gas pressure washer

Best Gas Pressure Washer

If you want extra power to handle all sorts of large surfaces and jobs, then a gas pressure washer is what you need. With such a machine at your disposal, you will be able to clean almost anything in short amount of time. Add to that a set of wheels and no place will be out of reach.

With so many models and brands on the market, choosing the right unit can be tough. To help you come to a decision, we’ve done all the research, and now it’s time to present our top picks.

Top 5 Gas Powered Pressure Washers

SIMPSON-Cleaning-3100-PSI-at-2.5-GPM-GasSIMPSON Cleaning MSH3125-S 21 x 34.75 x 23.25 inches2.5 Gallons Per
65 lbs
Generac-6922-2,800-PSI,-2.4-GPMGenerac 692235.4 x 18.8 x 24.4 inches2.4 Gallons Per
57 lbs
Generac-6602-OneWash-3,100-PSIGenerac 6602 OneWash39.5 x 21 x 20.6
2.8 Gallons Per
68.5 lbs
SIMPSON-Cleaning-PS3228-S-3200-PSISIMPSON Cleaning PS3228-S20 x 34 x 25
2.8 Gallons Per
83.2 lbs
Duromax-XP3100PWT-2.5-GPMDuromax XP3100PWT20 x 24 x 39 inches2.5 Gallons Per
75 lbs

SIMPSON Cleaning MSH3125-S – Gasoline Powered

SIMPSON Cleaning MSH3125-S
  • EASE OF USE 90%
At the heart of this residential gas motor pressure washer is a Honda GCV190 gasoline engine. Simpson is a well-known name in this segment, so it was only natural they teamed up with Honda, known for high-quality motors.

This engine sits on a sturdy welded frame made out of steel which has double sealed 10″ pneumatic tires. Thanks to an impressive engine, this model puts out 3,100 PSI and 2.5 GPM, so there’s not much this washer won’t be able to do. The use of an axial cam pump offers better performance while requiring less maintenance.

For improved reach, this cold water machine has a high-quality 25-foot hose included. What’s more, you will get a set of five nozzles for different applications. There are 0, 15, 25 and 40-degree attachments as well as a special soap tip and accessory storage. Another welcome feature is the siphoning tube for detergent. The wand that comes with this unit is a quick connect M22 for fast swapping of nozzles and features a safety lock-out.

Using the SIMPSON MSH3125-S, we found it able to handle any job small or big. If you want excellent and reliable performance, this is a powerful gas pressure washer Honda motor combination.

Generac 6922 Review – Designed with Ergonomics in Mind

Generac 6922
  • EASE OF USE 93%
For people who appreciate power as much as ergonomics, the Generac 6922 is an attractive choice. This gas pressure washer has a unique design handle with a cushion grip and easy-to-squeeze trigger. This reduces fatigue and requires minimal effort to operate. Despite the weight of this model (57 lbs.), you can move it around easily with a set of 10-inch wheels that never go flat.

Behind this incredible piece of washing equipment is a Generac OHV engine. The use of a quality motor translates into impressive performance, thus this unit puts out 2,800 PSI at 2.4 GPM. Water gets pushed through a 25-foot high-pressure hose. Furthermore, the ergonomic wand comes with four different nozzle tips and a soap tip.

There are 0, 25, and 40-degree attachments available which make this a versatile machine. Unlike siphon hose models, this machine has a 1/2 gallon tank for detergent, so you don’t have to refill as often. Finally, to keep all the attachments and hose in one place, the Generac 6922 has accessory compartments near the handle.

During our tests, this gas powered pressure washer worked great on siding, patios, concrete and many other surfaces. It was also easy to use and spray wand proved to reduce fatigue.

Generac 6602 OneWash – Large and Powerful Pressure Washer

Generac 6602 OneWash
  • EASE OF USE 91%
If you’re looking for sheer power, the best pressure washer for the money is the Generac 6602 OneWash. This gas powered model has a flow of 2.8 GPM with a top output  of 3,100 PSI through the included 25-foot hose. Its 212cc OHV engine is the biggest and strongest within its class. To handle all this output, you can adjust it with a dial that we don’t see often. Thus, it’s easy to adapt to the surface you are cleaning and prevent damage.

Thanks to good design, all the controls are in one spot on the front of this machine’s motor. Just like with other Generac units, this one has an ergonomic grip and a smooth inverse trigger on its wand to reduce hand fatigue. Included with this model are three different tips, 0, 25 degrees and a soap tip. To alert users to lower pressure or low oil, two LED  indicators are used on this unit. Finally, there is a set of flat, 11 inch wheels for easy transport.

