SR 450 - $699.95 DSRP


Distributor Suggested Retail Price
SR 450

DSRP: $699.95

Quantity:

Reserve with STIHL Express for In-Store Pick Up

A powerful backpack sprayer/duster that easily converts from liquid to granular applications.

For both the distribution of liquid or solid insecticides, fertilizers, or herbicides, the low-emission, fuel-efficient STIHL SR 450 Backpack Sprayer has a larger, more powerful engine that provides a spray range 20% wider than previous models, taking 20% less time to spray the same area, depending on application. The SR 450 easily converts from misting to dusting applications without special tool...Read More
Print Spec Sheets
SR 450 Specifications
WEIGHT WITHOUT LIQUID 12.8 kg (28.2 lbs.)
DISPLACEMENT 63.3 cc (3.86 cu. in.)
ENGINE POWER 2.9 kW (3.9 bhp)
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)
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.
Model Features
  • Zoom
    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.
  • Zoom
    Anti-Vibration System
    The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.
  • Zoom
    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.

    See it in action!

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.
Click to view the STIHL Limited Warranty Time Periods
We Also Suggest
  • Reflective Safety Pants Zoom
    Reflective Safety Pants
    When it comes to safety, visibility is key. STIHL Reflective Safety Pants provide excellent reflective exposure while working when visibility is poor. Available in two sizes – M/L and XL/XXL – these pants are designed with bright, contrasting colors for maximum visibility. Mesh legs and an elastic adjustable waistband provide additional comfort and zipper sides allow for simple removal. STIHL Reflective Safety Pants meet ANSI/ISEA 107-2010 Standard for Class E requirements and earn a Class 3 reflective rating when worn with the Class 2 reflective vest.
  • HP Ultra 2-Cycle Engine Oil Zoom
    HP Ultra 2-Cycle Engine Oil
    HP Ultra is a fully synthetic 2-cycle engine oil specially suited for high performance chainsaws and power tools. This oil has outstanding engine cleaning characteristics, plus “ultra” superior lubricating qualities in comparison to other 2-cycle engine oils. It is ideal for use in STIHL 4-MIX® engines. This oil is biodegradable, degrading by 80% in 21 days.

    •2.6 oz. bottle makes 1 gallon mix

    •5.2 oz. bottle makes 2 gallon mix

    •6.4 oz. bottle makes 2 1/2 gallon mix

    •12.8 oz. bottle makes 5 gallon mix

    STIHL recommends a mix of 50:1 high-quality 89 octane or higher unleaded gasoline to STIHL engine oil. This same mix ratio should be used during break-in.

  • No-Spill® Fuel Containers Zoom
    No-Spill® Fuel Containers
    The latest advance in gasoline can technology is here with No-Spill® fuel containers. Featuring a special treated body for low permeation, thumb-button flow controls for easier pouring, and a wide and stable base design to reduce upsets, No-Spill® fuel containers help ensure that the gasoline goes into your tank, not on the ground or into the air. Fill even smaller-sized tanks without spilling – flow stops automatically when the tank becomes full. With 1¼-gallon, 2 ½-gallon and 5-gallon sizes available, you’re sure to find one that fits your needs. Ask your local STIHL Dealer about No-Spill® fuel containers. Don’t settle for anything less.

    Meets California Air Resources Board Phase II requirements for sale or use in California. No-Spill® gasoline cans are tested and certified to ASTM F-852-99 standard specification for portable gasoline containers for consumer use and our diesel and kerosene cans are tested and certified to ASTM F-976-02 standard specification for portable kerosene and diesel containers for consumer use.

For Your Safety
  • Sleek Line Glasses Zoom
    Sleek Line Glasses
    A lightweight frame made of nylon offers the ideal combination of durability and comfort. Rubber temple tips and nosepiece offer a pressure-free fit behind the ears and protection from slippage on the nose bridge area. Protective lenses filter 99% of harmful UV rays.
  • Work Gloves Zoom
    Work Gloves
    Double palm layer and finger tips provide long life. Breathable polyester back and knit wrist provide snug fit. One size fits most.
  • STIHL® Pro Mark™  Hearing Protector Zoom
    STIHL® Pro Mark™ Hearing Protector
    Padded stainless steel spring wire headband maintains constant pressure. Easy to adjust. Noise Reduction Rating (NRR): 29. Meets ANSI S3.19-1974 standard.

    Colors available: Camouflage, Orange and Grey
  • Reflective Safety Vest Zoom
    Reflective Safety Vest
    Class II reflective vest that is required for working along highways meets ANSI/ISEA 107-2004 standard. Longer tail in the back provides maximum reflective exposure for users running backpack blowers. Two front pockets and one chest pocket provide utility for carrying necessary items. Available sizes: Medium, Large, X Large, XX Large

Are You Ready for a STIHL?

SR 450 is rated 4.3 out of 5 by 24.
Rated 5 out of 5 by from Machine is a beast! I bought my Stihl back in the spring of 2014 when I opened my company and I can tell you now finishing up my 4th mosquito season and servicing over 90 customers a month that this machine is practically bullet proof. Throttled out on an acre of property with nothing but English ivy it works like a champ. Use Stihl 2 cycle oil as recommended and change the plug every season and you'll be very happy. The diffuser design on the end could use some reworking, but a small tent bungee strap rigging on its fine.
Date published: 2017-09-13
Rated 5 out of 5 by from Awesome unit I bought one for mosquito control for my small Landscape Company yes it is heavy. However it does the job it starts up every time I have used mine all summer now and I have never had any significant issues.
Date published: 2017-08-29
Rated 1 out of 5 by from Leaks. Wow. Stihl. Brand new. 5th backpack I've used from Stihl. All the others worked flawlessly. This one blows. Motor is very strong but the water continues to leak in spite of turning off the nozzle. There needs to be a shutoff inside the tank. This would help in two ways: 1 you wouldn't have to premix chemicals in a secondary container 2 it would never leak. You're better than this Stihl.
Date published: 2017-08-19
Rated 5 out of 5 by from EXCELLENT VALUE *Heavy as other have said*Tank needs gallon- quart graduations not liter for USA sales*Will pay for itself quickly
Date published: 2017-07-13
Rated 5 out of 5 by from Bought mine a couple months ago Haven't had any issues yet, it appears heavy at first, but you have the tank on your back, so it'll lighten as the product disperses.
Date published: 2017-07-07
Rated 4 out of 5 by from Great product - except overall weight can post repetitive use issues. Wish Stihl would utilize a backpackers shoulder harness and restraint system to properly strap the unit to ones body and eliminate unit migration anytime the operator leans to one side or another, and then having to deal with sloshing liquid transfer. A proper backpackers harness would improve this unit 10fold!
Date published: 2017-07-02
Rated 5 out of 5 by from Great Performing Sprayer I purchased this sprayer to apply pest control in my yard. The SR450 is powerful enough to get high into my privacy hedges and trees. It also works great to move leave when I just need a reliable, powerful backpack blower.
Date published: 2017-06-22
Rated 5 out of 5 by from Great product Love the product and works as expected. The diffusers on the end of the wand do not attach very securely. It would be nice if they had a better locking mechanism. The price is a bit high also, but it is a good product.
Date published: 2017-06-12
  • y_2017, m_10, d_15, h_20
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_24
  • loc_en_US, sid_sr450, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_stihl