1. Mini 4-Stroke Series
  2. GX25

Honda Engines GX25

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Availability
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Manufacturer
Honda Engines
Model
GX25

Overview

Description

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
  • Construction / industrial equipment
  • Tillers / cultivators
  • 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
  • Roller bearing supported connecting rod
  • Ball bearing supported crankshaft for greater stability
Exceptionally Quiet
  • Belt-driven OHC design reduces mechanical noise
  • Sophisticated air intake system
  • Large capacity, multi-chamber exhaust 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
  • 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
  • Carburetor: Diaphragm-type (overflow return)
  • Ignition System: Transistorized magneto
  • Starting System: Recoil
  • Lubrication System: Crankcase pressure-driven
  • Governor System: NA
  • Air Cleaner: Semi-dry
  • Oil Capacity: 2.7 US oz (80cc)
  • Fuel: Unleaded 86 octane or higher
  • Fuel Tank Capacity: .61 U.S. qt (0.58 liter)
  • Dry Weight: 6.8 lb (2.7 kg)
Dimensions
  • Length (min): 7.6" (192mm)
  • Width (min): 8.7" (221mm)
  • Height (min): 9.1" (230mm)

Specs

Engine

Engine Type
Air-cooled 4-stroke OHC
Bore x Stroke
35 mm x 26 mm
Displacement
25 cm3
Compression Ratio
8.0:1
Horsepower
1.0 hp (.72 kW) @ 7,000 rpm
Torque
0.74 lb.-ft (1.0 Nm) @ 5,000 rpm
Fuel Capacity
.61 U.S. qt. (0.58 L)
Starting System
Recoil

Dimensions

Length
7.6 in. (192mm)
Width
8.7 in. (221mm)
Height
9.1 in. (230mm)
Weight
6.8 lb. (2.7 kg)

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