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​How To Pick The Best Gas Powered Pressure Washer

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If you are looking to clean the outside of your home , driveway, deck, patio, and vehicles, you need a gas pressure washer. Offering more power than their electric cousins, these pressure washers are ideal for:

  • Making quick work of cleaning your automobile or boat
  • Getting decks and patios squeaky clean for summer BBQs
  • Making the neighbors jealous of your freshly-painted looking home 🙂

Modern gas powered pressure washers offer complete freedom of movement, ergonomic and comfortable design, and for the amount of power – an affordable price tag.

We’ve reviewed hundreds of gas power washers and hand-selected our top picks for your perusal. From safety features to manufacturers’ warranties, we’ve taken it all into consideration. Read on to find out if one of these beauties is right for your needs!


Quick look: The best gas pressure washers in 2019

  • Simpson MSH3125-S – best for most homeowners, powerful & reliable Honda engine
  • WEN PW31 – OHV engine with axial cam pump for added power, quality connections and accessories
  • Generac SpeedWash 6882 – preset PSI settings help prevent surface damage, very well known & liked brand
  • PowerBoss 3100 – powerful Honda engine, very easy to start & long hose
  • Duromax XP2700PWS – comfortable to use with durable, strong frame
  • Pressure Pro E4040HC – highest GPM (4.0) of any of the models I researched – each model tested in the USA

How We Rated the Pressure Washers

A quick search will reveal that there are dozens of different gas powered pressure washers on the market to choose from. We’ve narrowed this list down to our top 6 picks, and we’ve listed each model’s carefully considered pros and cons. Design elements we’ve included in our evaluation are safety features, ergonomics and comfort, engine power, ease of use, manufacturer’s warranties, and of course, pricing.

Reliability (Warranty)

The type of warranty a manufacturer offers often serves as an indicator of how much faith a manufacturer has placed in their product. In the pressure washer industry, the average warranty is 3 years. Here is how the warranties of our chosen pressure washers compare:

  • The Simpson MSH3125-S has a 5-year warranty on the frame, a 2-year limited warranty on the pump, and a 1-year limited warranty on the pump.
  • The Wen PW31 has a two-year limited warranty on all components.
  • No information on the Generac SpeedWash 6882 has been made publicly available.
  • The PowerBoss Gas Pressure Washer is equipped with a 2-year warranty when used for residential applications. When used for commercial applications, the warranty only applies for 3 months.
  • The Duromax XP2700PWS comes with a two-year warranty from the manufacturer.
  • The Pressure Pro E4040HC is equipped with a lifetime warranty on the pressure washer’s frame and a 3-year limited warranty on the engine, pump, and other components. 

Engine Size (CC’s)

At a glance, this is how the engines of each of our top picks stack up:

  • Simpson Cleaning MSH3125-S – Honda GC190 engine
  • Wen PW31 – 208cc, 4 stroke OHV engine
  • Generac SpeedWash 6882 – 196cc OHV engine
  • PowerBoss Gas Pressure Washer – Honda GC190 engine
  • Duromax XP2700PWS Pressure Washer – Duromax 5HP engine
  • Pressure Pro E4040HC – 13 HP Honda GX390 engine 

PSI (Pounds Per Square Inch)

PSI refers to the amount of cleaning pressure an engine can produce. In a pressure washer, PSI can be thought of as the “stripping” action that is used to remove dirt and grime from a surface. In general, the more PSI a pressure washer produces, the more powerfully it can clean. Here is the PSI matchup of our top 6 picks:

  • Simpson Cleaning MSH3125-S – 3200 PSI
  • Wen PW31 – 3100 PSI
  • Generac SpeedWash 6882 – 2900 PSI
  • PowerBoss – 3100 PSI
  • Duromax XP2700PWS – 2700 PSI
  • Pressure Pro E4040HC – 4000 PSI

GPM (Gallons Per Minute)

When it comes to pressure washers, GPM refers to the amount of water a model can produce in a given minute. In most applications, more weight is given to GPM than PSI because rising dirt away is of more importance. Take a look at the GPM comparison for our reviewed pressure washers:

  • Simpson Cleaning MSH3125-S – 2.5 GPM
  • Wen PW31 – 2.5 GPM
  • Generac SpeedWash 6882 – 2.4 GPM
  • PowerBoss – 2.7 GPM
  • Duromax XP2700PWS – 2.3 GPM
  • Pressure Pro E4040HC – 4.0 GPM

Ease of Use

In general, gas powered pressure washers are simple and straightforward to use. Because of the sheer amount of power they produce, they should be handled by an individual in good health; however, this power will also produce the desired results. The only downside to using a gas powered pressure washer is that the machine does require a fair amount of maintenance, like the draining and changing of the oil and regular fuel fill-ups.

