Pressure Washers

RB 400 DIRT BOSS®

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.

  • DISPLACEMENT: 196 cc 12.0 cu. in.)
  • FUEL CAPACITY: 3.6 L (3.8 qt.)
  • HOSE LENGHT: 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")

Key product features:

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.

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.

OUR STORE LOCATIONS

Marlborough Store

135 Maple Street,
Marlborough, MA
Call (508) 318-4788


Mon-Fri 7:00am to 6:00pm
Sat 7:00am to 5:30pm
Sun 12:00pm to 4:00pm

Framingham Store

759 Waverly Street,
Framingham, MA
Call (508) 386-9876


Mon-Fri 7:00am to 6:00pm
Sat 8:00am to 5:30pm
Sun 10:00am to 4:00pm

Monnick Supply $$
135 Maple St.
Marlborough MA 01752
United States
(508) 318-4788
Mon-Fri 7am - 6pm
Sat 7am - 5:30pm
Sun 12pm - 4pm
Monnick Supply $$
759 Waverly St.
Framingham MA 01702
United States
(508) 386-9876
Mon-Fri 7am - 6pm
Sat 8am - 5:30pm
Sun 10am - 4pm