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SR 450
A powerful backpack sprayer/duster that easily converts from liquid to granular applications.
The STIHL SR 450 is a professional-grade sprayer that covers all the bases. Its low exhaust emission, fuel-efficient engine delivers a 20% greater spray range when compared to previous models. Ideal for distributing liquid or solid compounds, this backpack sprayer/duster converts from misting to dusting applications without any special tools or additional equipment. It’s easy to use and provides excellent control over product feed and air speed.
Specifications:
| POWER SOURCE | Gas |
| WEIGHT | 28.2 lbs. |
| CONTAINER CAPACITY | 3.7 gal. |
| MAXIMUM SPRAY RANGE | 48 ft. |
| AIR VOLUME | 542 cfm |
| ENGINE POWER | 3.9 bhp |
| FUEL CAPACITY | 57.5 oz. |
| DISPLACEMENT | 63.3 cc |
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Anti-Vibration System -
The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience. -
Multi-Function Control Handle -
Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operator’s hand never has to leave the handle. -
Adjustable Support Harness -
STIHL backpack blowers and sprayers are equipped with an adjustable support harness that distributes weight evenly across the shoulders and back, reducing user fatigue.





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