RB 400 Dirt Boss® - $579.95 DSRP


Distributor Suggested Retail Price
RB 400

DSRP: $579.95

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A premium pressure washer that combines excellent performance with durable build quality for long-lasting value.

The STIHL RB 400 Dirt Boss® pressure washer features a powerful 196 cc (6.5 hp) engine, delivering 2,700 psi of water pressure at 2.7 gallons per minute. It’s got the power you need for heavy-duty cleaning of sidewalks, driveways, decks and more. The RB 400 Dirt Boss® is also built to last, including a brass manifold pump design, stainless steel valves and ceramic-coated pistons. There is also a c...Read More
Print Spec Sheets
RB 400 Dirt Boss® Specifications
DISPLACEMENT 196 cc 12.0 cu. in.)
FUEL CAPACITY 3.6 L (3.8 qt.)
HOSE LENGTH 25'
WATER FLOW 620 L/h (2.7 gpm)
WATER PRESSURE 2,700 psi
CLEANING UNITS 7,290
WEIGHT 41 kg (90 lbs)
DIMENSIONS HANDLE DOWN 724 x 699 x 654 mm (28.5 x 27.5 x 25.75")
DIMENSIONS HANDLE UP 724 x 699 x 1003 mm (28.5 x 27.5 x 39.5")
Model Features

Important Information
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
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RB 400 Dirt Boss® is rated 4.6 out of 5 by 7.
Rated 5 out of 5 by from The power washer is easy to use, very sturdy and does a great job of cleaning surfaces The power washer is easy to use, very sturdy and does a great job of cleaning surfaces. Love the washer.
Date published: 2017-08-02
Rated 5 out of 5 by from Solid reliable machine Solid, well built machine that will get the job done. Starts on the first pull. Well worth the investment.
Date published: 2017-07-05
Rated 5 out of 5 by from Like a boss The times that I have used this it has been easy to start and worked like a Stihl should.
Date published: 2017-06-05
Rated 5 out of 5 by from Great Product Purchased the RB400 Dirt Boss earlier this week. So far I am very impressed with this machine. Watched the service technician check fluids, then fire it right up on the first pull. The Kohler engine runs very smoothly and it is much quieter in comparison to the engines on pressure washers I've used in the past. I like that the engine kill switch acts as a fuel cut off as well. This seems like a smart feature for a carb motor. STIHL thought this product out and it shows. The connections are simple, quick and do not over tighten with use (be sure to squeeze the wand trigger to release the pressure before you try and disconnect the wand after use). The hose doesn't kink and have a mind of it's own. The trigger on the wand pulls from the top side to reduce fatigue with extended use. The pressure is strong enough to tackle big jobs but smooth enough so that it doesn't wear you out with extended use also.Other features include light weight materials and ergonomic handles that allow one man to load the machine onto a standard full size pickup truck. These features also allow the machine to be maneuvered with very little effort in comparison to other pressure washer models. Longevity is tough to determine at this point, but if this machine is anything like the 7 other STIHL machines I've purchased, it will be cleaning my house, porch and driveway for a long time.
Date published: 2017-05-19
Rated 2 out of 5 by from Pump leaking on first use Well I decided to buy the new Stihl pressure washer because everything else I have from them is top-notch and last forever. Well I can't say this for the new RB - 400 and I knew coming in with it being brand new they would probably have some small Kinks to work out anyway I used it the first time for about 2 hours washing my driveway off I'm always very particular with all my equipment as I clean everything off before I put it up as I was cleaning it I noticed black Grease below the pump two decent-sized puddles. I'm not sure where it's coming from and worst of all it's just disappointing after spending so much money on a product and have it fail on you the first use. Hopefully I can get it fixed but it's not a good sign so far
Date published: 2017-04-23
Rated 5 out of 5 by from This thing is awesome pressure washed my siding and 30,000 gallon concrete pool no problem . Deffinitely recomend this product!!!
Date published: 2017-04-13
Rated 5 out of 5 by from Stout machine. Nice quality made product. Solidly built. No plastic. Unable to determine dependability as it is brand new, starts easy.
Date published: 2017-04-12
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