10 Best Gas Pressure Washer Reviews & Buying Guide

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March 27, 2020
Gas power washers are designed to emit strong highly-compressed jets of water that can easily remove hard stains. People usually use them to clean different areas of their home exterior, such as 15 years of accumulated grime, driveways or patios, but they’re also suitable for hard floors made from concrete or brick.

An average gas pressure washer comes supplied with a water inlet (packed with a hose), an engine, a water pump, a high-pressure hose, and one or several cleaning attachments.

Different models come supplied with different features – the length and durability of the hose is strikingly different when we compare budget and professional models, the strength (and size) of the engine vary from model to model, and the cleaning attachments might be integrated into the power washer, or they could be removable.

Additionally, brands don’t always ‘supply’ their power washers with attachments. In a lot of cases you’ll have to purchase them separately.

Our professional team come up with the 10 best gas pressure washer reviews that worth your money.
 

What We Can Do With Gas Pressure Washer?

  • 15 years of accumulated grime
  • Driveways
  • Concrete patios
  • Brick walls and objects
  • Stairs, walkways
  • work truck/ abandoned truck
  • ARM Tanker cleaning, M24 Chaffee
  • Cleaning off the paint lines
  •  

    Top 10 Gas Pressure Washer Reviews

     
    1

    Our Top Pick: Simpson Cleaning MSH3125 MegaShot

    Let’s start off with Simpson Cleaning’s MSH3125 MegaShot pressure washer. Basically, this is a powerhouse that promises quite a lot in terms of versatility and performance. Apart from having a remarkably strong engine, this gas pressure washer is unusually small and compact too.

    This is one of the best gas cleaners for people who are not entirely familiar with these contraptions – it’s very easy to use, simple to store, and it requires minimal maintenance. On top of that, it comes supplied with premium quality features and is definitely one of the best gas pressure washer models you can find in the price range. Let’s see what it can offer you.

    What We Like:

    The thing we generally liked the most about this gas pressure washer is the fact that all of its features work in harmony to provide for easy rapid cleaning.

    It rocks welded-steel construction and 10-inch pneumatic wheels, and on top of that, it also comes supplied with five quick-connect nozzles so you can adjust the spraying angle on the fly.

    Furthermore, it boasts 3.2K PSI performance and can dish out 2.5 gallons per minute; this alone is more than enough for day to day use.

    We also liked the fact that this gas pressure washer has a very small, compact frame. It is incredibly easy to store and move from place to place, especially due to the fact that it features sturdy all-terrain wheels.

    The OEM Technologies cam pump requires absolutely zero maintenance, unlike most similarly priced models that need to be scrubbed and cleaned after each use.

    What we did not like:

    In all fairness, Simpson Cleaning’s MSH3125 is a perfect all-rounder. It doesn’t lag in any field of performance, but it could’ve been just a tad more powerful. Namely, 2.5 gallons per minute isn’t anything particularly praiseworthy. Most high-quality electric pressure washers could top it in this area; even so, it does operate at 3200 PSI, which compensates for this little flaw.

    Now, it’s not that we didn’t like the attachments that Simpson Cleaning’s MSH3125 pressure washer comes supplied with; it’s the fact that they’re sold separately. As you’ll be able to see in further reviews, a lot of the models we’ve covered come supplied with at least one (often unique) attachment as a complementary feature.

    You’ll be able to get the 16-inch extension wand attachment and the surface scrubber hose attachment, but you’ll have to purchase them separately.

    Our verdict:

    MegaShot power washer is a schoolbook example of what a high-quality pressure washer should look and perform like. Its power rating isn’t anything special, and 2.5 GPM is the industrial standard. However, if we pay a bit more attention to details we notice that it sports a lightweight, yet incredibly durable frame; its pneumatic wheels are easy-rolling and tough as a bag of bricks; most importantly, it comes supplied with Honda’s GC190 engine that ensures a reliable, consistent performance at all times.
     
     
    2

    Best Choice: Generac SpeedWash 7122 Gas Pressure Washer

    Generac is one of the industry leaders as far as electric contraptions are involved; they offer a huge selection of quality generators, pressure washers, water pumps, and power tools, so we took out their Speed Wash 7122 for a test drive.

    In comparison to our earlier pick, the Simpson Cleaning’s MSH3125, Generac’s Speed Wash obviously has a bit bigger frame. Even though it’s huge, it’s actually quite portable as well due to the big, sturdy wheels it comes supplied with.

