1.25 kW
25.4cc - 1.7HP
2-STROKE MIXTURE
The Active ST 25 Evolution GM engine represents a perfect balance between power and handling, designed to meet the needs of both professionals and the most demanding private users. With its compact design and a power of 1.7 HP, this 2T engine is one of the most versatile tools in its category, ideal for intensive and prolonged work without sacrificing comfort.
Entirely designed and manufactured in Italy, the ST 25 Evolution engine group is the perfect choice for those looking for excellent performance in a lightweight and reliable product.
Can be combined with PRUNING, HEDGE TRIMMER, BRUSHCUTTER, HOE and RECIPROCATOR accessories
COMPLETE MULTITOOL version available
Selectable from drop-down menu, motor body:



The 2T engine with Strato Charged technology ensures more efficient combustion, lower emissions and reduced consumption. This innovation makes the Active ST25 Evolution engine group ideal for those seeking sustainability without sacrificing performance. The Active ST25 engine group offers a power of 1.7 HP with a displacement of 25.4 cc . This makes it effective in every type of cutting, from finishing edges to cleaning difficult areas.


Aluminum alloy crankcase and cylinder with Strato-Charged technology
The model mounts a 24 mm shaft with a 7 mm thickness , WT carburetor and paper air filter. The 54 mm clutch ensures smooth transmission, while the Easy Start system facilitates starting even when cold. The 0.6 L tank offers good autonomy. The Easy harness ensures comfort during use. Even without TDS or Rotofix anti-vibration , the work remains precise and controlled. An ideal machine for any operating context.

Its versatility also extends to the use of multi-function tools, making it ideal for a wide range of applications, from gardening to the maintenance of the most complex terrains.

For 30 years, Active has been the Made in Italy company specialized in the production of engines and equipment for gardening and agriculture , such as brush cutters , chainsaws and lawnmowers , offering products of excellent quality. The continuous research and development of new technologies allows this 100% Italian brand to stand out among the leaders in the sector, combining innovation , sustainability and superior performance .
| Model | ST25 EVOLUTION Engine Body |
| Code | 1252010 |
| Power Supply | Mixture |
| Engine Type | Active 2 Stroke |
| Displacement | 25.4cc |
| Power | 1.7 HP - 1.25 kW |
| Carburetor | Walbro WT |
| Reservoir | 0.6 L |
| Rod Diameter | Ø 24 mm |
| Rod Thickness | 7mm |
| Clutch | Ø 54 mm |
| Grass Disc | NO |
| Rotofix | NO |
| TDS Anti-Vibration System | NO |
| Easy Start | YES |
| Strap | Easy |
| Handle | Single |
| Weight | 4.3 kg |
| Model | ST25 EVOLUTION Engine Body |
| Code | 1252010 |
| Power Supply | Mixture |
| Engine Type | Active 2 Stroke |
| Displacement | 25.4cc |
| Power | 1.7 HP - 1.25 kW |
| Carburetor | Walbro WT |
| Reservoir | 0.6 L |
| Rod Diameter | Ø 24 mm |
| Rod Thickness | 7mm |
| Clutch | Ø 54 mm |
| Grass Disc | NO |
| Rotofix | NO |
| TDS Anti-Vibration System | NO |
| Easy Start | YES |
| Strap | Easy |
| Handle | Single |
| Weight | 4.3 kg |
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