WE ARE PROUD TO BE INDEPENDENT AND IN NO WAY ASSOCIATED WITH MANUFACTURERS. TO STAY UNBIASED, WE DO NOT ACCEPT FREE PRODUCTS. WE EARN FROM ADVERTISING FEES PAID BY RETAILERS ON QUALIFYING PURCHASES.

Stihl RB 400 Spec Review

The Stihl DIRT BOSS® RB 400 is a gas-powered pressure washer offering a maximum water pressure of 2700 PSI and flow of 2.7 GPM. (Read full specs)

CompareShortlistShortlistedRemoved from shortlist 10
Stihl RB 400 2700PSI Gas Pressure WasherStihl RB 400 2700PSI Gas Pressure WasherStihl RB 400 2700PSI Gas Pressure WasherStihl RB 400 2700PSI Gas Pressure Washer
According to Stihl's Internet Sales Policy (opens in a new tab) and to the 10 reasons mentioned on this page (opens in a new tab), it is not possible to ship a NEW Stihl product in the USA. The only way to get the Stihl RB 400 shipped to your place is to get it second hand or refurbished on eBay. Online stores such as Acme Tools, Ace Hardware, and Northern Tool (links below) may allow online purchase and in-store pickup of Stihl products.

Description

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. (source: Stihl (opens in a new tab))

Zoom on the Stihl RB 400

The Stihl RB 400 is a medium duty pressure washer, that provides its users with an all-around versatile cleaning experience, and enables:

  • spot cleaning of hard, unpainted surfaces or high reach areas
  • intense cleaning of tough, paintless surfaces
  • cleaning of painted and fragile surfaces
  • application of detergent and cleaning solutions

Its power characteristics and design, its main features and all its additional features are presented ahead.

Power

The Stihl RB 400 in use

The Stihl RB 400

Powered by a 196 cc (6.5 hp) engine, its axial pump can deliver a pressure of 2700 PSI (around 45 times more than a standard garden hose) and a flow of up to 2.7 GPM (values claimed by the manufacturer). Combined, these values mean that the Stihl RB 400 has a cleaning power of 7290 Cleaning Units.

This gas-powered pressure washer’s Kohler SH265 engine is started by a traditional pull-start mechanism.

The fuel is stored in a tank, which can hold up to 0.95 gallon of gasoline.

Design & Handling

The Stihl RB 400 is very mobile, due to its hand truck design and approximate dimensions of D28.5 x W27.5 x H39.5 in. The robust steel tubing frame guarantees longevity of the assembly. The folding handle enhances its mobility, while allowing for a convenient storage.

This model weighs 90 lbs. For this reason, it cannot be called lightweight and thus, carrying and transporting it might be somewhat challenging. Its 196 cc Kohler SH265 engine and steel tubing frame add up to a large chunk of the device's weight. However, the unit is manipulated smoothly thanks to its two pneumatic wheels, which play a key role in its maneuvrability.

Main Features

The Stihl RB 400 in use

The Stihl RB 400

The Stihl RB 400 comes with a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are detailed below.

  • Soap injection: Detergent is fed in through a siphon hose, since the device lacks a soap tank. However, since the Stihl RB 400 does not feature a soap dilution mechanism, you'll have to make sure your detergent is correctly diluted before use. If a soap nozzle is attached, the device will proceed to add the detergent to the water automatically.
  • Pressure hose: The included 25 ft high-pressure hose can be neatly stored on the unit when idle thanks to a set of convenient hooks.
  • Spray gun and wand: The included classic ergonomic spray gun and its wand can be easily stored in a side hook.
  • Nozzles: The 5 nozzles included with the device, and the respective surfaces which they’re the most suitable for, are shown in the following table.
 


15°

25°

40°

Soap
Concrete, brick, masonryUse with cautionSuitableSuitableSuitableSuitable
Siding, gutters, houseNot recommendedUse with cautionUse with cautionSuitableSuitable
Fencing, deck, patioNot recommendedUse with cautionUse with cautionSuitableSuitable
Lawn equipment, boat, RVNot recommendedUse with cautionUse with cautionUse with cautionSuitable

Note: The shape of the nozzles above is for illustration purposes only and may differ.
Red cross: Not recommended. Green check: Suitable. Orange check: Use with caution.