    At first glance, this gas power washer looks like a tank; what came as no surprise is the fact that it actually performs like one as well. It boasts 3200 PSI at 2.7 GPM, numerous gratis attachments, and a top-quality Generac 196 CC engine.

    What we liked:

    The Generac Spray Gun is definitely one of the most exquisite features this remarkable gas power washer comes supplied with. On top of the fact that it’s ergonomic and very comfortable to the hand, it also features on-board controls that you can use to modify the pressure level on the fly. You’ll be able to easily swap between car washing, block cleaning, and soap dispensing features with it.

    Secondly, we really loved the complementary attachment features. The Generac SpeedWash 7122 sports a turbo nozzle attachment that is specifically built for cleaning up dirt. The second attachment is the Soap Blaster – you can use it to completely clean pretty much anything given the fact that this power wash sports a huge PSI rating.

    Speaking of which, the SpeedWash 7122 boasts 3200 PSI power; even though there are plenty of stronger gas cleaners, this one does the job for the money, and then some.

    Last, but not least, you’ll also get a 30-feet pressure hose; it’s king resistant and non-marring, so it would be a huge understatement to say that it’s ‘durable’. We should also mention the four quick-lock nozzle tips that aim to provide you with means to easily adjust the spraying angle between 0 and 40 degrees.

    What we did not like:

    Most people who have used Generac’s SpeedWash have complained about its wheels being terrible. We don’t find exactly share that opinion, but they could’ve been made a bit more ‘convenient’, especially since portability is a pretty big deal for a power washer as huge as this.

    Even though most of the construction is pretty robust, certain parts are made of flimsy plastic materials and can break quite easily. For instance, the wand holster is poorly secured

    Our verdict:

    SpeedWash is big and clunky, but with some experience you’ll be able to navigate through its many features. It rocks a powerhouse of an engine and a fairly long hose, but the reason why it’s one of our top picks is because it’s so versatile.

    The spray gun features an on-board power-dial where you can input the type of task you intend to perform, there are four nozzle tips for you to switch between, and you can set the machine into manual and recoil mode for additional versatility.

    3

    Powerful Washer: WEN PW3100 3100 PSI Gasoline Washer

    Next up is Wen’s PW3100 3100 PSI gas power washer. At first sight, you might get the impression that this crude contraption is all about power. Even though that’s not too far from the truth, the PW3100 offers way more than sheer, brute force.

    It packs a very well-rounded set of features, all of which are exceptional in terms of quality and functionality. One of the best things about it is that there are stickers all over it that will constantly remind you of how to properly use each of its features.

    It rocks the exquisite 208 cc four-stroke OHV engine that can pump out 2.5 GPM, and on top of that, it sports 3100 PSI rating. The PW3100 also comes outfitted with an axial pump and a 30-foot hose, built-in soap tank, and a complementary quick-connect spray gun. Additionally, it rocks a set of 12-inch wheels for superior transportation.

    What we liked:

    Pretty much every single feature Wen’s PW3100 comes supplied with is super likable. Its engine is very powerful and allows for rapid cleaning, the hose is not only long, but it’s also reinforced for additional durability; what’s more, the wheels are actually very easy to use, unlike the ones supplied to most similarly priced models.

    The addition of the built-in soap tank allows you to swat two flies with one shot as you’ll be able to thoroughly clean whatever you aim at.

    Furthermore, even though this is a relatively basic feature, it’s great that you’ll also get 5 quick connect nozzles free of charge. These nozzles allow you to easily manipulate the angle (and thusly, strength) of the spray, which basically means that you can adapt to different cases and scenarios with great ease.

    Last, but certainly not least, let’s not forget to mention how durable this beautiful power washer is. It is built like a tank, and it would be a huge understatement to say that it could survive years and years of use on end.

    What we did not like:

    There’s just one thing that could have been improved in the design of Wen’s PW3100. Essentially, this is a strong power washer with a robust motor, but apparently it’s not meant to be used at ‘full power’ for extended periods of time.

    Some people have reported that their hoses (the ends of the attachments) exploded after a couple of hours; others have noted that the unit simply turns down randomly without any specific reason. These may be isolated cases, although it’s always better to be safe than sorry; avoid using the machine at max power for longer than an hour and it should continue functioning as intended.

