The STIHL SR 450 is a versatile, professional-grade backpack sprayer that offers a complete solution for liquid and solid compound distribution. Engineered for high-performance landscaping and agricultural use, this model features a 2-in-1 conversion system that allows you to switch between misting and dusting applications without the need for special tools. Whether you are managing pests in a dense orchard or applying granular treatments to a large estate, the SR 450 delivers relentless power.
Equipped with a high-output, fuel-efficient engine, the STIHL SR 450 provides a 20% greater spray range than previous models, reaching distances up to 48 feet horizontally. This power is balanced by an advanced anti-vibration system and a multi-function control handle, ensuring that even the most demanding jobs are completed with precision and reduced operator fatigue. It also quickly converts into a powerful leaf blower, adding another layer of utility to your equipment lineup.
Notice: This product is not available for purchase or delivery in the state of California.
Key Features & Benefits
Versatile 2-in-1 Distribution
- Liquid to Granular Conversion: Effortlessly switch from misting liquid pesticides to spreading solid fertilizers or seeds with the integrated toolless conversion mechanism.
- Dusting Capabilities: Designed to handle fine powders and granules, making it a favorite for specialized agricultural and pest control applications.
- Integrated Blower Function: The high air volume (542 cfm) allows the unit to double as a powerful backpack blower for seasonal debris cleanup.
Maximum Coverage & Reach
- 48-Foot Spray Range: The powerful 63.3 cc engine provides the velocity needed to reach deep into thick foliage or high into tree canopies.
- Large Capacity Tanks: Features a 3.7-gallon solution container and a 57.5 oz. fuel tank, minimizing downtime for refills during large-scale operations.
- Pressure Pump Compatible: To maintain a consistent discharge rate when spraying at upward angles greater than 30°, this unit can be paired with an optional pressure pump kit.
Professional Ergonomics
- Anti-Vibration System: STIHL’s signature dampening technology reduces engine oscillation, protecting the user’s back and arms during all-day use.
- Multi-Function Control Handle: All essential controls for engine speed and product feed are located on a single handle, ensuring the operator's hand never has to leave the controls.
- Adjustable Support Harness: A padded, ergonomic backpack harness distributes weight evenly across the shoulders and back for improved balance.
Technical Specifications
| Power Source | Gas (50:1 Ratio) |
| Engine Displacement | 63.3 cc (3.9 cu. in.) |
| Maximum Spray Range | 48 ft (Horizontal) |
| Air Volume | 542 cfm (with tubes) |
| Solution Capacity | 3.7 Gallons (14 Liters) |
| Weight | 28.2 lbs. (Dry) |
