Description
STIHL SG 51 12L Manual Backpack Sprayer
The STIHL SG 51 backpack sprayer is a robust 12-litre manual sprayer for domestic users, gardeners, grounds-maintenance teams and professionals who need to treat larger areas efficiently. It is particularly well suited to fields, wide-open spaces, allotments, estates and larger gardens where a small handheld pressure sprayer would require frequent refilling.
The SG 51 is manually operated, so there is no battery to charge and no fuel to store. Its reversible pump lever can be configured for left- or right-handed use, while the protected internal pump and durable control valve make it a practical choice for regular plant-care and spraying work.
Browse the complete STIHL sprayer range at Masseys, or compare it with our wider selection of garden and pressure sprayers.
Key Features and Benefits
12-Litre Capacity for Larger Areas
The 12-litre tank provides considerably more working capacity than a small handheld sprayer. This makes the SG 51 a useful middle-ground option for customers who need to cover larger gardens, beds, planted areas or open ground without immediately moving to a battery-powered machine.
Left- or Right-Handed Pump Operation
The variable pump lever can be fitted on either side of the sprayer, allowing the SG 51 to be configured for left- or right-handed operation. The lever length can also be adjusted to help the user find a comfortable working position.
Protected Internal Pump
The pump is positioned inside the sprayer tank, where it is protected against accidental knocks and damage. This contributes to the SG 51’s robust design and makes it suitable for regular use in demanding outdoor environments.
Robust Shut-Off Valve
The durable shut-off valve has a large operating lever for comfortable control of the spray. This helps the operator start and stop application accurately without needing excessive hand pressure.
Central Hose Outlet
The hose connects centrally at the bottom of the tank. This arrangement provides greater freedom of movement and works equally well whether the pump lever is configured on the left or right side.
Integrated Measuring Cups
The tank lid incorporates three measuring cups with capacities of 10 ml, 20 ml and 50 ml. These provide a convenient way to measure suitable liquid products before mixing, subject to the instructions supplied with the product being applied.
Integrated Spray-Tube Holder
The spray tube can be secured in the integrated holder during work breaks, transport and storage. This helps protect the tube and keeps the complete sprayer easier to carry and store.
Adjustable Carrying System
The backpack straps can be adjusted to suit the user. The sprayer’s carrying arrangement distributes the tank across the back rather than requiring the full weight to be supported by one hand.
STIHL SG 51 Technical Specifications
| Product type | Manual backpack sprayer |
|---|---|
| Tank capacity | 12 litres |
| Hose length | 1,500 mm |
| Maximum tool length | 510 mm |
| Product width | 398 mm |
| Pump-lever position | Left- or right-hand configuration |
| STIHL part number | 42550194950 |
| Suitable users | Domestic, occasional and professional users |
What Can the STIHL SG 51 Be Used For?
The STIHL SG 51 is intended for plant-care and spraying tasks across larger gardens, fields and open spaces. Depending on the instructions and compatibility information supplied with the liquid product, it may be used for jobs such as:
- Plant and crop care
- Applying suitable liquid fertilisers
- Targeted weed-control work
- Treating planted beds and borders
- Maintenance of allotments and larger gardens
- Grounds, estate and landscaping work
Important: Always check the label of the product being applied and the STIHL operating instructions before filling the sprayer. Wear the recommended personal protective equipment and do not assume that every chemical or cleaning product is suitable for use in the SG 51.
Why Masseys Recommends the STIHL SG 51
At Masseys, we recommend the STIHL SG 51 to customers who have outgrown a small handheld sprayer but do not necessarily need the additional cost or charging requirements of a cordless model.
Its 12-litre capacity provides a useful balance between working range and portability. The reversible pump lever is a particularly practical feature because it makes the sprayer suitable for both left- and right-handed users, while the protected internal pump is less exposed to accidental damage during transport and everyday use.
The SG 51 is a strong choice for allotment holders, gardeners, estates and professional users who prefer straightforward manual equipment. However, a full 12-litre tank represents a substantial load. Customers working only in small gardens or treating occasional isolated areas may find the smaller SG 31 more convenient.
Choosing the Right STIHL Sprayer
Not certain whether the SG 51 is the right model? These alternatives may be more suitable:
- STIHL SG 31 5L Sprayer – a smaller option for lighter and more occasional spraying jobs.
- STIHL SG 71 18L Backpack Sprayer – a larger-capacity manual model intended for regular professional use.
- STIHL SGA 30 Cordless Sprayer Set – a compact battery-powered option that avoids repeated manual pumping.
- STIHL SGA 60 Cordless Backpack Sprayer – suitable for customers who want battery-powered pressure for larger spraying tasks.
You can also view the full STIHL machinery range at Masseys.
Buy the STIHL SG 51 from Masseys
Masseys is an authorised STIHL dealer based in Woodville, Swadlincote. Our team can help you compare manual and cordless STIHL sprayers and select the most appropriate model for the size and frequency of your work.
Order the STIHL SG 51 online or visit our Derbyshire store for local advice and collection options.
Frequently Asked Questions
Is the STIHL SG 51 battery powered?
No. The SG 51 is a manually operated backpack sprayer. Pressure is created using the side-mounted pump lever, so no battery, charger or fuel is required.
Can the STIHL SG 51 be used left-handed?
Yes. The pump lever can be configured on either side of the sprayer for left- or right-handed operation. Its length can also be adjusted.
How much liquid does the STIHL SG 51 hold?
The SG 51 has a 12-litre tank.
Is the STIHL SG 51 suitable for professional use?
Yes. STIHL describes the SG 51 as suitable for both occasional and professional users. Its robust construction and protected internal pump make it appropriate for regular work, provided it is used and maintained in accordance with the operating instructions.
What is the difference between the STIHL SG 51 and SG 71?
The SG 51 has a 12-litre capacity and is suitable for domestic and professional use. The SG 71 has a larger 18-litre tank and is more directly aimed at regular professional users who need additional capacity.
Can any weedkiller or chemical be used in the SG 51?
No universal compatibility should be assumed. Always check both the STIHL operating instructions and the label of the liquid product. Only use products that are specifically approved for application through a suitable garden or backpack sprayer.
Reviews
There are no reviews yet.