Generac Vs Simpson Pressure Washer

Generac Vs Simpson Pressure Washer [2020 Guide]

Let’s start the comparison Generac Vs Simpson. Which company is best in terms of making pressure washers. We will cover each and every aspect of Generac & Simpson below.

A pressure washer or speed washers! You can take it as a machine that capability to cleans almost everything, likewise a car, greasy floor, or outdoor grills much faster than any other solution.

Types of Pressure Washer

Pressure washer, itself a great innovation and modified form of cleaning machine. It looks like a motor engine. However, any device available by different categories and factors but mainly, it’s a classification by fuel or ignition system has two types:

  • Electric pressure washers
  • Gas pressure washers

The invention of Pressure Washer

Speed/Pressure washers concept was developed in 1926 by Frank W Ofeldt II, who claims he develops hot water steam- high-pressure washer. Later on, the Popularity of concept grown and numerous developed occurs in the second half of the 20th century.

By the passage of time, manufacturers dreamed of power ignition electric or gas pressure washer machines.

Inventors and companies drag in it and develop pressure washer more work and energy-efficient and compatible with their use. Companies announce a lot of different models respective to their use, rider age, environment, and features.

Where this invention looks decent, it has some drawbacks and pros too. Stay with us. We come here for you after colossal research and share our experience with you by reviewing top models their pros and cons, features, suitability, and budget according to your needs.

We recommend these models to you after our decades of experience in this industry.

Generac Speedwash7122 vs Simpson msh3125-s

FeatureGenerac SP-7122Simpson msh3125
DimensionsL24.2”, W18.9”, H35.5”L 26”, W18”, H35”
Gallon per minute2.7GPM2.5GPM
Pounds per square inch3200PSI3100PSI
EngineGenerac ohv 196ccHONDA GC 190
PumpAxial cam pump with brass headOEM Technologies axial
Nozzles4-Quick Nozzle (0,15,25, soap)5-Quick Connect (0, 15, 25, 40)
WheelNever-flat wheel10” Pneumatic
Design & weight62lb55lb, Compact design

Generac 7122 Speed wash 3200PSI

Still, you are looking for an excellent self-control best gas speed washer for home use?

Generac speed wash 7122,  produce high-quality products that come with 3200PSI and 2.7GPM output. It is perfectly designed for a quicker and efficient cleaner. Generac speed wash 7122 washer claims that their product can clean up more rapidly than other cleaning machines in the same market value.


  • There is a turbo nozzle for nasty stains, greasy specks of dirt, and a far soap cluster blasting — moreover, the general speed washer 7122 equipped with power kinetics.
  • You can clean anything i.e., car, soap, wood, and concrete, by adjusting four different pressure levels according to the task.
  • Most durable machines and comes with a non-marring and kink resistant high-pressure hose.
  • This machine is well worth the money. Started right up with just a couple pulls. The best features are the adjustable pressure knob on the wand.
  • The only negative point is I wish they would make one with a foot stirrup to hold the machine when you are pulling the starting cord.
  • Everything is coming off at ease! With that extra cleaning attachment, they give you that rotates in circles; it cuts down the time by a lot!
  • The engine starts on one pull. 2 pulls if you use the gas shut off valve. The hose it comes with is excellent and doesn’t kink. The gun is very light and comfortable to use.
  •  The only downfall I would say is the hose connection to the pressure washer. With big hands, it’s tough to detach the hose from the machine.
  • Officially authorized Generac speed wash 7122 washer has a 196cc OHV engine delivers maximum cleaning performance.
  • Its gas engine pump delivers a max speed of 2.7 gallons per minute with 3200 PSI compression. Speed pressure washer for a home goes up for up to 30 feet reinforce hose.
  • The pressure washer has four nozzle modes for “normal” “intermediate” and “High performance”.
  • Furthermore, an active balancing feature allows you to carry it individually
  • Last up! It’s non-flat rubber wheels; non-slip pads give you a smooth effortlessly ride through mud, gravel, or even in all-terrain. I would want to say; this is a great gas speed washer.

