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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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Stihl RB 800 4200PSI Gas Pressure Washer
Stihl RB 800 4200PSI Gas Pressure Washer
Stihl RB 800 4200PSI Gas Pressure Washer
Stihl RB 800 4200PSI 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 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

The Stihl RB 800, a heavy duty, commercial pressure washer, gives its user an all-around versatile cleaning experience, topped off by the following features:

  • spot cleaning of hard, paint-free surfaces and out-of-reach areas
  • thorough cleaning of hard, paint-free surfaces
  • cleaning of painted or delicate 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 an impressive 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.

This gas-powered pressure washer’s Kohler CH440 engine is started by a traditional pull-start mechanism.

Gasoline storage is facilitated by a fuel tank with a maximum capacity of 1.8 gallon.

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 robust and sturdy steel tubing frame offers longevity to the assembly. 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. The main contributor to its weight are its 429 cc Kohler CH440 engine, the triplex pump and steel tubing frame. However, the unit is manipulated smoothly thanks to its two 13" pneumatic wheels, which play a key role in its maneuvrability.

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: While the device doesn't feature a soap tank, detergent supply is ensured 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. Whenever a soap nozzle is connected, the detergent is automatically added to the water.
  • Pressure hose: The included 50 ft ⌀3/8" 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. A rotating auxiliary side handle further improves both left-handed and right-handed users' comfort.
  • 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 low oil protection, a thermal relief valve (which helps to prevent internal pump damage) and a trigger lock mechanism (which prevents accidental operation).
  • Accessories: Included with the Stihl RB 800 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, oil, soap hose and spray gun.

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, with a max water pressure of 4200 PSI, has one of the higher PSI values of the gas-powered products in the $1100-1500 price range. 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.
  • Reaching up to 16800 Cleaning Units (PSI x GPM), the RB 800 is one of the more efficient amongst its similarly priced peers. 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 electric start
  • 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
EmissionsN/A
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.

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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