Honda Engines GX100 Series General Purpose Horizontal Shaft Engine 100 ccm, 2 19/64 x 5/8 GX100UQA2

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30.00 LBS
Calculated at Checkout
  • Honda GX100
  • Honda GX100- Automatic mechanical decompression for easier starting
  • Honda GX100- Precision Camshaft Design
  • Honda GX100- Superior Air Filtration Systems
  • Honda GX100- Oil Alert shuts the engine off when the oil level reaches an unsafe level.


Professionals rely on the GX100 to deliver reliable, easy starting, fuel efficient performance, day in and day out.

Common Applications

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

Fuel Efficient, High Output Operation

  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency
  • OHV design for increased efficiency and optimal power transfer
  • High compression ratio for better fuel efficiency

Smooth Performance

  • Precision engineered components result in lower vibration
  • Ball bearing supported crankshaft for greater stability


Exceptionally Quiet

  • Large capacity, multi-chamber exhaust system
  • Reduced mechanical noise due to light weight, noise-reducing materials
  • Forged steel crankshaft and rigid crankcase
  • Sophisticated air intake system

Proven Reliability

  • Oil Alert
  • Cast iron cylinder sleeve
  • High quality materials, fit, and finish
  • Fuel Valve

Easy to Use and Maintain

  • Large fuel tanks
  • Large automotive type fuel cap
  • Easily accessible spark plug

Easy Starting

  • Heavy duty recoil starter
  • Automatic mechanical de-compression system

Emissions Compliant

  • CARB and EPA certified
  • No catalyst necessary

Available Options: Spark arrester available


Engine Type

Air-cooled 4-stroke OHC

Bore x Stroke

56 X 40 mm


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



Float Type

Ignition System

Transistorized magneto

Starting System


Lubrication System


Governor System

Centrifugal Mechanical

Air cleaner

Dual element

Oil Capacity

0.42 US qt (0.40l)

Fuel Tank Capacity

0.81 U.S. qt (0.77 liter)


Unleaded 86 octane or higher

Dry Weight

23.4 lb (10.6 kg)


Length (min)

11.6" (295mm)

Width (min)

12.0" (304mm)

Height (min)

15.8" (402mm)

PTO Shaft Options

K type

Rammer type

Q type

Straight shaft

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.

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