A premium pressure washer that combines excellent performance with durable build quality for long-lasting value.
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.
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POWER SOURCE Gas
 
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WEIGHT 90
 
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WATER PRESSURE 2,700
 
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WATER FLOW 2.7
 
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.
 
 
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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.
 
 
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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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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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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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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.
 
 
 
 
Specifications
| 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 |