RB 400 DIRT BOSS®
Powerful, high-performance, and easy to use. Designed with high-quality, durable components for tough cleaning jobs.
When you need a power washer that delivers top performance and can stand up to daily use, choose the STIHL RB 400 DIRT BOSS® pressure washer. It features a powerful 196 cc (6.5 hp) engine that can output 2,700 psi of water pressure at 2.7 gallons per minute. It also features the durability STIHL products are known for, with a brass manifold pump design, stainless steel valves and ceramic-coated pistons. There is also a cast-iron engine liner and a built-in shutdown feature when the oil level is low. The RB 400 DIRT BOSS® also features an easy start pump system and convenient detergent injector system. And with its 25' no-kink flex hose, you can clean more area without having to move the machine. Finally, the pressure washer uses a wide range of optional cleaning accessories, including rotary surface cleaner, water broom, nozzle options, hose extensions, a gutter cleaner, aluminum wand extension, pivot coupler and official STIHL cleaning agents. When you need to demolish dirt on a daily basis, the DIRT BOSS® handles the pressure with ease.
| RB 400 DIRT BOSS® Specifications - Mid-Range Use | |
| POWER SOURCE | Gas |
| WEIGHT | 90 lbs |
| WATER PRESSURE | 2,700 psi |
| WATER FLOW | 2.7 gpm |
| CLEANING UNITS | 7,290 |
| HOSE LENGTH | 25 ft. |
| ENGINE POWER | 6.5 bhp |
| FUEL CAPACITY | 115.2 oz. |
| DISPLACEMENT | 196.0 cc |
| Note: Weight displayed is dry weight. | |
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.
Model Features
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RB Easy Start Pump System
The Easy Start Pump System features a pressure relief valve, allowing users to start the unit without any back pressure from the pump. It enables quick, easy starting with no hard cord pulls. -
Stainless Steel High Pressure & Brass Detergent Nozzles
This pressure washer includes stainless steel nozzles for use with high-pressure water and a brass nozzle for use with detergent. These premium nozzles are designed to resist corrosion and wear. -
RB 2-Piece Lance & Gun Assembly
This pressure washer features an easy, convenient 2-piece lance and gun assembly. The lance design is also extended for better accuracy in tall applications. -
Easy-Access Inlet & Outlet Water Connections
Both inlet (water coming into the pump) and outlet (water going from the pump to the gun) connections are easy to access for faster setup -
Automatic Fuel Shut-Off Valve
This pressure washer features a combined on/off and fuel valve control. This allows the user to shut unit off and close fuel valve automatically for easy, no-mess transport. -
Anti-Vibration System
This pressure washer features a STIHL-engineered 4-point vibration isolation system. This reduces pump vibration during use for increased unit longevity.
We Also Suggest
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SPECIAL OFFER
Water Broom
Wash large surfaces like decks, sidewalks and driveways quickly with this attachment. For all RB models.
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SPECIAL OFFER
Rotary Surface Cleaner
Ideal for sidewalks and driveways, the Rotary Surface Cleaner is a pressure washer accessory that quickly and easily cleans large outdoor surfaces. With its 14” diameter, this accessory is a must-have to perform large cleaning jobs fast. It features an easy-to-attach quick coupler that makes it compatible with any STIHL RB pressure washer. Plus, its large rotating spray bar creates pressure that lets the Rotary Surface Cleaner effortlessly glide along the cleaning surface.
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SPECIAL OFFER
Rotating Nozzle 3000 psi
Compatible with the STIHL RB 200 and RB 400 pressure washers, this rotating zero-degree nozzle delivers aggressive cleaning of stubborn stains and gum removal with a 3000 psi maximum rated pressure. It delivers a wide-angle jet stream and features a ¼” quick-connect plug with filter. With the cleaning power of this accessory, you can expect to increase your cleaning output and cut down on your cleaning time.
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SPECIAL OFFER
STIHL Moto4™
STIHL Moto4™ utilizes an ethanol-free formula, allowing the fuel to stay fresh longer — up to two years after the container is opened — than alternative fuel options containing ethanol. With a minimum octane range of 93, this premium fuel is specifically formulated by STIHL for use in 4-stroke products, to consistently deliver excellent engine performance.
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For Your Safety
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SPECIAL OFFER
Basic Hearing Protector
When it has the STIHL name, it’s made to work as hard as you do. Our Hearing Protectors feature a padded stainless steel spring wire headband. They help maintain constant pressure, staying firmly in place while you work. They’re also easy to adjust, so you can set the ideal fit with minimal effort.
Meets ANSI S3.19-1974 standard. Noise Reduction Rating (NRR) of 23 dB(A).
Available color: Black/Grey
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SPECIAL OFFER
Reusable Ear Plugs
Top-quality hearing protection you can keep in your pocket. NRR 27 Reusable Ear Plugs from STIHL feature multiple layers of air cushioning for superior noise reduction and long-lasting comfort. Their tapered design provides a secure seal that keeps you protected almost anywhere – from the shooting range to the job site. And thanks to the included nylon cord and carrying case, you can keep your ear plugs handy for the long haul.
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SPECIAL OFFER
Meshback Gloves
With the Meshback Gloves, STIHL has your hands covered! Combining a variety of materials that maximize performance, these gloves give you the comfort and grip you need. An air mesh nylon covers the back for great breathability, while padded grain goat skin gives the palm a stylish and modern design. The gloves also feature a brow wipe to help wick away perspiration. Plus, the adjustable wrist-strap closure provides a secure fit and the glove’s neoprene knuckle padding and cuff are designed to protect against abrasion and provide flexibility.
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SPECIAL OFFER
Adjustable Goggles
STIHL Adjustable Goggles are designed to equip wearers with a level of protection that is exceedingly comfortable. The hard coat polycarbonate lenses provide an added degree of comfort, and protect against 99% of harmful UV rays. The interchangeable and adjustable temples and strap allow for a custom fit. The rubber nosepiece and rubber gasket on the brow increase comfort and help keep out debris. These goggles are perfect for a range of applications from pressure washing to trimming and pruning
Adjustable Goggles meet ANSI/ISEA Z87.1-2015 Droplet and Splash Hazard (D3) testing
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