Heavy-Duty Cleaning Power Built for Demanding Jobs

The STIHL RB 400 DIRT BOSS® Gasoline Pressure Washer is designed for users who need commercial-grade cleaning performance with the durability and reliability expected from STIHL. Whether you’re cleaning driveways, sidewalks, patios, decks, farm equipment, construction machinery, vehicles, fences, or commercial buildings, the RB 400 DIRT BOSS® delivers the power to remove years of built-up dirt and debris with ease.

Powered by a dependable 196cc gasoline engine, this professional-grade pressure washer generates 2,700 PSI of cleaning pressure and 2.7 gallons per minute (GPM) of water flow, making it ideal for heavy-duty residential, agricultural, commercial, and landscaping applications.

Engineered with durability in mind, the RB 400 features a premium brass manifold pump, ceramic-coated pistons, stainless steel valves, and a cast-iron cylinder liner, ensuring exceptional longevity even under frequent use. STIHL’s Easy Start Pump System relieves pump pressure during startup, allowing effortless engine starts without difficult recoil pulls.

Comfort and convenience are equally important. The built-in four-point vibration isolation system reduces pump vibration for smoother operation and increased component life, while the integrated fuel shut-off system combines the engine switch and fuel valve into one simple control for quick shutdown and mess-free transport.

With its 25-foot kink-resistant high-pressure hose, durable spray lance, multiple quick-connect nozzles, detergent injection system, and compatibility with a wide range of STIHL cleaning accessories, the RB 400 DIRT BOSS® is ready to handle virtually any outdoor cleaning challenge.

When dependable power, long-lasting durability, and professional cleaning performance matter most, the STIHL RB 400 DIRT BOSS® stands out as one of the industry’s most trusted gasoline pressure washers.

Key Features & Benefits

Powerful 196cc Gasoline Engine

• High-performance engine delivers dependable power
• Produces 2,700 PSI cleaning pressure
• 2.7 GPM water flow for faster cleaning
• Ideal for demanding residential and commercial applications

Commercial-Grade Pump Construction

• Heavy-duty brass manifold pump
• Ceramic-coated pistons for extended service life
• Stainless steel valves resist corrosion
• Built for years of reliable performance

Easy Start Pump System

• Pressure relief valve reduces starting effort
• Eliminates difficult pull starts
• Faster and smoother engine startup
• Reduces wear on starter components

Four-Point Anti-Vibration System

• Minimizes pump vibration during operation
• Improves operator comfort
• Helps extend equipment lifespan
• Stable performance on demanding jobs

Integrated Detergent Injection System

• Easily applies cleaning detergents
• Perfect for vehicles, siding, patios, and equipment
• Improves cleaning efficiency
• Quick transition between soap and rinse modes

Premium Spray Nozzles

• Corrosion-resistant stainless steel pressure nozzles
• Dedicated brass detergent nozzle
• Quick-connect design
• Optimized spray patterns for multiple applications

Ergonomic Design

• Comfortable extended spray wand
• Easy-to-access hose connections
• Compact, balanced construction
• Simple transport and storage

Built for Long-Term Durability

• Cast-iron engine liner
• Heavy-duty frame construction
• High-quality internal components
• Designed for regular professional use

Ideal Applications

The STIHL RB 400 DIRT BOSS® is ideal for:

• Driveways and sidewalks
• Patios and decks
• Brick and stone surfaces
• Fences and retaining walls
• Farm and agricultural equipment
• Construction machinery
• Lawn care equipment
• Trucks, trailers, and SUVs
• Garage floors
• Commercial property maintenance
• Landscaping equipment
• Outdoor furniture
• Building exteriors
• Heavy-duty residential cleaning

Technical Specifications

Why Choose the STIHL RB 400 DIRT BOSS®?

✔ Powerful 196cc commercial-grade gasoline engine

✔ Delivers 2,700 PSI and 2.7 GPM cleaning performance

✔ Heavy-duty brass manifold pump for maximum durability

✔ Ceramic-coated pistons and stainless steel valves

✔ Easy Start Pump System for effortless starting

✔ Four-point vibration isolation improves comfort

✔ Integrated detergent injection system

✔ Premium stainless steel spray nozzles included

✔ 25-foot kink-resistant pressure hose

✔ Built for demanding residential and commercial cleaning

✔ STIHL reliability and professional-grade construction