAE J1349 standard measures net horsepower with the manufacturer’s production muffler and air cleaner in place.Net horsepower more closely correlates with the power the operator will experience when using a Honda engine powered product.The power rating of the engines indicated in this document measures the net power output at 3600 rpm(7000 rpm for model GXH50, GXV50, GX25 and GX35) and net torque at 2500 rpm, as tested on a production engine. 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 operation speed of the engine in application, environmental conditions, maintenance and other variables.