Other Features

The specs of the Stihl RB 400

The Stihl RB 400

  • Onboard storage: With the Stihl RB 400's handy storage area, you’ll always have all the necessary nozzles and accessories at hand and thus, you’ll be fully prepared for any job.
  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation), a low oil protection and a thermal relief valve (which helps to prevent internal pump damage).
  • Accessories: Included with the Stihl RB 400 are also the owner's manual (opens in a new tab) and some basic documentation to get you promptly started, along with several accessories, such as wand, pressure hose, spray gun, oil and soap hose.

Product Videos

The Stihl RB 400's performance versus other pressure washers

The following charts are provided to give you an idea of how the key specs of the Stihl RB 400 compare to similarly priced pressure washers.

  • The Stihl RB 400 and its 2700 PSI, ranks amongst gas-powered pressure washers with a comparably low pressure output, considering the units that cost between $600 and $700. As for the device with the most powerful water stream, in this price range, one of the top products is the Lifan LFQ4515E-Elite with 4500 PSI.
  • In its respective price range, the water flow of this washer, 2.7 GPM (gallons per minute), ranks as average. In case you are looking for a device which can most efficiently rinse away debris in the current price range, the Lifan LFQ4515E-Elite has the highest GPM of 4.
  • The RB 400 has 7290 Cleaning Units (PSI x GPM), which can be considered low in comparison to other gas-powered devices of this price. When it comes to the highest overall cleaning power in the current price range, one of the products at the very top currently is the Lifan LFQ4515E-Elite and its 18000 Cleaning Units.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from this interactive chart, when compared to other gas-powered washers between 7000 and 7500 Cleaning Units, the Stihl RB 400 is on the expensive side of the price range.

While certainly not the cheapest of its cleaning power range, purchasing it could most likely also mean enjoying the reliability of a high-end product.

The bottom line

STRENGTHS:
  • Good range of nozzles included
  • Onboard storage
  • Several security features
AVERAGE SPECS:
  • Decent GPM for the price
WEAKNESSES:
  • On the expensive side
  • No soap tank
  • No detergent dilution mechanism
  • Low PSI for the price
  • Low CU for the price

Do you own the Stihl RB 400 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
FuelGas-Powered
HandlingHand Truck
WaterCold (125°F max.)
PSI2700
GPM2.7
Cleaning Units7290
Engine196 cc 6.5 HP Kohler SH265 4-stroke OHV
PumpAxial
Features
FrameSteel tubing
Soap injectionVia siphon hose
Soap dilutionNo
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose25 ft
Hose storageHooks
Misc
Dimensions
(D x W x H)
Approx. 28.5 x 27.5 x 39.5 in
Weight90 lbs
Wheels2 wheels, pneumatic
Included accessoriesOil, wand, spray gun, high pressure hose, soap hose, 5 nozzles
SecurityLow oil, trigger lock and thermal relief valve
EmissionsUnknown
Warranty2 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

×

This form does not send us any personal data (not even your IP address)

About Stihl

Since revolutionizing the forestry industry in 1926 with the invention of the first two-person electric chainsaw, STIHL has become one of the top-selling brands of outdoor power equipment in the US and around the world. Their ever-growing product line includes gas-powered, corded-electric and battery products. Made in the USA and in China by over 2,000 dedicated employees at their state-of-the-art, dedicated, manufacturing facilities in Virginia Beach, VA, and in Qingdao, STIHL products are sold by local, authorized dealers in over 80 countries.

Warranty Information

The Stihl RB 400 is covered under a warranty for up to 2 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Stihl pressure washers, please consult Stihl's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-467-8445.

Stihl RB 400
7 Total Score
1 review
Add your review
Ease Of Use
5
Value
3
Quality
10
Performance
10
1 Review
  1. 3.5
    Ease Of Use
    50
    Value
    30
    Quality
    100
    Performance
    100

    Very poorly designed, You can not just pull back on the handle to move the unit you must place you foot on the frame to get it to tilt back. Very difficult to get the pressure hose off the pump as well as the wand. 25 feet of hose is not very good it is too short, requiring a lot of moving when washing the house. Kohler is a good engine but you can not shot off the gas supply to run the carburetor dry, considering the relatively high price for its capacity you would hope it would be more user friendly.

    + PROS: plenty of pressure
    - CONS: not user friendly over priced
    Helpful(0) Unhelpful(0)You have already voted this

Leave a review

Your total score

Pressure Washer Database
Logo
Compare items
  • Total (0)
Compare

You can compare as many pressure washers as you wish. However, for the best results, we recommend you to compare only 2 products at a time.

0