Generac Vs Simpson Pressure Washer (In-depth Review)

generac vs simpson pressure washer

Over the past few decades, pressure washers have become increasingly popular. This is because they are powerful machines that can blast off old & tough stains in a matter of minutes.

Pressure washing beats the traditional method of a detergent & water hand scrub. It makes surface-cleaning tasks completed in a short while. 

There are many brands and models of pressure washers on the market but this article is a side by side comparison of Generac Vs Simpson pressure washers

Both brands are tested and trusted makers of pressure washers, however, you can’t buy them both. They perform the same functions but each has its unique features and capacities.

Using this detailed and unbiased review, you will be able to make up your mind regarding the brand and model that best suits your needs.

So, let’s get right into it.

Generac Pressure Washers Review

We’ll start with the Generac models.

1. Generac OneWash 3,100 PSI 70191 Pressure Washer

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One feature I’m sure you’ll love about this unit is the ergonomic spray gun with an integrated power dial.

With this, you can set the right pressure you need to handle as many as 4 different tasks. These include the car wash, concrete, wood, and soap. All at the tip of your fingers.

You don’t have to worry about tough stains as the horizontal axial cam pump is powerful enough to deliver as much as 3,100 PSI.

It also comes with an on-board 1/2 gallon detergent tank to make your cleaning tasks as easy as it can be.

For easy movement, the unit comes with 2 sturdy back tires, so you can conveniently roll it to and fro any cleaning site. These tires are fit to move across almost any surface

The handles are also quite comfy and you won’t have any trouble moving it about. If you’re a color lover, then I believe the orange and black finish will suit your taste.


  • 3,100 PSI
  • 24.2 x 18.9 x 35.5 inches
  • Weight 65 pounds
  • 196Ccc Generac OHV motor
  • Oversized never-flat tires
  • Easy access hose connections
  • Ergonomic spray gun with integrated power dial
  • Color – orange & black
  • Horizontal axial cam pump


  • It is easy to assemble
  • Starts easily
  • Never-flat tires for easy movement
  • Not too heavy
  • Easy handling
  • Fairly priced
  • Very easy hose connection


  • The axial cam pump is not sturdy enough

Related: Ryobi vs Generac Pressure Washer

2. Generac 6882 GPW 2900PSI Pressure Washer

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At 57 pounds, this unit is 10 pounds lighter than the model above. So, if you thought to move that around was easy, then you will find this a lot more convenient.

At 2,900 PSI, it is not as powerful as the General 70191 (above), but it also offers you effective cleaning power. With this, you can clean in half the time as other pressure washers in its range. So, it’s still a great buy.

It is designed with a turbo nozzle that handles stains 30% quicker and a soap blaster that blasts 3 times farther off than its peers. It also comes with 4 quick-connect nozzle tips (0 degrees, 25 degrees, 40 degrees, and soap).

The whole unit is powered by a Generac 196cc OHV motor that offers your money’s worth in terms of cleaning ability.


  • 2,900 PSI
  • 25 feet high-pressure hose
  • Oversized never-flat tires
  • Generac 196cc OHV motor
  • 4 quick-connect nozzle tips
  • Weight – 57 pounds
  • Orange and black color
  • 24.2 x 18.9 x 35.5 inches


  • Quick cleaning ability
  • It is lighter than the Generac 70191
  • Easy to assemble
  • Easy to start


  • The overall frame is not long-lasting

Simpson Pressure Washers Review

Now let’s take a look at some of Simpson’s models.

1. SIMPSON Cleaning PS4240 PowerShot Gas Pressure Washer

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When you talk about a powerful pressure washer, there are only a few you can find better than this. Thanks to the Honda GX390 motor, you can easily handle as many stubborn stains as you can find on surfaces.

It can be used for both home and commercial use kudos to its powerful cleaning ability.

It has a built-in oil alert that keeps you updated with oil levels. This lets you know when your unit is running low and needs a change or refill.

The pump does a great job of delivering blasts. It’s an AAA industrial triplex plunger pump made with power boost technology, so you’re assured of a powerful flow.

As for reach, you’ll be getting a 3/8 inch X 50 feet monster hose that allows you to access surfaces that are far away from the washer. The hose is also kink and abrasion-resistant, so it’ll look as good as new even after years of use.


  • 4,200 PSI
  • 4.0 GPM
  • Welded steel frame
  • 13″ Premium pneumatic wheels
  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40°, and soap
  • HONDA GX390 engine w/ Oil Alert
  • Weight – 141 pounds


  • It is sturdily built
  • Maximum cleaning power
  • Easy to use
  • 50 feet hose for better reach


  • Even though the wheels make it easy to move, its 141 pounds weight is still challenging

2. SIMPSON Cleaning ALH3425 Aluminum Gas Pressure Washer

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Not as powerful as the 4,200 PSI model, but this unit delivers a hard blast all the same. It can tackle pretty

much the same level of cleaning tasks as the former.

It has a powerful GX200 Honda engine that makes sure the whole unit is operating at maximum capacity to give you a convenient cleaning experience. The AAA industrial triplex plunger pump also ensures you get a powerful blast during operation.

The hose is not up to 50 feet long as the former but the 35 feet length still provides a very good reach. It’s also non-marring and abrasion-resistant; this should offer you some consolation.

You will love the sturdy aircraft-grade aluminum structure that guarantees your unit will be in tip-top physical shape for years to come.

There’s more good news for you; it weighs just 80 pounds. Add that to the wide never-flat tires and you will find this unit fairly easy to move around the cleaning areas.

That being said, if you’re looking for a smaller & fairly weighted Simpson pressure washer with a solid build, you might want to give this a try.


