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 & Benefits

Powerful 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)

• Efficient treatment of trees, shrubs, and crops

• Covers large areas quickly

• Reduces walking time

Comfortable Backpack Design

• Adjustable support harness

• Even weight distribution across shoulders and back

• Improved comfort during long work sessions

• Reduced operator fatigue

STIHL Anti-Vibration System

• Minimizes vibration transferred to the operator

• Enhances comfort and control

• Ideal for extended professional use

Ergonomic Control Handle

• All controls within easy reach

• Precise adjustment of airflow and product feed

• One-handed operation

• Increased efficiency and convenience

Professional Durability

• Heavy-duty construction

• Built for daily commercial use

• Reliable performance in demanding environments

• Long service life

Ideal Applications

The STIHL SR 450 is perfect for:

• Crop spraying

• Orchard and vineyard treatment

• Fertilizer application

• Herbicide spraying

• Fungicide and pesticide application

• Granular fertilizer spreading

• Landscaping and turf management

• Nursery and greenhouse operations

• Golf course maintenance

• Park and municipal maintenance

• Forestry applications

• Mosquito and pest control

• Large property management

Technical Specifications

Why Choose the STIHL SR 450?

✔ Powerful 3.9 HP professional engine

✔ Handles both liquid spraying and granular spreading

✔ Tool-free conversion between applications

✔ Large 14-liter tank for extended operation

✔ Long-range spray coverage up to 14.5 meters

✔ Comfortable backpack harness system

✔ STIHL Anti-Vibration technology

✔ Precise airflow and feed control

✔ Ideal for agriculture, landscaping, and pest control

✔ Built for demanding professional use

✔ Fuel-efficient, low-emission performance

✔ Trusted STIHL durability and reliability