    Our verdict:

    Wen’s PW3100 is arguably one of the most compact gas-pressure washers on the market. Despite its tiny appearance, it packs quite a punch – 3100 PSIs at 2.5 gallons per minute are no trifling matter, and you can rest assured that it will get the job done since it sports several onboard attachments, such as the soap tank, quick-connect spray gun, and the M22-threaded hose.

    4

    Champion Power Equipment 3200 PSI Washer

    Champion Power Equipment’s gadgets, just like the name suggests, are indeed champs in various branches of the power tool industry. They offer a huge catalog of generators, power washers, log splitters, wood chippers, and plenty of other quality tools. People who are looking for the best gas pressure washer should at least take this particular model into consideration.

    The brand labels the Champion 3200 PSI as powerful and versatile, and we tend to agree in full. It sports 3200 PSI rating and can dish out about 2.4 gallons per minute; this amount of force is provided by the Champion’s patented 224 cc single-cylinder OHV engine.

    On top of that, it packs a variety of accessories, including the extension wand, a trigger gun, and five quick-attach nozzles, as well as a huge 25-foot pressure hose, a 4-foot soap hose, and two 0.5-gallon detergent tanks built into the construction.

    Suffice to say, this powerhouse of a power washer was obviously designed to tackle any chore bestowed upon it, and you can rest assured that it will deliver anytime, anyplace.

    What we liked:

    Champion’s 3200 PSI power washer comes outfitted with a robust OHV engine. It doesn’t hum like crazy, although it wouldn’t really be fair to say that it’s soundless. What we really liked about this remarkable power washer is the fact that it rocks a multitude of complementary features.

    It rocks a trigger gun, an extension wand, and quick-release nozzle attachments, as well as built-in detergent tanks that are as easy to use as they are easy to maintain. Putting it shortly, this gas power washer has everything you need already built-in.

    What we did not like:

    While a rating of 3200 PSI is quite great, commendable even, the 2.4 GPM rating isn’t so exemplary. This just goes to show that this power washer can and will dish out incredibly strong compressed jets of water, although for this kind of money you could find a model that can pump out even more water.

    On the brighter side, this means that Champion’s pressure washer has a lower water consumption rating, which only means that you’ll have a bit less scary water bill at the end of the month.

    Due to the lack of GPM, you might find yourself in a position where you will need a bit more time to finish up the power washing process. That’s about the only flaw we thought could be improved as far as Champion’s 3200 gas power washer goes.

    Our verdict:

    Everyone who has used Champion’s 3200 PSI power washer can tell you that it’s a great bargain for the price. It doesn’t require much in terms of maintenance, and it’s very rewarding performance-wise.

    5

    SIMPSON Cleaning PS3228 PowerShot

    Here’s another model from Simpson Cleaning’s assortment of goods. We’ve seen what the MegaShot can do, so let’s compare its performance with the PowerShot PS3228 so you can get a better perspective of what you are browsing, shall we?

    First of all, the basic specs of the PowerShot are as follows; it sports 3300 PSI and can dish out 2.5 gallons per minute; it’s outfitted with Honda’s GX200 ultra-quality engine with oil alert; a triple-A triplex-plunger pump with Power Boost technology, and a huge MorFlex non-marring hose.

    Its welded steel frame leaves nothing to chance as far as durability is at stake, and it also rocks 10-inch pneumatic wheels that significantly boost its transportation ability.

    What we liked:

    Anyone who knows a thing or two about gas power washers can tell you that Simpson Cleaning’s PS3228 looks, feels, and performs well beyond its price tag. We’ve liked how every feature seems to have an upgrade or two in comparison to the industry standards.

    The Honda’s GX200 power engine features the oil alert; the plunger pump sports the Power Boost technology that provides a reliable and consistent flow of water; on top of that, it also comes supplied with a highly robust welded steel frame.

    In comparison to the MegaShot, he PowerShot sports 3300 PSI (100 more than the MegaShot), and roughly the same GPM rating (2.5).

    What we did not like:

    Even though there are a lot of differences between MegaShot and PowerShot, there are still too many similarities between them that some might say ‘why is there even a need for both models?

    It’s almost obvious that PowerShot is superior, but it’s also a bit pricier. It’s up to you to decide whether you deem the upgrades valuable enough.

