SR 450
A powerful backpack sprayer/duster that easily converts from liquid to granular applications.
The STIHL SR 450 is a professional-grade sprayer that covers all the bases. Its low-emission, fuel-efficient engine delivers a 20% greater spray range when compared to previous models. Ideal for distributing liquid or solid compounds, this backpack sprayer/duster converts from misting to dusting applications without any special tools or additional equipment. It’s easy to use and provides excellent control over product feed and air speed. And to top it all off, the sprayer also quickly converts to a powerful leaf blower for fast debris cleanup.
| SR 450 Specifications | |
| DISPLACEMENT | 63.3 cc (3.86 cu. in.) |
| ENGINE POWER | 2.9 kW (3.9 bhp) |
| WEIGHT | 12.8 kg (28.2 lbs.) |
| FUEL CAPACITY | 1700 cc (57.5 oz.) |
| CONTAINER CAPACITY | 14.0 l (3.7 gals.) |
| AIR VOLUME | With Tubes: 920 m3/h (542 cfm) |
| AIR VELOCITY | 90 m/sec. (201 mph) |
| SPRAY RANGE (Maximum) | Vert.: 13.0 m (43 ft.) Horz.: 14.5 (48 ft.) |
| The pressure pump kit is recommended for applications in which the spray tube is held at an upward angle of more than 30 degrees in order to maintain a consistent discharge rate. | |
Important Information
Note: STIHL recommends use of fuel with no more than 10% Ethanol content. Using fuel with greater than 10% Ethanol content may cause damage to your equipment and may void your STIHL warranty. Learn More…
WARNING! Improper use of any power tool may cause serious
or fatal injury. Read, understand and follow carefully the operating
and safety instructions in your instruction manual before using such products.
STIHL products sold through U.S. STIHL dealers are for distribution in the United States only.
Model Features
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Anti-Vibration System
STIHL has a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience. -
Multi-Function Control Handle
Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operator’s hand never has to leave the handle. -
Adjustable Support Harness
STIHL backpack blowers and sprayers are equipped with an adjustable support harness that distributes weight evenly across the shoulders and back, reducing user fatigue.
You Will Also Need
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HP Ultra 2-Cycle Engine Oil
No matter how you slice it (or trim it or shred it), there’s no better protection for your high performance 2-stroke engine than STIHL HP Ultra. This 2-cycle engine oil has outstanding engine cleaning characteristics, plus “ultra” lubricating qualities that’s superior to other 2-cycle engine oils. This fully synthetic oil is also highly biodegradable, degrading by 80% in 21 days. We’re so confident this oil will protect your engine, we’ll double your STIHL limited warranty* when you use it. It’s that good.
*Double your warranty when you include 6 bottles of STIHL HP Ultra Oil or 6 cans of STIHL MotoMix® Premixed Fuel with your STIHL product purchase. Double limited warranty protection applies to STIHL gasoline-powered products purchased and registered for personal non-income producing, family and household purposes only. Other restrictions apply. See dealer for details.
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No-Spill® Fuel Containers
No-Spill® fuel containers advance convenience and quality in gasoline-can design by reducing emissions of hydrocarbons from evaporation, permeation and spillage. This helps protect the environment as well as saves you on fuel costs due to waste. Each container is molded from fluorinated, high molecular weight material for low permeation. The thumb-button flow control allows filling even smaller-sized tanks reducing the risk of spilling and is designed to stop the flow automatically when the tank becomes full to prevent overflowing. Built on a wide and stable base for less likelihood of upsets and equipped with child-resistant closures, all No-Spill® containers comply with both EPA and CARB requirements. With 1¼-gallon, 2 ½-gallon and 5-gallon sizes available, you’re sure to find one that fits your needs.
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For Your Safety
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ProPack 4-Pack Glasses
The STIHL ProPack 4-Pack includes a combination of glasses with smoke and clear lenses. Both shade colors filter out 99% of harmful UV rays and each lens is made from optical-grade polycarbonate for impact-resistance. A sleek, unisex design offers protection with a single lightweight wrap-around lens. Make this pack the new go-to for your work crew.
Meets ANSI Z87+ Standard
Included colors: Clear, Smoke
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Work Gloves
These STIHL Work Gloves are ready to go to work for you. Made of premium goat skin leather at the palms and fingertips, they provide durability and softness for a comfortable fit. The high-visibility orange back of the gloves feature breathable knit material for improved airflow. And the knit wrist is elongated for a secure fit under a sleeve, keeping out dirt and other debris.
Materials: Goat skin leather with knit backing
Available sizes: One size fits most
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HP 29 Hearing Protector
Heavy machinery doesn’t have anything interesting to say – block out that noise with our most noise-reducing hearing protection. These top-quality Hearing Protectors feature padded stainless steel spring-wire headbands maintain constant pressure. So no sliding around and letting in unwanted sound waves. They’re also easy to adjust. Set a comfortable fit and get to work in peace.
Meets ANSI S3.19-1974 standard. Noise Reduction Rating (NRR) of 29 dB(A).
Available color: Orange
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Reflective Safety Vest
The Reflective Safety Vest from STIHL meets the standard for use along highways and other high-traffic areas. It features a longer tail in back for maximum reflective exposure – great for workers using backpack blowers. Two front pockets and one chest pocket provide great utility for carrying job necessities.
Meets ANSI/ISEA 107-2004 standard
Available color: High-Visibility Yellow
Available sizes: M, L, XL, XXL
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Product Safety Manual (PDF)
STIHL Limited Warranty
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