  • 3,600 PSI
  • 2.5 GPM
  • GX200 Honda Engine
  • Threaded fitting non-marring kink/abrasion-resistant hose
  • Aircraft-grade aluminum frame
  • 10″ Premium pneumatic wheels
  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40°, and soap
  • Weight – 80 pounds
  • 30 x 24 x 21 inches
  • Color – red and black


  • At 80 pounds, it is fairly weighted
  • Powerful cleaning ability
  • For its size, a 35 feet high-pressure hose gives you good reach
  • Sturdily built


  • Starting it is a bit difficult

Related: Ryobi vs Simpson Pressure Washers

3. SIMPSON Cleaning PS3228 PowerShot Gas Pressure Washer

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With a cleaning power of 3,300 PSI and 2.5 GPM, as well as a reliable Honda GX200 engine, you can’t go wrong with this pressure washer. It doesn’t stop there, the engine comes with years of warranty, so you’re certain that your investment is safe.

The AAA industrial triplex plunger pump with power boost technology guarantees that you’ll have an adequate outflow of water. It is also designed with a pump bypass mode to secure your pump.

You’ll be getting a decent amount of reach with the 25 feet MorFlex non-marring hose, so you can access wider surface areas. The hose is also designed with threaded fittings for better sturdiness.

Speaking of sturdiness, the welded steel frame will provide your unit with all the stability it needs when in use. This machine is so sturdy that you’ll only experience minimal vibration during cleaning.

Most pressure washer users are particular about movement, which is why the 10-inch premium pneumatic wheels are great. With these, you can easily move this unit to and fro the cleaning site as well as load it onto a vehicle if need be.


  • 3,300 PSI
  • 2.5 GPM
  • Welded steel construction frame
  • 10″ premium pneumatic wheels
  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40°, and soap
  • 25 feet high-pressure hose
  • Weight – 83.2 pounds
  • Color – black
  • Honda GX200 engine


  • Easy to transport and load
  • It has a solid welded steel frame
  • 25 feet hose is great for its size
  • Easy to assemble


  • The oil pump is fragile

4. Simpson Cleaning MSH3125 MegaShot Gas Pressure Washer

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The engine of this unit has a different capacity from the other units mentioned above. It is powered by a GC190 premium Honda engine, which also does well in cleaning old tough stains.

This is a 3,200 PSI & 2.5 GPM pressure washer built with a maintenance-free OEM technologies axial cam pump. Be warned that you have to keep the fuel level at 1/2 inch (12.7 mm) beneath the bottom of the filler neck as this will help you to avoid any overflow.

As for the overall frame, you’ll have nothing to worry about because it is made with a welded steel construction. You can trust that this unit, just like most Simpson pressure washers, will remain stable for a good number of years.

Cleaning from one part of the decking to the siding and car won’t be much of a hassle thanks to its 12” never-flat tires that permit easy transportation. Also, getting it around is be a breeze since it’s just 65 pounds heavy.


  • 3,200 PSI
  • 2.5 GPM
  • 10” Premium pneumatic wheels
  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40°, and soap
  • Weight – 65 pounds
  • 25 feet high-pressure hose
  • GC190 premium Honda engine
  • Maintenance-free OEM Technologies axial cam pump
  • Color – black
  • 12” never-flat tires


  • It is lightweight
  • Easy to assemble and operate
  • Long-lasting frame
  • Quick cleaning ability


  • High vibration levels

Related: Simpson vs Craftsman Pressure Washers

5. SIMPSON Cleaning MS60763-S MegaShot Gas Pressure Washer

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This is the only Simpson pressure washer on this list that isn’t powered by a Honda engine. The unit comes with an equally powerful Kohler RH265 engine that provides the mechanism the washer needs to do its job.

It delivers 3,100 PSI at 2.5 GPM and is one of the best pressure washers in its class.

With this unit, you’ll get a maintenance-free OEM technologies axial cam pump for high performing output. The 1/4 inch x 25 feet MorFlex hose that gives you a decent reach is also kink and abrasion-resistant.

Typical of Simpson pressure washers, this unit has a non-disappointing solid steel construction.

Wide never-flat tires are always welcome because they can maneuver on most surfaces and make transportation a lot easier. Weighing just 63 pounds, the wheels are well complimented in terms of hassle-free movement.

This is a budget-friendly option that costs a lot less than most Simpson models.


  • 3,100 PSI
  • 2.5 GPM
  • Steel construction frame
  • 5 Quick connect nozzle tips: 0°, 15°, 25°, 40°, and soap
  • Weight – 63 pounds
  • 1/4 inch x 25 feet MorFlex hose
  • Kohler RH265 engine
  • 25 feet MorFlex non-marring hose
  • Maintenance-free OEM Technologies axial cam pump


  • It is fairly priced
  • It is lightweight
  • Easy to assemble
  • It is compact for easy storage
  • Easy to maneuver thanks to its compact size and wheels


  • The Kohler engine is not as easy to start as the models with Honda engines
  • Not the best for commercial use


So what do you think, which pressure washer takes your vote? Let me help you make that decision.

The Generac models reviewed here have a lower PSI than most of the Simpson models. The Simpson Cleaning PS4240 PowerShot gas pressure washer, for instance, tops the list with a PSI of 4,200 and a GPM of 4.0.

This isn’t to say that the Generac models aren’t great. But they are just better suited for smaller cleaning tasks.

Consider the level of cleaning you’ll be needing the pressure washers for before you buy. I’m sure one of the models reviewed above will meet your needs.


Generac Vs Simpson Pressure Washer (In-depth Review)
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