    Our verdict:

    Simpson Cleaning’s PowerShot boasts all-around performance and offers zero compromise when it comes to cleaning up any sort of mess. It has the wheels of a tractor and enough power to bring down an elephant, but it also sports a highly robust frame and a variety of unique features, including MorFlex hose, and the patented PowerBoost technology.

    6

    DEWALT DH4240B 4200 PSI Heavy Duty Washer

    People who are looking for a power washer with an ultra-strong PSI rating should definitely check out what DH4240B has to offer. It’s the strongest gas pressure washing machine we’ve covered so far, and it packs a versatile array of top-shelf features.

    The first and most notable feature of a DH4240B power washer is the triplex pump supplied with pistons, an adjustable unloader, as well as with a thermal relief valve.

    The 10-gauge steel construction promises quite a lot in terms of durability, and it also sports 1.25-inch handles made of tubular steel and a 5/8-inch axle made of solid steel. Dewalt’s DH4240B sports 4200 PSI, but it also weighs a ton.

    What we liked:

    The rating of 4200 PSI is evidently superior to everything we’ve seen thus far. This is the highest rated gas pressure washer in our review, and it’s suitable for any heavy-duty cleaning job, no exceptions. You can clean every little bit of your home exterior with it, including patios, walls, sidewalks, barbecues, and such.

    The five quick-connect nozzles are a feature you should expect every high-quality power washer to come supplied with, so it’s nice that this model features them too.

    What makes this model stand out from similarly priced gas power washers is the fact that it’s built to withstand a tremendous amount of abuse. The 10-gauge steel construction and solid steel welded axle are just incredible; no matter what you do to this power washer, it will simply shrug off any potential damage with ease.

    What we did not like:

    Although DeWalt’s DH420B gas pressure washer does come supplied with two big wheels, it’s still one of the least transportable power washers in our review. It weighs approximately 130 pounds, so you’ll need to use quite a bit of force to move it from place to the other.

    Additionally, 4200 PSI means that it’s not particularly suitable for cleaning your home exterior. It’s just too strong, and the pressure can easily damage your floors and break windows.

    Apart from that, everything appears to be in order. You might need a couple of weeks until you understand how to properly angle the power washer in order to push it without straining yourself too much, but that’s pretty much it as far as potential drawbacks go.

    Our verdict:

    Though big, bulky, and perhaps even a bit unwieldy, DeWalt’s DH4240B is one of the strongest power washers out there. Its PSI rating is almost unparalleled, and it packs 10-gauge steel frame to keep its superpowers at bay. It’s perfect for people who want to be done with the cleaning process as fast as possible; we recommend exercising caution while using it, though, as it can send you flying if you lose focus.

     
     
    7

    Ford 3,100 PSI Gas-Powered Pressure Washer

    Ford offers a huge selection of premium-quality gas pressure washers, and suffice to say, the FPWG3100H-J is one of the best models they’ve put out on the market so far.

    This remarkable machine comes with 3100 PSI at 2.5 Gallons per minute; it sports a 208 cc OHV engine, a 3-piston axial pump, and a sturdy heavy-duty powder-coated frame. On top of the fact that it’s built to last, this gas power washer also sports a variety of accessories, including the fully ergonomic spray-gun attachment, six quick-connect nozzles, and a 3-inch high-pressure hose.

    What we liked:

    This model is available in 1650, 1800, 2700, and 3100 PSI, so you basically get to choose how powerful the jet streams are. On top of that, it’s not ‘overly strong’ and can be used to clean both interior and exterior areas of your home.

    Ford’s engines and technologies are some of the finest in the industry, and the 208 cc OHV engine packs such a punch for the buck that it might leave you speechless. There’s also a built-in soap reservoir that is completely adjustable; you’re free to use whichever cleaning solution you want as it has a very well-rounded filter.

    Given the fact that Ford is one of the most popular car manufacturers, you should expect quite a bit from the wheels they’ve supplied to this gas pressure washer model. The wheels are suitable for use on all terrains and are incredibly easy to use.

    What we did not like:

    The only thing people didn’t like about Ford’s gas power washer is the hardware. Namely, it comes supplied with plastic rivets. Several self-taping screws are also included, and they’re not particularly durable.

    Luckily, replacing the hardware with more quality pieces shouldn’t cost you more than $10 tops, so this is not such a terrible problem after all.

