The STIHL® RB 400 DIRT BOSS® pressure washer is built for homeowners who need serious cleaning power and long‑term durability. Designed to handle frequent, demanding outdoor cleaning tasks, this gas pressure washer delivers strong water pressure and consistent flow for removing stubborn dirt from driveways, decks, siding, fencing, and equipment. With rugged components and user‑friendly features, the RB 400 bridges the gap between residential and professional‑grade performance.

Key Features

Gas‑powered 196cc engine delivers up to 2700 PSI for heavy‑duty cleaning
2.7 GPM water flow provides faster, more efficient surface coverage
Easy Start pump system reduces starting effort and pull resistance
Brass manifold pump with ceramic‑coated pistons for enhanced durability
Low‑oil shutdown helps protect the engine during operation
25ft no‑kink high‑pressure hose allows extended reach without moving the unit
Two‑piece lance and spray gun assembly improves control and accuracy
Detergent injector system supports deeper cleaning on tough surfaces
Anti‑vibration system reduces operator fatigue during extended use
Model number 4790‑012‑4600‑US identifies the RB 400 DIRT BOSS® configuration

Why It’s a Smart Pick

The STIHL® RB 400 DIRT BOSS® stands out as a powerful step‑up option for users who want more durability and cleaning strength than entry‑level pressure washers. Its robust pump construction, higher PSI and GPM output, and protective engine features make it a reliable choice for frequent residential use where performance and longevity matter.

Width	Weight	Height	Length
0 Inch	90 Pounds	0 Inch	0 Inch

STIHL® RB 400 – DIRT BOSS® Pressure Washer | 2700 PSI Gas Engine