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Description
STIHL SG 51 3.2-Gallon Manual Backpack Sprayer
The STIHL SG 51 Manual Backpack Sprayer is a lightweight, versatile backpack sprayer designed for homeowners, gardeners, landscapers, and professional users. With a 12-liter (3.2-gallon) container, the SG 51 provides a practical balance of capacity, portability, and spraying control for treating lawns, gardens, landscaping areas, and other outdoor spaces.
STIHL Part Number: 4255 019 4951
Features That Make a Difference
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Genuine STIHL SG 51 manual backpack sprayer
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Part Number: 4255 019 4951
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Container Capacity: 12 L / 3.2 gal
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Designed for domestic users and professionals
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Suitable for fields and wide-open spaces
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Lightweight design helps reduce user fatigue
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Interchangeable pump lever for right- or left-handed operation
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Internal pump helps protect the pump mechanism from external damage
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Separate pressure reservoir means the entire tank does not need to be pressurized
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Adjustable support harness helps distribute weight across the shoulders and back
Specifications
| Specification | Details |
|---|---|
| Brand | STIHL |
| Model | SG 51 |
| Part Number | 4255 019 4951 |
| Product Type | Manual Backpack Sprayer |
| Container Capacity | 12 L / 3.2 gal |
| Max. Tool Length | 20.1 in |
| Hose Length | 59.1 in |
| Device Width | 15.7 in |
| Device Height | 19.6 in |
| Power Source | Manual |
The dimensions and capacity above correspond to STIHL's published SG 51 specifications.
Lightweight Backpack Design
At approximately 9.9 lb, the SG 51 is designed to provide a practical combination of capacity and portability. The backpack-style harness distributes the weight across the shoulders and back, helping improve comfort during extended spraying jobs.
The interchangeable pump lever can be installed on either side of the sprayer, making the SG 51 convenient for both right-handed and left-handed users.
Internal Pump & Pressure Reservoir
The SG 51 features an internal pump, which helps protect the pump mechanism from external damage. Its separate pressure reservoir means that only a portion of the liquid needs to be pumped and pressurized rather than the entire tank.
This design helps make the SG 51 a practical choice for regular spraying applications where portability and ease of use are important.
Ideal Applications
The SG 51 can be used for appropriate liquid spraying applications such as:
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Lawn and garden care
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Landscaping
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Plant treatment
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Fertilizer application
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Pest-control applications
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Insecticide application
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Pesticide application
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Herbicide application
STIHL describes the SG 51 as suitable for professionals, homeowners, and gardeners who need to spray products such as insecticides, pesticides, and fertilizers.
Always verify that the chemical or treatment product is approved for use with the sprayer and follow the product label instructions.
Compatible Nozzle Accessories
STIHL offers a nozzle set that is compatible with the SG 51, including fan-jet and hollow-cone nozzles for different spraying applications. A nozzle holder is required for mounting the nozzle set on the SG 51.
Safety & Proper Use
Before using the SG 51:
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Read and understand the STIHL operating instructions.
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Inspect the tank, hose, pump, wand, and connections for damage or leaks.
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Use only compatible spraying products.
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Wear the appropriate protective clothing and equipment specified by the chemical manufacturer.
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Follow all chemical product label instructions.
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Do not spray in windy conditions when doing so could cause unwanted chemical drift.
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Never use flammable, caustic, corrosive, or otherwise incompatible substances in the sprayer.
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Clean and store the sprayer according to the manufacturer's instructions.
STIHL's instruction manual specifically warns against using flammable or corrosive substances and emphasizes following chemical manufacturers' handling instructions.
Important Product Information
Product: STIHL SG 51 Manual Backpack Sprayer
Part Number: 4255 019 4951
Capacity: 3.2 Gallons / 12 Liters
Max. Tool Length: 20.1"
Hose Length: 59.1"
Width: 15.7"
Height: 19.6"
The SG 51 is a manual backpack sprayer, not a gasoline-powered sprayer. Its backpack design and 3.2-gallon capacity make it suitable for larger spraying jobs than handheld sprayers while remaining relatively lightweight.
Why Buy from Barry’s Power Equipment?
Barry’s Power Equipment provides quality STIHL outdoor power equipment and replacement parts.
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Genuine STIHL products
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Professional-quality equipment
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Competitive Pricing
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Fast Shipping
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Expert Customer Support
The STIHL SG 51 offers a lightweight, versatile solution for users who need a dependable 3.2-gallon manual backpack sprayer for lawn care, landscaping, gardening, and other outdoor spraying applications.
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