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Stationary Engine GX25


Stationary Engine GX25


Perfect for powering Commercial Lawn & Garden Equipment, The ultra-lightweight Stationary Engine GX25 Mini 4-Stroke engine efficiently delivers the kind of efficient, clean, powerful, quiet performance that you’d expect from a larger engine – but in a very compact package.

The GX25 is also well-known for powering Tillers/Cultivators, Water Pumps, Agricultural Equipment and Construction/Industrial Equipment.

When you see the GX25 powering Honda-branded hand-held equipment like brushcutters and blowers, you know you’re getting a premium engine.


The world’s lightest OHC engine, the Honda Mini 4-stroke engine requires no fuel/oil mixing, and runs at approximately half the operating cost of comparable 2-stroke engines.

A full 360° “any-side-up” operation means you can use and store the Stationary Engine GX25 in any position, and take advantage of the exclusive rotary-slinger lubrication system.

The carburettor is equipped with an accelerator pump for fast, easy acceleration, and an efficient port configuration and large diameter valves maximise power output.


An exhaust decompression system and unique low inertia design means the GX25 engine will start first time, every time.

There’s an easily accessible spark plug, and it’s simple to drain and re-fill the oil, so maintenance is a piece of cake.

High quality materials, fit, and finish ensure that your GX25 Mini 4-Stroke can be relied upon whenever you need it.


The GX25, like so many other Honda Engines, is covered by a comprehensive Domestic & Commercial 3 Year Warranty.

Special designs for horizontal and vertical applications are also available, so whatever your application, the GX25 will deliver.


GX25 Power Curve

* 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 3600 rpm. 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.

Engine Type

Air-cooled 4-stroke OHC single cylinder

Bore x Stroke (mm)

35 x 26

Displacement (cc)


Compression Ratio


Starter Type

Recoil / Pull Start


Transistorized magneto

Charge Coil (Amps)

Less than 1

Horsepower Class (hp)


Net Power (kw)

0.72 (1.0HP) at 7000 rpm

Max Torque (Nm)

1.0 at 5000 rpm

Gearbox Reduction and Clutch


Shaft Type

Clutch shoes only, Stepped and Screwed

Shaft Size

N/A, 11.6mm

Shaft Vertical / Horizontal

Horizontal or Vertical

Fuel Type


Fuel Tank Capacity (Ltrs)


Fuel Consumption (L/Hour)

0.54 at 7000 rpm

Oil Capacity (Ltr)


Oil Alert System


Dimensions LxWxH (mm)

192 x 221 x 230

Dry Weight (kg)


Engine Model Variation

SATM (Horizontal Muffler), SUT, WAU (Horizontal Muffler)


Agricultural Equipment, Commercial Lawn and Garden, Construction / Industrial Equipment, Tillers / Cultivators, Water Pumps

Stationary Engine GX25


Meet the world’s lightest OHC engine. Honda applied decades of superior engine technology to create the world’s first 360° inclinable 4-Stroke engines.

Clear selection