2018 Honda Engines GX240

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Honda Engines



With the GX240, you're looking at one of the best engines in the business. More power. Quieter performance. Lower fuel consumption. Lower emissions. Better features. Exceptional performance. Honda's GX series lives up to the legend, and then some.

Common Applications
  • Pressure washers
  • Commercial lawn and garden equipment
  • Tillers / cultivators
  • Generators
  • Construction / industrial equipment
  • Agricultural equipment
  • Small vehicles
  • Water pumps
Fuel Efficient, High Output Operation
  • Digital CDI ignition system with variable timing
  • Increased compression ratio
  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency
  • OHV design for increased efficiency and optimal power transfer
Smooth Performance
  • Precision engineered components result in lower vibration
  • Ball bearing supported crankshaft for greater stability
  • Heavy duty balancer shaft
  • Improved piston design
Exceptionally Quiet
  • Large capacity, multi-chamber exhaust system
  • Improved camshaft and muffler reduce overall engine noise by up to 5 dB
  • Reduced mechanical noise due to piston design
  • Forged steel crankshaft and rigid crankcase
  • Helical cut gears
  • Sophisticated air intake system
Proven Reliability
  • Oil Alert
  • Cast iron cylinder sleeve
  • High quality materials, fit, and finish
  • Dual element air cleaner
  • Fuel Valve
  • 3-Year Limited Warranty
Easy to Use and Maintain
  • Simple throttle control
  • Large fuel tanks
  • Large automotive type fuel cap
  • Dual oil drains and fill
  • Easy, convenient, heavy duty control box
  • Easily accessible spark plug
Easy Starting
  • Heavy duty recoil starter
  • Automatic mechanical de-compression system
  • Variable ignition timing
Emissions Compliant
  • CARB and EPA certified
  • No catalyst necessary
Available Options
  • Low profile versions
  • Gear reduction options
  • Electic start
  • Spark arrester available
  • Charge and lamp coils with multiple output options available
  • Cyclone Air Cleaner available
  • Engine Type: Air-cooled 4-stroke OHV
  • Bore x Stroke: 73 X 58 mm
  • Displacement: 270 cm3
  • Net Power Output*: 7.9 HP (5.9 kW) @ 3,600 rpm
  • Net Torque: 13.5 lb-ft (18.3 Nm) @ 2,500 rpm
  • PTO Shaft Rotation: Counterclockwise (from PTO shaft side)
  • Compression Ratio: 8.5:1
  • Lamp/Charge coil options: 25W, 50W / 1A, 3A, 10A, 18A
  • Carburetor: Butterfly Float Type
  • Ignition System: Digital CDI with variable ignition timing
  • Starting System: Recoil/electric
  • Lubrication System: Splash
  • Governor System: Centrifugal Mass Type
  • Air cleaner: Dual element
  • Oil Capacity: 1.16 US qt (1.1 L)
  • Fuel Tank Capacity: 5.6 U.S. qts (5.3 liters)
  • Fuel: Unleaded 86 octane or higher
  • Dry Weight: 55.1 to 66.1 lb (25 to 30 kg)
  • Length (min): 15.0" (380 mm)
  • Width (min): 16.9" (429 mm)
  • Height (min): 16.6" (422 mm)
PTO Shaft Options
  • E type: Tapered shaft
  • H type: Reduction type PTO
  • L type: Reduction type PTO
  • P type: Threaded type (SAE)
  • Q type: Straight shaft
  • R type: Reduction type PTO
  • V type: Tapered shaft
*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.



Engine Type
Air-cooled 4-stroke OHV
Bore x Stroke
73 x 58 mm
270 cm3
Compression Ratio
7.9 hp (5.9 kW) @ 3,600 rpm
13.5 lb.-ft (18.3 Nm) @ 2,500 rpm
Fuel Capacity
5.6 U.S. qt. (5.3 L)
Starting System


15.0 in. (380 mm)
16.9 in. (429 mm)
16.6 in. (422 mm)
55.1 to 66.1 lb. (25 to 30 kg)

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