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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 or recommended to buy a NEW Stihl product online in the USA. The only way to buy the Stihl RB 800 online is to get it second hand or refurbished on eBay. Online stores such as Acme Tools (link below) only allow in-store purchase and 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 summary, the Stihl RB 800 is a heavy duty, commercial pressure washer, that offers an all-around versatile cleaning experience, and also:

  • spot cleaning of hard, paintless surfaces and reaching far-away areas
  • intense cleaning of hard, unpainted surfaces
  • cleaning of painted and fragile surfaces
  • applying detergent and cleaning solutions

Ahead are presented its power characteristics and design, its main features and any other additional features.

Power

The Stihl RB 800 in use

The Stihl RB 800

The Stihl RB 800's brass triplex pump, powered by an impressive 429 cc (14 hp) engine, can provide a pressure of up to 4200 PSI (approximately 70 times more than a standard garden hose) and a flow of up to 4 GPM (values claimed by the manufacturer). The Stihl RB 800 thus has a cleaning power of 16800 Cleaning Units.

The Kohler CH440 engine of this gas-powered pressure washer relies on an old-school pull-start mechanism to get started.

The fuel is stored in a tank, which can hold up to 1.8 gallon of gasoline.

Design & Handling

With its hand truck design and approximate dimensions of D33.5 x W31 x H45.8 in, the Stihl RB 800 provides great mobility. The strong steel tubing frame assures assembly longevity. The folding handle enhances its mobility, while allowing for a convenient storage.

With a weight of 168 lbs, the model is not lightweight. Therefore, it may be challenging to manually carry it around and transport it. 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 unit’s two 13" pneumatic wheels are crucial to its maneuvrability, since they provide a smooth method of manipulation on the job.

Main Features

The Stihl RB 800 in use

The Stihl RB 800

Along with the Stihl RB 800 itself, the package also includes a spray gun, a wand, a pressure hose, 5 nozzles and a detergent injection feature, which are discussed in further detail below.

  • Soap injection: Even though the device doesn't have a soap tank, detergent is supplied by a siphon hose. As the Stihl RB 800 doesn’t include a soap dilution mechanism, the user must provide a correctly diluted detergent before proceeding to use it. The detergent will be added automatically to the water when a soap nozzle is attached.
  • Pressure hose: A neat storage for the included 50 ft ⌀3/8" high-pressure hose is facilitated by a set of convenient hooks.
  • Spray gun and wand: A side hook allows for an easy storage of 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 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 800

The Stihl RB 800

  • Onboard storage: The Stihl RB 800's handy storage area lets you store nozzles and accessories, and thus, you’ll be always prepared and have everything necessary for the job at hand.
  • Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation), a thermal relief valve (which helps to prevent internal pump damage) and a low oil protection.
  • 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 oil, soap hose, spray gun, wand and pressure hose.

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, which can reach up to 4200 PSI, has one of the higher pressure outputs of the gas-powered units that cost between $1150 and $1500. If the highest possible power of the water stream is your priority, one of the champions in this price range is the Lifan LFQ4515E-Elite with 4500 PSI.
  • The water flow of this washer, which reaches up to 4 GPM (gallons per minute) is one of the highest values found in the above-mentioned price range.
  • The RB 800, which reaches up to 16800 Cleaning Units (PSI x GPM) is one of the more efficient, in comparison to its similarly priced counterparts. If the highest overall cleaning power is your top priority, the Lifan LFQ4515E-Elite, which can reach up to 18000 Cleaning Units, is one of the most efficient of the devices in the current price range.
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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