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Stihl RB 800 Spec Review

The Stihl RB 800 is a gas-powered pressure washer offering a maximum water pressure of 4200 PSI and flow of 4 GPM. (Read full specs)

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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 800 shipped to your place is to get it second hand or refurbished on eBay. Online stores such as Acme Tools and Northern Tool (links below) may allow online purchase and in-store pickup of Stihl products.

Description

This power washer is the most impressive one in the STIHL lineup. It is designed for heavy-duty commercial use and can get through tough cleaning jobs. With 4,200 psi of water pressure and 429 cc engine, the RB 800 cleans up the dirtiest jobs with ease. Its industrial design is made to withstand heavy daily use. (source: Stihl (opens in a new tab))

Zoom on the Stihl RB 800

In a nutshell, the Stihl RB 800 is a heavy duty, commercial pressure washer, which not only offers an all-around versatile cleaning experience, but that also allows:

  • spot cleaning of hard, paintless surfaces and reaching far-away areas
  • intense cleaning of tough, paintless surfaces
  • cleaning of painted and frail 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 800 in use

The Stihl RB 800

Its brass triplex pump, which utilizes a powerful 429 cc (14 hp) engine, may deliver a pressure of up to 4200 PSI (almost 70 times more than a standard garden hose) and a flow of up to 4 GPM. These values correspond to a cleaning power of 16800 Cleaning Units.

The Kohler CH440 engine of this gas-powered pressure washer gets started by a classic pull-start mechanism.

Gasoline is stored in a fuel tank with a maximum capacity of 1.8 gallon.

Design & Handling

The Stihl RB 800 is very mobile, due to its hand truck design and approximate dimensions of D33.5 x W31 x H45.8 in. The robust and sturdy steel tubing frame offers longevity to the assembly. The folding handle enhances its mobility, while allowing for a convenient storage.

At 168 lbs, we can't really say that the unit is a lightweight, and manually lifting or transporting it could be a challenge. Its 429 cc Kohler CH440 engine, the triplex pump and steel tubing frame add up to a large chunk of the device's weight. However, the device’s two 13" pneumatic wheels play a key role in its maneuvrability, as they allow it to be manipulated smoothly.

Main Features

The Stihl RB 800 in use

The Stihl RB 800

The Stihl RB 800 comes with a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are detailed below.

  • Soap injection: Even though the device doesn't have a soap tank, detergent is supplied by a siphon hose. The Stihl RB 800 is not equipped with a soap dilution mechanism, and thus, it is up to the user to ensure the detergent’s correct dilution ratio when using it. If a soap nozzle is attached, the device will proceed to add the detergent to the water automatically.
  • Pressure hose: The 50 ft ⌀3/8" high-pressure hose, which is included with the device, can be stored neatly on the unit itself when idle, using a set of convenient hooks.
  • Spray gun and wand: A side hook enables you to easily store the included classic ergonomic spray gun and its wand. The gun features a rotating auxiliary side handle to further improve the comfort of both left and right-handed users.
  • Nozzles: The 5 included nozzles, and the respective surfaces they’re appropriate for, are listed in the table below.
 


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 800

The Stihl RB 800

  • Onboard storage: The Stihl RB 800 features a handy storage area, which allows you to neatly store nozzles and accessories and be always prepared by having everything needed at hand.
  • Safety: Safety of operation is enhanced by a thermal relief valve (which helps to prevent internal pump damage), a low oil protection and a trigger lock mechanism (which prevents accidental operation).
  • Accessories: The Stihl RB 800 comes with an owner's manual (opens in a new tab) and some basic documentation to get you quickly started. On top of that, you also get soap hose, pressure hose, oil, spray gun and wand.

Product Videos

The Stihl RB 800'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 800 compare to similarly priced pressure washers.

  • The Stihl RB 800, reaching a PSI of up to 4200, is one of the most powerful gas-powered units in $1150-1500 price range.
  • With a water flow of up to 4 GPM (gallons per minute), this washer belongs to the best of the above-mentioned price range, as it can deliver a high volume of water.
  • Reaching up to 16800 Cleaning Units (PSI x GPM), the RB 800 is one of the most efficient amongst its similarly priced peers.
According to our stats, the following comparison is pretty popular: Stihl RB 800 vs Stihl RB 600.

Price comparison

As you can see from this interactive chart, when compared to other gas-powered washers between 16500 and 17000 Cleaning Units, the Stihl RB 800 is on the average side of the price range.

Therefore, this pressure washer nicely fits in the expected budget for this kind of cleaning power.

The bottom line

STRENGTHS:
  • In the expected price range
  • Triplex pump
  • Good range of nozzles included
  • Onboard storage
  • Several security features
  • High PSI for the price
  • High GPM for the price
  • High CU for the price
WEAKNESSES:
  • No soap tank
  • No detergent dilution mechanism

Do you own the Stihl RB 800 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.)
PSI4200
GPM4
Cleaning Units16800
Engine429 cc 14 HP Kohler CH440 4-stroke OHV
PumpAnnovi Reverberi Triplex
Pump materialBrass
Features
FrameSteel tubing
Soap injectionVia siphon hose
Soap dilutionNo
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose50 ft, ⌀3/8
Hose storageHooks
Misc
Dimensions
(D x W x H)
Approx. 33.5 x 31 x 45.8 in
Weight168 lbs
Pressure controlValve
Wheels2 wheels, ⌀13", 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.

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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 800 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.

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