When we put this model through our test, it performed incredibly. It has power, ergonomics, and versatility. You can clean gutters, cars, driveways, and many other areas with this washer by using the adjustable controls.

SIMPSON Cleaning PS3228-S – Professional Yet Expensive

SIMPSON Cleaning PS3228-S
  • EASE OF USE 93%
For those that want professional quality and don’t mind spending the extra cash, there’s the SIMPSON PS3228-S. This gas power washer comes with a commercial grade Honda GX200 OHV engine and oil alert.

The motor has a triplex plunger pump that offers better performance and longer service life in comparison to axial cam designs.

You can achieve an incredible output of 2.8 gallons per minute at 3200 PSI with this unit. To deliver this power without problems, there’s a 25 foot & 5/16″ MorFlex hose intended for high pressure. It is resistant to kinks and twists but also abrasion damage.

For quick and reliable transport, this model has a welded steel frame, as well as a steel plate for the engine. It sits on a pair of 10″ pneumatic tires built to last that are attached to a solid steel axle. This frame also has an accessory storage for all moving parts.

The safety-lock spraying wand included on this machine has five nozzle tips that work with a quick connect system.  You get 0, 15, 25, and 40-degree angle attachments and a nozzle for soap application. With all these add-ons, no cleaning task during our tests was too hard.

Duromax XP3100PWT – Keeps Driveway and Patios Clean

Duromax XP3100PWT
  • EASE OF USE 93%
The last among our top 5 gas pressure washers, is the Duromax XP3100PWT. This unit comes with a strong 7 HP motor which has a low oil shutdown mechanism to prevent damage. It can spray 2.5 gallons of water per minute at 3,100 PSI with the included 25-foot hose.

When it comes to attachments, you get six different quick connect nozzle add-ons. These include 0, 15, 25, and 40-degree ones, as well as an applicator for soap and a turbo nozzle. This attachment combines 0-degree strength with a rotating design to clean tougher areas. This washer is also equipped with a 0.3-gallon detergent tank for a constant flow of preferred cleaning products. With all these features and attachments, we were able to can clean siding, driveways, cars, patios among other things.

Despite a weight of 75 lbs., you can transport this model with ease thanks to a pair of 12″ wheels made for all terrain. These wheels are part of a sturdy, welded metal frame that has an add-on storage panel ideal for easy access.

All in all, this machine is a serious tool and one of the best because of its strength, versatility, and tempting price.

Choosing the Right Gas Pressure Washer

What to Look For

Just like most other power tools, a gas pressure washer has a few specifications you need be aware of. To help you identify your needs and the products that suit them, you should consider the following things:

  •  Horsepower (HP)
    All pressure washing machines that run gas powered motors have a horsepower rating. The HP rating determines how much volume (GPM) and PSI a unit can put out.
  • Volume in Gallons Per Minute (GPM)
    Along with PSI, the GPM rating is useful when you want to find out the effective strength of a specified unit.
  •  Pressure output in Pounds Per Square Inch (PSI)
    PSI isn’t as crucial as HP & GPM, but it’s still important. PSI matters, but without enough volume and horsepower, it doesn’t make a big difference.
  •  Cleaning units
    Another way to measure the strength of an individual model is by multiplying PSI with GPM.

Things to Avoid

Now that you know the basics of what to look for, you should also find out what you need to avoid. We will list a few things to keep in mind when choosing a gas powered pressure washer.

  • Avoid buying used units
    Gas operated models need more care and maintenance to stay in top condition. If you don’t know the seller personally and how he treats his tools, you could be in for an unpleasant surprise.
  • More power is not always better
    Some people might be tempted to go for the strongest unit, but that’s not always the best decision. You should always consider what you’ll be using your gas pressure washer for.
  •  Avoid extra costs with the right accessories
    Almost all power washing tools come with a few useful attachments. Before you buy a unit, take a close look at what it comes with out of the box. Some of these add-ons make cleaning much easier.

Criteria We Used to Select the Best Product 

Without a clear set of principles guiding us, we wouldn’t be able to choose the best products with consistency. That is why we first determined what to look at and take into consideration. Here is how we chose our top 5 models:



Before we decide which machines to test, we take a close look at all the specifications and features. This way we can weed out bad products and single out the top contenders for testing. Once we narrow our choice down to five models, it’s time to test them and see how they perform.



The second step in our process is to put each model to the test and see how they hold up in different situations. By taking this approach, we aren’t just rehashing features stated elsewhere; we find out if they perform as advertised and report back to you.