    Our verdict:

    If you demand quality and performance, by all means, go for Ford’s 3100 gas pressure washer. This particular model is strong, well-rounded, and built to last. It’s among the most portable gas powered washers on our list, and its PSI rating is absolutely amazing. It does consume quite a bit of water, so it’s not the most economical power washer, though.

    8

    SIMPSON Cleaning CM60912 2400 PSI

    After PowerShot and MegaShot, we have Simpson Cleaning’s CM60912 – the Clean Machine. This model is nothing like its bigger cousins – it sports a lower PSI rating, it consumes less water, but it’s also less expensive and more portable.

    What we liked:

    The portability of CM60912 is the first thing we adored about this gas pressure washer. Moreover, its engine (149cc OHV) is nearly soundless and still strong enough to put up with 2400 PSI and 2 GPM. In fact, this might just be the best quiet gas pressure washer we’ve come across so far.

    It’s smaller and more compact than most similarly priced models, and it also packs a pair of two easy-rolling wheels. The Clean Machine also requires very little in terms of maintenance.

    What we did not like:

    The only bad thing about Clean Machine is that it has only a 2000 PSI pressure rating. Most people who need to tackle heavy-duty chores would opt for a stronger electric power washer.

    Our verdict:

    Given the fact that Simpson’s Clean Machine has a powerful engine and a well-rounded assortment of accessories atop its very attractive price, it’s more than fair to label it as one of the best budget gas pressure washer models on the market.

    9

    PowerBoss 3100 MAX PSI at 2.4 GPM Washer

    The PowerBoss 3100 is a wonderfully designed, and possibly the best gas power washer supplied with everything you need to clean even pretty much anything. It sports 3100 PSI and operates at 2.4 gallons per minute; sports the Honda GC190 easy start engine; a maintenance-free axial pump, and four quick-connect nozzles, including a soap nozzle.

    What we liked:

    The PowerBoss power washer is obviously built with convenience in mind. It’s quite compact for a powerhouse pressure washer, and its transportability is nearly unparalleled due to the big, treaded tires it comes supplied with.

    On top of that, it features an onboard detergent tank and a maintenance-free pump packed with EasyStart technology.

    What we did not like:

    For some reason, people don’t seem to like the hose this power washer comes supplied with. It’s not flimsy per se, but it’s slightly shorter than you’d expect.

    Our verdict:

    The easy-rolling PowerBoss power washer is strong, well-rounded, and quite easy to use and store. It’s definitely one of the best gas powered pressure washer models and we recommend it to everyone who’s looking for an all-around cleaning solution.

    10

    NorthStar Gas Cold Water Pressure Washer

    Let’s wrap it up with NorthStar’s gas power washer. This is a budget model that promises quite a lot in terms of performance, and the fact that it comes supplied with such high-quality features at such a low price is staggering in itself. It sports Honda’s 270cc engine that boasts a nearly soundless method of operation, a rugged welded construction, and a direct-drive triplex pump.

    What we liked:

    Even though NorthStar’s gas pressure washer doesn’t really excel in any particular field of performance except affordability, it has all key aspects covered. It’s durably built; it’s versatile enough to adapt to different cleaning tasks, and it’s not too loud.

    What we did not like:

    While the pump is pretty great, the hose isn’t. It’s not as durable as it should be, so you should consider upgrading it as soon as possible.

    Our verdict:

    This power washer model comes supplied with top-shelf features, and its performance can be described as reliable and versatile. Its direct-drive pump is stronger than average, and its welded frame provides it with enough endurance to survive decades of use. It’s a bit clunky, though, so learning how to use it properly might take some time.

     
     

    Buying Guide

    There are only a couple of things you should take into consideration when you’re looking for a gas-powered washer, including:

    PSI rating

    The PSI (pounds per square inch) rating basically translates to ‘power’. The higher the number is, the more powerful the gas power washer is. A gas-powered washer typically sports around 2,000 to 3,000 PSIs, which is roughly a 1,000 more than the average for electric-powered washers (1,000 to 2,000).

    There are powerhouse models that boast over 4,000 PSIs, but they aren’t recommended for beginners. This amount of compressed water pressure can send you flying if you don’t know how to properly control it.

    GPM rating/water consumption

    The GPM stands for ‘gallons per minute’ and is in tight correlation with the PSI rating. Basically, this number tells you how many gallons of water your power washer can dish out in a single minute. Models with a high GPM rating, obviously, consume a lot more water, but they’re also more efficient and make the cleaning process less time-consuming.

