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Stihl RB 800 - 4200 PSI 4 GPM 429cc Gas Pressure Washer

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 WasherStihl RB 800 4200PSI Gas Pressure WasherStihl RB 800 4200PSI Gas Pressure WasherStihl RB 800 4200PSI Gas Pressure Washer
According to Stihl's Internet Sales Policy (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, Ace Hardware, and Northern Tool (links below) may allow online purchase and in-store pickup of Stihl products.

Features and Specifications

FuelGas-Powered
HandlingHand Truck
WaterCold (125°F max.)
PSI4200
GPM4
Cleaning Units16800
Engine429cc 14 HP Kohler CH440 4-stroke OHV
PumpAnnovi Reverberi Triplex
Pump materialBrass
FrameSteel tubing
Soap injectionVia siphon hose
Soap dilutionNo
Nozzles0°, 15°, 25°, 40°, Soap
Quick connect nozzlesYes
Onboard storageYes
Hose50 ft, ⌀3/8
Hose storageHooks
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
EmissionsEPA
Warranty2 years
UPC886661293766

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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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, unpainted surfaces and high-reach cleaning
  • thorough cleaning of hard, paint-free surfaces
  • cleaning of painted and fragile surfaces
  • application of detergent and cleaning solutions

The following sections will present you in detail its power characteristics and design, its main features and all the additional features it has to offer.

Power

The Stihl RB 800 in use

The Stihl RB 800

Powered by an impressive 429cc (14 hp) engine, its brass triplex pump can deliver a pressure of 4200 PSI (around 70 times more than a standard garden hose) and a flow of up to 4 GPM (values claimed by the manufacturer). Combined, these values mean that the Stihl RB 800 has 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.

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

Design & Handling

Thanks to its hand truck design and approximate dimensions of D33.5 x W31 x H45.8 in, the Stihl RB 800 offers great mobility. The robust steel tubing frame guarantees longevity of 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. The main contributors to its weight are its 429cc Kohler CH440 engine, the triplex pump and steel tubing frame. However, the device’s two 13" pneumatic wheels play a key role in its maneuverability, as they allow it to be manipulated smoothly.

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. It must be noted that the Stihl RB 800 doesn’t come with a soap dilution mechanism. Therefore, you must always make sure that your detergent is correctly diluted. 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 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 low oil protection and a thermal relief valve (which helps to prevent internal pump damage).
  • Accessories: Besides the usual owner's manual (opens in a new tab) and documentation to get you promptly started, the Stihl RB 800 comes with spray gun, oil, pressure hose, soap hose and wand.
  • Emissions: The Stihl RB 800 is NOT CARB-compliant. Therefore, it is not available in California for sale nor purchase.

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 highest PSI values of the gas-powered products in the $1650-2100 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 these interactive charts, when compared to other gas-powered washers between 16500 and 17000 Cleaning Units, the Stihl RB 800 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:
  • 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:
  • On the expensive side
  • No soap tank
  • No detergent dilution mechanism
  • Not CARB-compliant

Do you own the Stihl RB 800 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

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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