Honda Engines

GX25

Horizontal Crankshaft

 

Ultra-lightweight, but with the power and performance you’d expect in a larger engine.

Horizontal Crankshaft

From rugged cast-iron cylinder sleeves to lightweight overhead camshaft designs.

GX25 Specifications
Print PDF

Dimensions diagrams

Enlarge

Common model dimensions illustrated above. Model specific dimensions available in the "Downloads" menu.

Performance Curve

Enlarge

SPECIFICATIONS

Engine Type Air-cooled 4-stroke OHC
Bore x Stroke 35 mm x 26 mm
Displacement 25 cm3
Net Power Output* 1.0 HP (.72 kW) @ 7,000 rpm
Net Torque 0.74 lb-ft (1.0 Nm) @ 5,000 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side)
Compression Ratio 8.0:1
Fuel Tank Capacity 0.58 litres (0.61 U.S. qts)
Lamp/Charge coil options N/A
Carburetor Diaphragm-type (overflow return)
Ignition System Transistorized magneto
Starting System Recoil
Lubrication System Crankcase pressure driven
Governor System N/A
Air Cleaner Semi-dry
Oil Capacity 80cc (2.7 U.S. oz)
Fuel Unleaded 86 octane or higher
Dry Weight 2.7 kg (6.8 lbs)

DIMENSIONS

Length (min) 192 mm (7.6")
Width (min) 221 mm (8.7")
Height (min) 230 mm (9.1")

PTO SHAFT OPTIONS

A2 type N/A
AR type N/A
B type N/A
D type N/A
E type N/A
H type N/A
K type N/A
L type N/A
N1 type N/A
N5 type N/A
N7 type N/A
P type N/A
Q type N/A
R type N/A
S type N/A
S3 type N/A
T type N/A
V type N/A

*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 3,600 rpm (net power) and at 2,500 rpm (max net torque). 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.

  • Service & Warranty

    You can rely on Honda dealers and Honda Genuine Parts.

    Keeping your Honda healthy is an imperative part of maintaining the quality, reliability and performance of your engine.

    Learn More
  • You May Also Consider