Meet the world’s lightest OHC engine.
Honda applied our superior engine technology to create the world’s first 360° inclinable 4-Stroke engines. The ultra-lightweight GX25 Mini 4-Stroke efficiently delivers the kind of efficient cleaner, powerful, quiet performance that you’d expect from a larger engine – but in a very compact package.

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


Advanced Technology
4-stroke – no fuel/oil mixing
Full 360° “any-side-up” operation – use and store in any position
Exclusive rotary-slinger lubrication system
The world’s lightest OHC engine

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

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
CARB and EPA certified
No catalyst necessary

Available Options
Special designs for horizontal and vertical applications available


Specifications Specifications



Additional Information (PDF Files)

Owners Manual