Generac 7899 - 2900 PSI 2.4 GPM 196cc Gas Pressure Washer
The Generac 7899 is a gas-powered pressure washer offering a maximum water pressure of 2900 PSI and flow of 2.4 GPM. (Read full specs)
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Description
Generac’s SpeedWash™ residential grade pressure washers provide you with a complete washing system featuring best-in-class cleaning power. This complete cleaning system includes a family of innovative cleaning attachments to deliver better cleaning results in less time.
Zoom on the Generac 7899
The Generac 7899 is a heavy duty pressure washer, that provides its users with an all-around versatile cleaning experience, and enables:
- precise spot cleaning of hard, unpainted surfaces, reaching elevated areas, and effectively removing stubborn stains
- delicate surface cleaning, andbroad area cleaning with reduced pressure
- using cleaning solutions, and rinsing surfaces to remove residue
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
Powered by a 196cc engine, its aluminum axial cam pump can deliver a pressure of 2900 PSI (around 48 times more than a standard garden hose) and a flow of up to 2.4 GPM (values claimed by the manufacturer). With these values combined, the Generac 7899 boasts a cleaning power of 6960 Cleaning Units.
The Generac engine of this gas-powered pressure washer is initiated by a classic pull-start mechanism.
Containing gasoline, the pressure washer's fuel tank can hold a maximum of 0.8 gallon.
Design & Handling
The hand truck design of the Generac 7899 ensures effortless movement and transportation. With its strong steel frame, the assembly is built to last, providing stability and safeguarding internal components, even in challenging environments. The rubber-padded fixed handle adds to the 7899 convenience of transport, while offering a comfortable grip.
With a weight of 57 lbs, this unit is designed for ease of maneuverability, catering to a wide range of users. A significant portion of this weight is attributed to the inclusion of the 196cc Generac engine and a sturdy steel frame. Yet, its two 10" never-flat wheels ensure the 7899 remains effortlessly maneuverable.
Main Features
Along with the Generac 7899 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: A safe detergent storage is facilitated by a 0.5 gal tank. As the Generac 7899 does not include a soap dilution mechanism, it's essential to ensure proper detergent dilution before operating the pressure washer. Connection of a soap nozzle triggers the pressure washer to automatically incorporate the detergent into the water stream.
- Pressure hose: For easy organization, the included 25 ft ⌀1/4" high-pressure hose (3400 PSI rating) can be stored on the unit using a set of convenient hooks when it's not in use, ensuring a clutter-free workspace.
- Spray gun and wand: A side hook enables you to easily store the included PowerDial spray gun and its wand.
- Nozzles: Refer to the table below for details on the 5 included nozzles and their recommended surface applications.
0° | 25° | 40° | Soap | Turbo | |
|---|---|---|---|---|---|
| Concrete, brick, masonry | |||||
| Siding, gutters, house | |||||
| Fencing, deck, patio | |||||
| Lawn equipment, boat, RV |
Please note: The shapes of the nozzles depicted above are for illustration purposes and may vary. Symbols used include a for 'Not recommended,' a for 'Suitable,' and an for 'Use with caution.'
Other Features
- PowerDial™ gun: The PowerDial™ ergonomic spray gun features 4 different power modes, which can be selected simply, according to your cleaning task – soap, wood, concrete or car.
- Soap Blaster: The Soap Blaster attachment achieves a 3x longer spraying distance than a standard nozzle tip, allows you to penetrate tough stains and improves your overall cleaning results.
- Onboard storage: The Generac 7899 allows you to be always fully prepared, as it features a handy storage area, where nozzles and accessories can be stored.
- Pressure control: Water pressure can be manually changed, using the adjustable throttle of the trigger gun.
- Safety: Safety of operation is enhanced by a trigger lock mechanism (which prevents accidental operation) and a thermal relief valve (which helps to prevent internal pump damage).
- Accessories: Included with the Generac 7899 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 spray gun, funnel, pressure hose, Soap Blaster nozzle, wand and oil.
Product Video
The Generac 7899's performance versus other pressure washers
The following charts are provided to give you an idea of how the key specs of the Generac 7899 compare to similarly priced pressure washers.
- With 2900 PSI, the Generac 7899 achieves a lower pressure when compared to similarly priced gas-powered pressure washers within the $400-500 range. If you're going after the highest possible power of the water stream, one of the best in this price range is the Kärcher G3400P that can reach up to 3400 PSI.
- As this washer can produce a flow of water of 2.4 GPM (gallons per minute), it is average in terms of water volume for the above-mentioned price range. If you're looking for optimal debris removal capabilities, consider the Excell EPW2123100 as one of the top choices in this price range, with a flow rate of 2.8 GPM.
- The 7899's Cleaning Units, 6960 CU (PSI X GPM), fall into the lower end when compared to gas-powered devices of similar price. If you consider the highest overall cleaning power as a really important factor, the Excell EPW2123100 and its 8680 Cleaning Units has one of the highest cleaning efficiency of all the similarly priced units.
Price comparison
As you can see from these interactive charts, when compared to other gas-powered washers between 6500 and 7000 Cleaning Units, the Generac 7899 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
- In the expected price range
- Good range of nozzles included
- Onboard storage
- Several security features
- Decent GPM for the price
- No detergent dilution mechanism
- Low PSI for the price
- Low CU for the price
Features and Specifications
| Fuel | Gas-Powered |
|---|---|
| Engine | 196cc Generac 4-stroke OHV |
| Pump | Axial Cam |
| Water | Cold (100°F max.) |
| PSI | 2900 |
| GPM | 2.4 |
| Cleaning Units | 6960 |
| Pressure control | Via gun |
| Frame | Steel |
|---|---|
| Pump material | Aluminum |
| Handling | Hand Truck |
| Wheels | 2 wheels, ⌀10", never flat |
| Weight | 57 lbs |
| Dimensions | Approx. 24.2 x 18.9 x 35.5 in (D x W x H) |
| Hose storage | Hooks |
| Soap injection | Yes |
|---|---|
| Soap tank | 0.5 gal |
| Soap dilution | No |
| Nozzles | 0°, 25°, 40°, Soap, Turbo |
| Quick connect nozzles | Yes |
| Onboard storage | Yes |
| Hose | 25 ft, ⌀1/4 |
| Security | Trigger lock and thermal relief valve |
|---|---|
| Emissions | CARB, EPA |
| Included accessories | Oil, funnel, wand, PowerDial spray gun, high pressure hose, 5 nozzles, Soap Blaster nozzle |
| Warranty | 3 years |
| Series | SpeedWash™ |
| UPC | 696471077315 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About Generac
Founded in a garage in Wales, Wisconsin by Robert Kern and five employees, Generac has been a leader in power generation systems since 1959. In the early 1960s, Generac began producing electric generators for Sears and Roebuck Company. During the 1970s the company began to manufacture other outdoor power equipment such as electric chainsaws, pressure washers, and welders. Generac, now a subsidiary of CCMP Capital, continues to be headquartered in Waukesha, with manufacturing facilities in four other cities in Wisconsin USA.
Warranty Information
The Generac 7899 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the unit.
For more information about the warranty of Generac pressure washers, please consult Generac's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-888-GENERAC (888-436-3722).




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