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SIMPSON

Simpson PS4240 PowerShot Gas Pressure Washer Powered by Honda GX390, 4200 PSI at 4.0 GPM, (49 State) 60456

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Availability: Only 3 left in stock, order soon!
Fulfilled by e-Global Consulting
Arrives Nov 10 – Nov 16
Order within 23 hours and 18 minutes
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Style: 4200 PSI


Features

  • SIMPSON PRESSURE WASHER FOR PROFESSIONALS: The Simpson PowerShot gas power washer cleans decks, driveways, siding, fencing, equipment, and graffiti; The cold water machine is great for contractors; 49-State Compliant (Not for sale in California)
  • ENGINE & PUMP: Premium Honda GX390 engine starts easily and includes low-oil shutdown; Maintenance-free 4200 PSI 4.0 GPM AAA triplex plunger pump with an integrated unloader and thermal relief to prevent overheating; Designed for a long service life
  • LONG HOSE REACH: The Simpson Monster series 50' dual-braided high-pressure hose resists kinks and abrasion; Non-marring polyurethane jacket helps protect finished surfaces; Quick-connect fittings speed setup
  • EASY MOBILITY: 13" premium pneumatic tires roll smoothly over gravel, grass, and curbs; Balanced layout improves transport; The welded steel frame with powder-coated finish is easy to assemble and resists corrosion; 38" L x 23.5" W x 29" H; 136 lb.
  • PRO PRESSURE WASHER ACCESSORIES: Five quick-connect pressure washer tips (0, 15, 25, 40, and soap nozzle) cover tasks from stripping paint to car cleaning; Rear-load QC pressure washer gun and 31" spray wand included

Description

The SIMPSON Power Shot 4200 PSI at 4. 0 GPM is ideal for prosumers and professionals alike. This is a powerful option for deep outdoor cleaning, job site use, equipment upkeep and facility or fleet maintenance. This product is engineered to meet the demands of a cleaning professional. The PS4240 features a commercial HONDA GX390 engine, reliable AAA industrial triplex pump, 50-ft kink & abrasion resistant hose, ergonomic spray gun and 5 Quick-connect nozzles. Designed to meet the rigorous demands of the cleaning professional, the SIMPSON Power Shot Series frame is crafted of solid steel making it powerful, yet extremely compact, easy to transport, set-up and load. Perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal and all other professional cleaning services. The SIMPSON Power Shot Series designed for optimum performance in the harshest environments. 3 year limited HONDA commercial engine, 5 year limited pump, 10 year limited frame and 90 day accessory. From the Manufacturer The PowerShot is an extremely powerful direct drive machine. The PowerShot is “The Choice” for Contractors and Cleaning professionals who want direct drive simplicity and SIMPSON quality in one package. More pressure and more water flow result in even greater cleaning performance and faster job completion. Those who agree that “Time is Money” use the PowerShot! Warranty Details: Engine - 3 Year Limited Commercial Warranty | Pump - 5 Year Limited Warranty | Frame - 10 Year Limited Warranty

Brand: SIMPSON


Power Source: Gasoline


Color: Black


Item Weight: 141 pounds


Hose Length: 50 feet


Product Dimensions: 8"L x 3"W x 50"H


Tank Volume: 1.61 gallons


Maximum Flow Rate: 4 gpm


Global Trade Identification Number: 13


Maximum Pressure: 4200 psi


Brand Name: SIMPSON


Model Number: PS4240H-SP


Global Trade Identification Number: 13


UPC: 879399000713


Number of Items: 1


Unit Count: 1 Count


Manufacturer Warranty Description: 3 Year Limited Commercial Warranty | Pump - 5 Year Limited Warranty | Frame - 10 Year Limited Warranty


