STIHL SR 450 Backpack Sprayer & Duster – 63.3cc

The STIHL SR 450 Backpack Sprayer and Duster is a professional-grade gas-powered application tool designed to distribute both liquid and granular materials. Its quick 2-in-1 conversion system lets operators switch between spraying and dusting applications without special tools or separate equipment.

Powered by a 63.3 cc engine producing 3.9 bhp, the SR 450 delivers a horizontal spray range of approximately 47.6 feet. A multi-function control handle, adjustable support harness, and STIHL anti-vibration system help make the unit practical for demanding agricultural, horticultural, landscaping, and property-maintenance applications.

STIHL SR 450 Specifications

*Verify current dealer specifications for container, airflow, and fuel-capacity measurements before publication if your current STIHL catalog lists different values or measurement points.

Professional STIHL Backpack Sprayer & Duster

The STIHL SR 450 is designed for professionals who need the flexibility to handle more than one type of application with the same machine.

Rather than requiring separate equipment for liquid and granular materials, the SR 450 can be converted between spraying and dusting applications without special tools.

This makes it useful for applications where operators need to switch materials or treatment methods during the workday.

Liquid & Granular Applications

The defining feature of the SR 450 is its ability to distribute both:

• Liquid compounds
• Granular or dust-type compounds

The built-in conversion system allows the operator to change application modes without adding separate equipment.

Up to 47.6-Foot Horizontal Spray Range

The STIHL SR 450 has a maximum horizontal spraying distance of approximately 47.6 feet.

The extended range helps operators cover larger treatment areas while carrying the sprayer on their back.

63.3 cc Gas Engine

The SR 450 is powered by a 63.3 cc gas engine producing approximately 3.9 bhp.

STIHL describes the engine as fuel efficient with reduced exhaust emissions compared with previous designs, while providing the performance required for professional spraying and dusting applications.

Adjustable Support Harness

The adjustable support harness is designed to distribute the machine's weight across the shoulders and back.

This is particularly important on a backpack sprayer, where the operator may be carrying both the machine and application material for extended periods.

STIHL Anti-Vibration System

The STIHL anti-vibration system helps reduce the amount of engine vibration transferred to the operator.

Reducing vibration can improve comfort during longer spraying and dusting jobs.

Multi-Function Control Handle

The multi-function control handle places important operating controls within convenient reach of the operator's hand.

This allows application and engine functions to be managed without repeatedly removing a hand from the control handle.

Control Product Feed & Airflow

The SR 450 is designed to give the operator control over product feed and air speed, helping the machine adapt to different application requirements.

Always follow the chemical or product manufacturer's application instructions and all applicable safety requirements when using spraying or dusting equipment.

STIHL SR 450 Backpack Sprayer Uses

The SR 450 is designed for professional and demanding property applications where powered distribution of liquid or granular material is required.

Potential applications can include work in:

• Agriculture
• Horticulture
• Landscaping
• Grounds maintenance
• Large properties
• Orchards and similar managed growing areas
• Professional plant and property care

Always use the machine only with materials and applications permitted by STIHL and the product being applied.

STIHL SR450 Price & Availability

If you're comparing the STIHL SR 450 price or looking for a STIHL SR 450 for sale, use the current price and inventory displayed directly on this product page.

Pricing and availability can change, so the live product-page information should be treated as current at the time of purchase.

STIHL SR 450 vs. Standard Backpack Sprayers

One of the key differences between the SR 450 and a basic backpack sprayer is its ability to handle both liquid spraying and granular dusting applications.

Its gas engine also provides powered airflow and an extended spray range for professional applications.

Is the STIHL SR 450 a Mistblower?

Customers may search for equipment like the SR 450 using terms such as STIHL mistblower or mist blower. STIHL identifies the SR 450 as a backpack sprayer/duster capable of liquid and granular applications.

Pressure Pump Kit Recommendation

For applications where the spray tube is held at an upward angle greater than approximately 30 degrees, STIHL recommends a pressure pump kit to help maintain a consistent discharge rate.

STIHL SR 450 Instruction Manual

For complete setup, application, operating, maintenance, and safety information, refer to the official instruction manual:

STIHL SR 430 / SR 450 Instruction Manual

View STIHL Warranty and Shipping Policy

Frequently Asked Questions

What is the STIHL SR 450?

The STIHL SR 450 is a professional gas-powered backpack sprayer and duster capable of distributing both liquid and granular materials.

Can the STIHL SR 450 spray liquid?

Yes. The SR 450 is designed for liquid spraying applications as well as granular or dusting applications.

Can the STIHL SR 450 spread granular material?

Yes. The SR 450 includes a quick conversion system that allows it to switch from spraying liquid to applying appropriate granular or dust-type material.

Do you need tools to convert the SR 450 from spraying to dusting?

No. STIHL describes the SR 450 as converting between liquid and granular applications without special tools or additional equipment.

How far can the STIHL SR 450 spray?

Current STIHL technical information lists a maximum horizontal spraying distance of approximately 47.6 feet.

What size engine does the STIHL SR 450 have?

The SR 450 uses a 63.3 cc gas engine producing approximately 3.9 bhp.

How much does the STIHL SR 450 weigh?

The unit weighs approximately 28.2 lb. without application material.

What is the STIHL SR 450 tank capacity?

Your existing product specifications list a 3.7-gallon solution container. Confirm the current dealer specification before publishing if your latest STIHL technical sheet identifies the capacity differently.

Is the SR 450 a backpack sprayer?

Yes. It uses an adjustable backpack support harness designed to distribute the machine's weight across the shoulders and back.

Is the STIHL SR 450 a sprayer and duster?

Yes. The SR 450 is specifically designed to handle both spraying and dusting applications.

How much is a STIHL SR 450?

Check the current price shown on this product page. Pricing and availability may change over time.

Where can I find the STIHL SR 450 manual?

The official STIHL SR 430 / SR 450 instruction manual is linked above for operating, maintenance, and safety information.

STIHL SR 450 Backpack Sprayer & Duster

Choose the STIHL SR 450 when you need a professional backpack application tool capable of handling both liquid and granular materials. Its 63.3 cc engine, approximately 47.6-foot horizontal spray range, quick 2-in-1 conversion system, anti-vibration system, adjustable harness, and convenient controls make it a versatile choice for demanding spraying and dusting work.