    Durability

    The durability of a power washer is very important, especially due to the fact that gas-powered models can ‘destroy themselves’ if any part is flimsy. There are so many connectors onboard, and the ‘weakest link’ might end up destroying the whole contraption in a split second.

    The frames of top-quality power washers usually boast welded-steel construction, but a durable power washer also sports robust hardware and ‘connectors’ (hose, nozzles).

    Attachments

    Attachments are very important as they alter the performance of a gas pressure washer when used. There are all kinds of gas pressure washer attachments, such as the extension wand, the spray trigger gun, the soap dispenser, brooms, and plenty of others.

    Now, a good pressure washer can be worth the money even if it doesn’t come with any attachments. You can always purchase them from the same or other brands, but note that these can sometimes be quite expensive.

    Transportability & Compactness

    The size of a pressure washer dictates how much space you’ll need to free up for its storage. That being said, you should probably avoid big, bulky models if you don’t have any space left in your shed or garage.

    Transportability, on another hand, is measured by the power washer’s ability to be moved from place to place with an average amount of effort. Nearly all models come supplied with wheels; some wheels are designed to be used on all kinds of terrains while others excel in certain spheres but completely fail in others.

    Intended use

    Shortly put, electric power washers are best for interior use while gas washers are perfect for outdoors.

    If you want an all-around solution, you should consider a smaller gas-powered pressure washer with a PSI rating of around 2,000. Even though most electric washers could do the trick, they’re not suitable for cleaning home exteriors, so you’ll be swatting two flies with one hit this way. A good example of a ‘weaker’ gas-powered power washer is Simpson Cleaning’s Clean Machine.

    Difference Between Gas & Electric Pressure Washer

    In short, gas pressure washers and electric power washers use different ‘sources’ of power, which is the main and most obvious difference between them. However, this little fact amounts so very little; it’s the small details that really set gas and electric pressure washers apart.

    First and foremost, gas power washers usually have a higher PSI (pounds per square inch) pressure rating. This means that they’re capable of handling heavy-duty tasks, such as cleaning concrete floors, patios, and pretty much everything that stands in front of the spray gun. The average PSI rating of a gas pressure washer is between 2,000 and 2,800, although models with above 4,000 exist too.

    They’re perfect for cleaning stairways and large vehicles; however, they really shine when it’s time to clean areas or objects that have been neglected for a while. Extensively dirty objects that have been lying around for years pose no problems for gas-powered washers. Electric power washers, on another hand, couldn’t do much in this particular scenario.

    Electric pressure washers usually have around 1,300 – 1,700 PSI. This basically means that they put up nearly half as much pressure, but that’s not necessarily a bad thing.

    We could perceive gas pressure washers as the ‘ultimate cleaning tools for heavy-duty’ tasks while the electric-powered models are more ‘specialized’ tools suitable for those cases when a delicate touch is needed.

    How To Use a Gas Pressure Washer

    All gas power washer models are different, but they are meant to be used in a relatively similar way. In a nutshell, you’ll need to turn the engine up, set the controls to your preference, attach any adjustments, and start cleaning.

    While you could just ‘point and shoot’ with an electric power washer, the situation is a bit more complex with gas-powered washers.

    Namely, gas-powered pressure washers have a huge PSI rating, which means that they’re much harder to control. In fact, most models shouldn’t be used on maximum settings, and luckily, only a handful of people will ever even need to. This amount of pressure is so high that it could scrub off car paint in an instant on lower settings or even pierce through a (weaker) wall on the highest settings.

    The key to properly using your gas power washer is not in trial and error; in fact, some people might only use it once and think it’s too dangerous.

    Be careful and observant of the changes on the object (area) you are cleaning with a power washer. For example, if the paint starts to go off, it’s most likely that you are either too close or using the wrong nozzle attachment (the water is too compressed).

    Safety Tips

    In order to properly use your gas pressure washer, make sure to follow these steps:

    1. Check the oil before starting the engine

    Oil can turn stale in a month; that’s when oxidation kicks in. Every day that the oil is oxidizing, pockets of solidified gasoline are building up inside the tank. These layers can clog the reservoir or make the hose explode in worst-case scenarios. Drain all the fuel once the oil starts to ‘smell bad’ or use oil stabilizers to keep using it for longer periods of time.