Included Components: Pressure Washer Powered by Honda GX390,


Item Type Name: Gas Pressure Washer Powered by HONDA GX390


Manufacturer: SIMPSON


Manufacturer Part Number: PS4240S


Item Weight: 141 pounds


Hose Length: 50 feet


Item Dimensions L x W x H: 8"L x 3"W x 50"H


Tank Volume: 1.61 gallons


Wand Length: 31 inches


Power Source: Gasoline


Maximum Flow Rate: 4 gpm


Maximum Pressure: 4200 psi


Color: Black


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Nov 10 – Nov 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • This thing is a monster
Style: 4200 PSI
The machine arrived in good condition. So far I have used it about 10 hours, so I cannot testify about the durability of the unit. However, I can say that this thing eats everything in its path. We just bought a home with a long drive way, a court yard, and a patio all that were covered in years of dirt. I killed a cheap Sears unit trying to get all the concrete clean. I decided the cost of this unit would be worth the price if it made the job easier, and it would last me a lifetime. I was very pleased with the results of this unit. I combined the unit with a 12” flat surface cleaner, and it must have cut my work time by 400%. I also bought an extra 50’ Monster hose. With the long hose I never had to move the unit. I also bought a pressure gage, which is very handy. I did some research after the unit arrived, and I was able to determine that it has a pump made by Comet. If you don’t know already, Comet makes some of the best pumps you can buy. Be advised, you better have a solid footing, and have a good hold of the wand when you pull the trigger, because it will push you back with a strong force. Because of that, it is a workout using this beast. Also, be very cautious with where you point it. I know it should go without saying but this thing can cause some damage, with the pressure it puts out. I got careless and just barely grazed by lower leg, and it pealed the skin off. So, be careful. So far, I can say that it has been well worth the money spent and would recommend this unit to anybody. Also, I spent hours of research on different models and pricing. Don’t waste your time. You will not find anything any better or a better price, that what Amazon has to offer. i am a long time Amazon customer and if they keep offering prices and delivery like I got on this unit, I will remain an Amazon customer. ... show more
Reviewed in the United States on August 14, 2013 by Robert E Tate
    • GOOD RELIABILITY
Style: 4200 PSI
VERY EASY TO USE. STARTS WELL. GOOD PRESSURE.
Reviewed in the United States on September 1, 2026 by stephen bibeau
    • Disappointed in Quality Control and Customer Support; Motor rubbing on tire
Style: 4200 PSI
Review Image by OhJohnnyRhodes
Review Image by OhJohnnyRhodes
Review Image by OhJohnnyRhodes
Review Image by OhJohnnyRhodes
Review Image by OhJohnnyRhodes
Disappointed in Quality Control and Customer Support EDIT: Amazon made right after contacting them several times. This was a problem on Simpson's end, and they never took any accountability. They were not only hard to get in contact with, but incredibly dismissive of my having an $1100 brick. This is a 1 star for Simpson, and I will never buy any product from them again. Amazon, thank you for dealing with this problem from... omg... it's like Homer Simpson hiding in the bushes. -end EDIT I bought the Simpson 4200 PSI / 4.0 GPM pressure washer and was excited to put it to work—until I realized the cart was rubbing on the motor right out of the box. Not exactly confidence-inspiring on a brand-new unit. There was no way to move the cart at all. This would have been noticed while putting the washer in the box, assembly, or any other step of the way. What other problems am I going to find with this? I reached out to Simpson expecting some accountability or a solution, but instead they just passed the buck and told me to take it up elsewhere. No real help, no interest in fixing the issue. "We just do Parts," the person on the phone told me. Well the parts didn't fit together! For a premium-priced machine, I expected a lot more from both the product and the support team. They told me to try and contact Amazon instead. Very rude person on the phone there as well. I am going to probably end up fixing this myself. You can see from the pictures they mounted the washer 2 inches too far to the left facing the front of the machine. It would be one thing if the manufacturer owned up to the mistake, but she couldn't wait to get me off the phone fast enough. I've never had worse service. I emailed several times with no answer as well. ... show more
Reviewed in the United States on April 14, 2025 by OhJohnnyRhodes
    • good fuel economy
Style: 4200 PSI
powerful and easy starting
Reviewed in the United States on August 27, 2026 by Robbie
    • OMG, why did I wait to get this?
Style: 4200 PSI
