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SIMPSON

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

  • Based on 633 reviews
Condition: New
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Arrives Monday, Apr 27
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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 Gallons Per Minute


Global Trade Identification Number: 13


Maximum Pressure: 4200 Pound per Square Inch


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 Gallons Per Minute


Maximum Pressure: 4200 Pound per Square Inch


Color: Black


Brand Name: SIMPSON


Model Number: PS4240H-SP


Global Trade Identification Number: 13


UPC: 879399000713


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


Manufacturer Part Number: PS4240S


Included Components: Pressure Washer Powered by Honda GX390,


Unit Count: 1.0 Count


Item Type Name: Gas Pressure Washer Powered by HONDA GX390


Manufacturer: SIMPSON


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 27

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • 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
    • Easy starting and Setup
Style: 3500 PSI
Easy setup and light weight with plenty of power. Once delivered I had it out of the box and was using it in 30 minutes. Washed the driveway, side walk and mower. Seems to be real good quality and good value. Note to start off with the wider angle nozzles or you can damage some surfaces... It has a lot of power. ... show more
Reviewed in the United States on March 30, 2026 by Charles I. Burns
    • 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
    • The Best I've Ever Owned...You Won't Go Wrong With this Pressure Washer
Style: 4000 PSI
This is a fabulous pressure washer....best one I have ever owned. Easy assembly, immediate start on the first pull and love that Simpson chose a Hond engine. I would say that the job of power washing a very latge courtyard driveway area and side yard basketball court took HALF the time it took with my old 3200 PSI and this unit produced better results. I can confiently say that you won't go wrong if ypou are considering purchasing a pressure washer that is truly commercial grade. RJP Naples, Florida ... show more
Reviewed in the United States on March 28, 2026 by R. Poirier
    • Great product plagued by poor packaging and shipping.
Style: 4400 PSI
This is a great product. I read all the negative reviews and decided they came down to shipping damage in some cases and misuse in others. So I expected shipping damage and that's what I got, plus a missing hitch pin clip caused a wheel to come off. I knew Amazon would take care of it and they did, but I had to install the replacement parts myself. This is a serious and very powerful pressure washer so if you didn't know how to change out simple mechanical parts you might not really want this size of pressure washer either. Now as.to why they arrive damaged... Poor packaging by the manufacturer and absolutely no arrows on the box indicating right side up. The box was on its side in the Amazon truck and then the guys dropped it on my garage floor upside down. So the muffler heat shield was bent. Otherwise it works fine and I like it but it's overkill for my use around the house and car washing. The one annoying thing is that it absolutely will not start unless you are pulling the trigger on the spray wand while also pulling the starter cord. Otherwise the pump pressure builds up so fast that the engine can never get going. I think that's some sort of design flaw. ... show more
Reviewed in the United States on September 19, 2025 by RalphP
    • Handy dandy pressure washer
Style: 4400 PSI
This is a great pressure washer that fits the bill to do everything. I've had it for 4 years and it still works like new. Just stay on top of maintenance!!! and use ethanol free gas and it will take care of you.
Reviewed in the United States on April 11, 2026 by Anon5237

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