STIHL SR 450 Gas Backpack Sprayer 3.9 HP 14L Mist Blower Duster

Professional Spraying and Dusting Power in One Machine

The STIHL SR 450 Gasoline Backpack Sprayer is engineered for professionals who need maximum versatility, coverage, and productivity. Combining the power of a high-performance mist blower with the convenience of a granular duster, the SR 450 allows operators to switch between liquid and solid applications quickly and easily without special tools or additional equipment.

Powered by a fuel-efficient 3.9 HP (2.9 kW) engine, this professional backpack sprayer generates strong airflow and exceptional spray distance, helping users cover large areas quickly while reducing application time. Whether applying fertilizers, pesticides, herbicides, fungicides, or granular products, the SR 450 delivers consistent, controlled distribution across a wide range of agricultural and landscaping applications.

The large 14-liter (3.7-gallon) chemical tank supports extended work sessions with fewer refills, making it ideal for orchards, vineyards, nurseries, farms, greenhouses, golf courses, parks, and commercial landscaping projects. Its powerful air system provides a maximum horizontal spraying distance of approximately 14.5 meters (47.5 feet) for efficient treatment of trees, shrubs, crops, and large vegetation areas.

Designed for all-day comfort, the SR 450 features an adjustable backpack harness that distributes weight evenly across the shoulders and back, while the STIHL Anti-Vibration System helps reduce operator fatigue during extended use. The ergonomic control handle keeps all essential controls within easy reach, allowing precise adjustment of product feed and airflow without removing your hand from the handle.

Built with STIHL’s renowned durability and professional-grade engineering, the SR 450 is the ideal solution for users who need a reliable, high-capacity sprayer capable of handling both liquid and granular applications with outstanding efficiency.

Key Features & BenefitsPowerful 3.9 HP Engine

• High-performance low-emission gasoline engine

• Strong airflow for extended spray range

• Fuel-efficient operation

• Professional-grade reliability

Liquid & Granular Application Capability

• Sprays liquids and distributes granular products

• Tool-free conversion between misting and dusting

• No additional equipment required

• Exceptional versatility for multiple applications

Large 14L / 3.7 Gallon Tank

• Extended operating time between refills

• Ideal for large properties and commercial work

• Reduces downtime

• Improves productivity

Long-Range Coverage

• Maximum horizontal spray distance of approximately 14.5 m (47.5 ft)

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