    2. Check all the connections

    Affix the connection nozzles and any accessories you plan on using properly. Again, gas power washers put up a lot of pressure, and it’s not hard to imagine what will happen if a stream of water so compressed finds its way outside the spray gun.

    3. Determine a safe distance

    Even though most gas pressure washers are mobile, it would be best to start from an approximate, safe position and zone in on the object/area rather than to tow the washer from place to place. Note that gas-powered pressure washers can weigh well above 150 pounds.

    4. Start spraying

    If you’ve done everything correctly, nothing should go awry. Check the oil, check the connections, maintain a safe distance, and you’re free to start using your pressure washer.

     
     
    1Can I use my gas-powered pressure washer indoors?
    Although some gas pressure washers can be used to clean home interiors, we highly advise against it. Namely, one of the biggest differences between gas and electric-powered power washers is that the latter was meant for indoor use while the former was meant for outdoor use.

    Simply put, gas-powered pressure washer pack more PSI, which basically means that the water jets sprayed from these washers shoot out with increased pressure. In fact, the pressure gas-powered washer models emit is so high that you’ll most likely end up damaging or even completely destroying your home interior.

    Even those gas pressure washers with the lowest PSI rating are still several times stronger than most electric-powered ones with top PSI ratings.
    2What is the best way to store my gas pressure washer?
    Gas-powered pressure washers are generally bigger than electric-powered ones. This means that you’ll need to make some space for storage beforehand. The storage process varies from model to model mainly because each power washer sports a different kind of design.

    For example, there are smaller gas-powered pressure washers that could fit inside any smaller shed, such as for example is NorthStar’s gas pressure washer. Power washers that are more compact in nature demand less in terms of storage space.

    Bulkier models often come supplied with a ton of features, so you should clear up a good portion of a room you’ve designated for its storage. The biggest models that are the toughest to store are best kept in a garage or bigger sheds. Most power washers come supplied with parts that are prone to corrosion and rust, so even though damp places might not ‘hurt’ them, you should at least make sure that the area is not wet.
    3What is the average space that should be given from the nozzle to the surface?
    This always depends on which type of surface you are spraying. Sidewalks and other tough surfaces can withstand quite a bit of PSI, and the industry-standard is approximately 6 inches.

    The quantity of dirt and grime on the surface is the second factor you should take into consideration. Obviously, gas-powered pressure washers are incredibly strong, so you should find the right balance between cleaning the dirt fast and avoiding splashing the dirt in your face due to sheer pressure.

    If you are cleaning the walls of your home, you should be at least five feet away, just to be safe. You can start closing in at a slow pace if everything goes well, and stop right at the point where you are still removing the dirt and not scrubbing off the paint.
    4Can I leave fuel in the gas tank for long periods of time?
    Simply put, you should not leave the fuel for more than a couple of weeks. Even though top-quality pressure washers feature a strong sealing mechanism, fuel can leak from the reservoir even still.

    The fuel can ‘go bad’ or ‘get spoiled’ but it is volatile and will change its properties if simply left unchecked.

    Fuel usually loses its initial properties after a mere 30 days if you don’t use any appropriate accessories to keep it stable. This time span is significantly shorter during colder winter seasons. Gas is prone to oxidation, and it can start building up deposits of varnish; these layers of ‘bad’ gas can clog your gas canister and make the maintenance process significantly harder.

    To properly address this issue, you should use oil/gas stabilizers if you want to prolong the longevity of the gas inside the tank. Otherwise, we recommend draining the entire tank after three to four weeks.
    5What type of oil should be used in the pump?
    Typically, people use either non-detergent pump oil or small engine oil for contraptions such as vehicles or power washers. However, there are people that aren’t aware of the fact that detergent oil can do much harm if it doesn’t pass through a designated oil filter.

    This is one of the many reasons why people usually opt for non-detergent oils. However, non-detergent oil is ‘heavy’ for most pumps (with the exceptions of non-marring ones), and it substantially increases the quantity of wear.

    Small engine oil is a good alternative, although it’s not nearly as efficient as non-detergent (and detergent pump oil).
     
    Conclusion
    At the end of the day, it’s up to you to decide which model is the best value gas pressure washer. We’ve compiled a top 10 list of the best rated gas pressure washer models for your convenience, so feel free to browse as much as you like.

    Before you start searching for the best gas powered pressure washer, we recommend that you consult the buying guide for additional information on the criteria we’ve used during the evaluation of each model.