How to Pick the Best Gas Pressure Washer for You

How powerful your gas-powered pressure washer will determine what types of applications it is suitable for. The pressure output, or power, of a pressure washer, is measured in GPM and PSI. In general, the higher the GPM and the PSI, the more expensive a model is going to be. The higher these numbers are, the more surface area you will be able to clean in less time. Before buying any pressure washer, you must first carefully consider what you will be using it for and how often.

Light-Duty

A light duty pressure washer is ideal for small residential jobs. These pressure washers generally are rated at between 1200 to 1800 PSI at 2 GPM. They can be used to clean small patios and decks, automobiles, grills, and outdoor furniture. Because they are smaller in size and lightweight, they are readily portable. Electric light duty pressure washers are more readily available than gas-powered models.

Medium-Duty

Medium duty pressure washers are almost exclusively gas-powered. Their PSI rating ranges from 1900 to 3100 PSI at an average 2.5 GPM. However, it is not uncommon to see these models with a rating of 3 or 4 gallons per minute. Higher grades of components are used to construct these models. As a result, they tend to be sturdier and more durable, but they do lose a lot of the portability of light-duty models. A medium duty pressure washer can be used to clean a wide variety of surfaces, including brick, concrete, siding, and driveways and walkways.

Heavy-Duty

Heavy duty pressure washers are primarily used for commercial applications. These professional grade machines produce (in general) a PSI rating of 3200 or higher at 3-5 gallons per minute. They are gas powered and will make short work of large-scale cleaning jobs, like cleaning the exterior of a business. Heavy duty pressure washers are commonly used to strip paint and remove graffiti. This class of pressure washer is mostly considered too powerful for common residential applications.

Difference Between Cheap and Expensive Models

It is a common mistake of buyers to use the price of a pressure washer as a gauge of how “good” it is; however, other factors must be taken into account when making a purchase.

  1. How often will you be using the machine? If you plan to use it only once or twice a year, then a cheap model may suffice; however, be prepared to replace your washer every 2-3 years.
  2. What type of warranty is being offered on the model? As aforementioned, warranties are generally considered a sign of the confidence a manufacturer has in the product they’ve produced.
  3. The initial price of a pressure washer is rarely its only cost. Gas powered pressure washers require regular maintenance, and the costs can add up. If a cheap model offers the same PSI, GPM, and warranty as a more expensive one, it may be more prudent to go with the cheaper model – regardless of the label on the box.
  4. For the level of pressure offered, is there a proportional increase in engine horsepower? Unfortunately, this is something that many cheap models are lacking, which negatively affects the unit’s overall performance.
  5. What does the engine shaft look like? Many cheap pressure washers feature a vertical engine shaft, which significantly shortens the lifespan of the washer. Horizontal shafts are found in more expensive models, but if you plan to keep the pressure washer for more than three years, the expense is well worth it. 

Best Selling & Top Rated Brands

  • SIMPSON
  • WEN
  • Generac
  • PowerBoss
  • DuroMax
  • Pressure Pro
  • Ford
  • DEWALT
  • Briggs & Stratton
  • Powerstroke
  • Karcher
  • Honda

How Much Should I Expect to Pay?

The 6 gas powered pressure washers we have reviewed range in price from  around $300 to $1,700. Our best overall value pick, the Simpson Cleaning MSH3125-S, offers all of the best that a gas powered pressure has to offer at a price on the lower end of this range. It achieved the top rating because of its outstanding design, ease of use, and sheer quality.

Our least expensive model, the Duromax XP2700PWS, is the most affordable. Though it lacks the refinement of its more expensive cousins, it still makes a solid, entry-level choice.

Gas Pressure Washer Reviews

1) SIMPSON Cleaning MSH3125-S Gas Pressure Washer

Likes

  • The high-pressure hose that accompanies this model is abrasion and kink-resistant and is capable of withstanding heavy duty usage.
  • Five unique nozzle tips are included, which can be used in a variety of different applications.
  • The Honda designed motor, at full throttle, reaches 3200 PSI at 2.5 GPM – making it ideal for tough jobs.

Dislikes

  • The engine is loud.
  • Because Simpson outsources its technical support, customers have complained about the length of time it takes to resolve issues.

The Simpson Cleaning MSG3125-S was designed for shop and home applications but offers the same amount of power found in many commercial pressure washers. Its lightweight design is compact, and one person can easily move the pressure washer. The ergonomically-designed spray gun was designed for control and comfort, and the inclusion of multiple nozzle tips increase the machine’s overall versatility. The pressure washer’s frame is crafted from heavy gauge steel components, and the oversized, pneumatic tires increase shock absorption and overall stability. For these, among many other reasons, this Simpson model is our editors’ top choice.

2) WEN PW31 3100 PSI Gas Pressure Washer

Likes

  • This gas powered pressure washer is equipped with a powerful 4 stroke, 208cc OHV engine pump.
  • The design incorporates a reliable axial cam pump for consistent spraying each time it is used.
  • The 30-foot reinforced hose maximizes the lifespan of this pressure washer.