I have has a smaller electric unit (Westinghouse 2K), which I still love and will use a lot for smaller jobs. However I have a lot of hard surfaces on my property and, living in the Pacific NW with the rain, trees and shade means I also have a LOT of moss and other organic buildup to deal with. I have done a lot of research. I've purchased other pressure washers. I finally decided to make the investment in a commercial grade machine because I wasn't getting the results I wanted in any reasonable amount of time and my electric simply doesn't drive a surface cleaner. Manually wanding my driveway was taking days with the electric and that was just focusing on the most important areas. So, with some advice of a trusted friend who owns a rental company, I decided to take the plunge on something with enough pressure (4k PSI) and GPM (3.5 or more) to make a meaningful impact. All I can say is: Wow! In the first 3.5 hours of use, coupled with the Mekoh 18" surface cleaner, I was able to clean 3 times the amount of moss-coated (thick in many spots) surface compared to the surface cleaned in 3+ days manually wanding. I also have a sports court which needs love and will be my next tackle. The obvious concern I've had is not stripping off the paint, but still getting the surface clean. So I wanted something I could "back down". While the pump on the 4240 has a regulator, I actually purchased the Simpson pressure regulator and it seems to work quite well. I suppose I could use the pump regulator in tandem with the extra in-line Simpson regulator to really dial it in, but I'd prefer not to muck about with the pumps factory settings. To address some of the concerns I've seen in other reviews: the unit arrived in excellent condition obviously all new and delivered on time. The modest assembly of the draw bar and wand and hose caddy was a matter of two minutes, easy peasy. The Honda engine instructions and the Simpson quick start guide were easy to follow in terms of adding the oil, fuel and then start up. Start up was just as straightforwardas the manual said, and, as long as I was following those instructions [ahem], it started on the first pull every time. I did make a note that others had said it's helpful to pull the trigger when starting and so I did that (but not always, and even when I didn't, and I had the switches and throttles in the right position, it still started on the first pull). While I have only used it for a short time, there was absolutely no evidence of oil leaking or any of the other mechanical issues mentioned. If this changes over time, I'll come back and edit this review. Everything about the pressure washer is commercial/contractor grade. The Monster hose is just that - it seems like it will withstand anything but does take extra effort to maneuver. In all, the unit does require strength and some stamina to operate (because it's so strong) and you'll need a ramp or some help to get it into the back of a pickup. But if you compare it's effectiveness and the substantial reduction of time, I'd say overall that it takes much less effort to get amazing results than less powerful models. Bottom line: if you're tired of putting up with lesser units, and have the budget for this fantastic monster, I highly recommend it. ... show more
Reviewed in the United States on April 26, 2024 by Will Riffle
    • Excellent product - Best quality
Style: 4200 PSI
Excellent product - Best quality - Great product
Reviewed in the United States on August 28, 2026 by Shark201
    • Very powerful
Style: 4200 PSI
It's very powerful. Cleans cars, engines, etc very well. Also works well with pavement cleaner. The machine is very heavy, so moving it around is a chore. To be expected, I suppose. The pneumatic tires could roll better, it is improved with air pressure, but they dont hold air well between seasons or uses. After about 10 uses over two years or so, the pump is spraying oil, water out the vent when water is connected to the input, without even running the engine, oil/water coming out the oil fill on the top of the pump housing. Suspect a seal has failed. Since I've had the pressure washer for over a year, I thought I would have to eat the repair/cost. I called Simpson service, a nice human answered right away on Saturday morning and let me know that the warranty is 3yrs engine, 5yrs pump, I believe she said. Additionally, there is an authorized repair shop near enough to me, I can work with them. She gave me the contact info Elon and address. This info os also on Simpson's website. I'll have to call the shop on Monday to start the process with them. Hopefully I can drop it off next week. Anxious to see how the repair goes. Glad to know warranty is likely still in effect. Amazon is auth retailer, etc. It was refreshing to call a support number for a product, connect with an informed human, and get pointed in what seems like a good direction. Good job on that part Simpson! If the repair support continues to go well, you'll have a customer for life, here. ... show more
Reviewed in the United States on April 4, 2026 by Jessica Fisher
    • Adapter for washing tolls is broken. Please send me a new one
Style: 4200 PSI
The machine came perfect. The only issue is the adapter that connects with the tools to power wash the is broken. It went from round to oval. Please send 2 adapter so people who purchase the items don't suffer trying to find the exact fit for this machine. Its frustrating!! Everything else is fine
Reviewed in the United States on August 18, 2025 by Matine

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