Generac Speed Wash 7122 3200 PSI 2.7 GPM 196cc Gas Powered Pressure Washer

Pros & Cons

  • Collapsible
  • Lots of attachments (highly flexible hose, quick-change nozzles)
  • Easy to start
  • Power settings on wand
  • Durable axial pump
  • Separate detergent tank
  • Manufacturer warranty
  • Compact design
  • Non-slip & Shock-absorbing wheels
  • Lack of throttle to control pressure
  • Plastic parts, like wand holster, are flimsy, and poorly secured
  • Not as powerful as other similar PSI models
  • Short hose
  • High price tag
  • With a lot of pressure, enough flow rate 2.7gallon/minute
  • Needs high maintenance after every 20hours of use
  • Less fuel-efficient

SIMPSON MSH3125-s Manual

SIMPSON MSH3125-s produces 3100PSI @ 2.5GPM, gives un-matchable cleansing abilities, you wouldn’t need to fix again in that area. Are you thinking of a big washing job? This is the best choice for you.

The short of it is the unit is easy to set up and use, starts easy (really, it’s just one pull) and has great cleaning power. The container of engine oil provided with the unit is just the right size, pour it all in the crankcase, add gas to the large fuel tank and you’re ready to go.

This Simpson unit has a horizontal engine shaft with the pump mounted in the rear where it’s easy to get at. Another big plus is that the metal frame on this unit completely surrounds the engine and protecting them from accidental damage. Units with the pumps on the bottom are susceptible to being damaged when pulling them upstairs or across rough terrain.

Simpson MSH3125-S is a gasoline-powered, performance-oriented washing ability to produce precision according to its use.


  • One of the first things that attracted me to the Honda engine. Honda is well known for its small engine reliability
  • All the other high PSI units costing about the same as this unit had plastic bumpers and plastic hose and spray wand mounts.
  • This Simpson unit is all heavy-gauge metal that will hold up to abuse.
  • Simpson msh3125-s unit has a horizontal engine shaft with the pump mounted in the rear where it’s easy to get at.
  • Another big plus is that the metal frame on this unit completely surrounds the engine and pump housing protecting them from accidental damage.
  • For more user protection and unit durability! Simpson msh3125 has the hose storage and pump in the back and the muffler upfront. The muffler also has a heat shield around it.
  • The majority of units had aluminum pump heads. This unit, like the larger more expensive units, has a brass pump head which will hold up much better than the aluminum units.

Simpson MSH3125 MegaShot Gas Pressure Washer

Pros & Cons

  • Easy to pull in all-terrain
  • Additional equipment
  • Five different spray tips
  • Compatible with available accessories on amazon
  • Quick connect nozzle various usage angle degrees
  • Durable
  • OEM axial technology- maintenance less
  • Premium 10.5” pneumatic wheels
  • Efficient fuel consumption
  • Compelling output @ 3200psi -2.5gpm
  • Excellent cleaning power
  • Heavy-duty steel frame
  • Larger soap container
  • Portable, indoor-outdoor uses
  • Cannot be easily fix
  • The vibration of the spray nozzle
  • Emit odious gas
  • Repairing cost
  • Leak oil during transport
  • Frequently add soap or less soap efficient
  • Bad after-sales customer service

Frequently Asked Questions

How pick the Best Gas pressure washer? 

Use the PSI and GPM ratings to determine the cleaning power of a Pressure washer. Higher ratings mean you can clean more area in less time.

What’s more important PSI or GPM?

Both are equally important. A correct combination of PSI and GPM to have an ideal pressure washing system for your needs.

How long you run gas pressure washer in a single-use?

Gas pressure engines typically design for 300 to 3000 hours of usage. But you can use up to 4-6 hours in once as its built-in quality

Why does my gas pressure washer cutting off?

The carburetor might be clogged. A clogged carburetor is caused by leaving fuel in the washer for a long period. Try it to clean.


We describe all the details of the best of the best two products in a pressure washer by all possible means and angles.

We share the best review and comparison. In the perception of our experience and according to Simpson msg3125-s manual VS Generac speedwash7122 review, both machines are more performance-oriented and having a lot of extra features. In some cases, Simpson msh3125 is much better than Generac speed wash. It has a compact design, is easy to use, carry, and non-oxidizing characteristics.

Probably you think that “it’s a random review or what these guys are talking about?”. We assure you, YES! We are sure what we are talking about and WHY:

A decade ago, we were staying where you right now. We had to clean, scrub of our surfaces, and we tired off. So we did a lot of research and found some top best of best gas pressure washer for home use.

Another beautiful thing is that the Simpson comes already assembled. Other than the typical set-up tasks like oil, fuel, etc. Pretty much all you need to do is turn the handle around and check the tires’ air pressure.

Finally, I like the fact that the Simpson is compatible with a variety of aftermarket accessories, and that original parts for it are readily available here on Amazon and at your local big-box hardware store.

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