Dislikes

  • This pressure washer is more expensive when compared to models of similar size and capabilities.
  • Some reviewers have found the wheels of the machine to be lacking in maneuverability.

Weighing in a 67 pounds, this compact model is accompanied by a two-year warranty from the manufacturer. Key highlights of this model include five different pressure nozzles, an axial cam pump, a 42-inch locking trigger, and a generously sized soap tank. Reviewers have praised the unit for its easy to use controls, straightforward design, and simple installation process. The 4 stroke, 208cc onboard engine can pump up to 2.5 gallons of water a minute – making it the ideal choice for tackling years of grit and grime.

3) Generac SpeedWash 6882 Gas Powered Pressure Washer

Likes

  • The unique spray gun contains preset pressure controls for wood, cars, concrete, and soap.
  • The 30-foot spraying hose is non-marring and kink-resistant and includes four quick-change nozzle tips.
  • The user-friendly controls are conveniently set in one central location, including the fuel shutoff and on/off.

Dislikes

  • A small number of users have complained about the helpfulness of Generac’s customer service support staff.
  • The nozzle tips are made of plastic, which makes them prone to cracking from extended use.

For an affordable price, the Generac SpeedWash 6882 offers a complete power washing system with best in class power. At the heart of this pressure washer is 196cc OHV engine, which Generac advertises as cleaning up to 50% faster than its competitors. The cleaning attachments that come with the unit include a soap blaster and turbo nozzle. Because it weighs only 57 pounds, this Generac model has been praised for its portability and maneuverability. Assembly and installation is simple and straightforward. This model is a favorite among those who have purchased it.

4) PowerBoss Gas Pressure Washer 3100 PSI Powered by HONDA

Likes

  • This pressure washer is powered by a hearty Honda GC190, 187cc engine, which makes it suitable for both commercial and residential applications.
  • The axial cam pump is equipped with Easy Start technology to minimize the amount of effort required to start it.
  • Its flexible hose has a 25-foot reach.

Dislikes

  • The limited warranty offered by PowerBoss is subpar compared to industry standards.
  • Some reviewers have complained of the engine leaking oil.

This PowerBoss Gas Pressure Washer is designed for the hardworking homeowner. With a solid, powerful engine and a wide array of attractive features, it makes an excellent investment. Highlights of this model’s design include a one-gallon detergent tank, 10-inch pneumatic wheels, and a 24 month, limited consumer warranty. The reinforced hose measures 25 feet long and comes with four, quick connect nozzle tips, which maximize this pressure washer’s versatility. This pressure washer is capable of adequately cleaning hardwoods, vinyl siding, concrete, and asphalt. The included 40-degree spray tip can be used to clean more delicate surfaces, like boats and cars.

5) Duromax XP2700PWS 2.3 GPM 5 HP Pressure Washer

Likes

  • The ergonomically designed handgrip is cushioned to reduce user fatigue.
  • The powerful Duromax engine will automatically shut off when its oil levels drop below a specific point.
  • The strong frame is welded from rugged steel and protects both the pump and engine.

Dislikes

  • The plastic rivets used in the pressure washer’s design have a tendency to crack.
  • A few buyers have had the air filter housing arrive broken.

The Duromax XP2700PWS is designed specifically to tackle dirt and grime. The 5 HP Duromax engine offers excellent cleaning power, and it is capable of producing 2.5 gallons per minute at 3100 PSI. Reviewers have praised it for its easy installation and well-written instructions. The welded frame offers protection to the soap tank and engine, and this model comes with five unique interchangeable nozzles. The axial cam pump is crafted from durable aluminum, and convenient onboard storage is offered for the hose, nozzles, and spray gun.

6) Pressure Pro E4040HC Heavy Duty Professional Pressure Washer

Likes

  • This model is CARB compliant.
  • The included hose has a max reach of 50 feet – one of the longest on the market.
  • In bypass mode, the built-in Thermo Sensor will prevent the engine from overheating.

Dislikes

  • It has an expensive price tag.

The Pressure Pro E4040HC offers the power of a professional-grade model in more affordable packaging. The 13 HP Honda engine produces an astounding 4000 PSI at 4.0 gallons per minute. The frame is made of aircraft grade aluminum to ensure its durability, and it comes with a lifetime frame warranty. The pressure hose has a max reach of 50 feet, and 5 unique pressure nozzles are included with the machine. Each model is assembled and tested in the United States.

Conclusion

At the end of the day, a pressure washer is designed for a single specific job. Therefore, you should only pay for what you plan to use. Each of the models we’ve reviewed offers an excellent investment – depending on how much use you have planned for them. Frequent need and longer jobs will necessitate having a more durable model; however, but for odd, low key household jobs, the less expensive models will do the trick.

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