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.
Model Features
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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.
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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.
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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.
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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.
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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
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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.
Specifications
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.