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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 3,273 reviews
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Availability: In Stock.
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Arrives Wednesday, Aug 6
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Style: 4200 PSI


Features

  • Professional Performance: Easy-to-assemble and easy-to-start with its Honda GX390 premium engine, the PowerShot power washer is great for contractors who specialize in deck cleaning, wood restoration, paint preparation, and all other professional services.PowerBoost: Yes
  • Power and Durability: A powerful, reliable, maintenance-free AAA industrial triplex plunger pump delivers 4200 PSI at 4.0 GPM and includes thermal relief to prevent overheating
  • Sturdy and Portable: The welded steel frame construction with powder coated finish offers durability and corrosion resistance; 13-inch premium pneumatic tires deliver ease of maneuverability across various terrain and uneven ground
  • Includes Quality Accessories: Monster 3/8" x 50' high-pressure hose is kink and abrasion resistant hose with quick connect fittings and polyurethane outer jacket; 5 Quick connect nozzle tips: 0, 15, 25, 40 and Soap; Ergonomic spray gun 31" steel wand
  • Important Notes: 49-state compliant; Keep max fuel level 1/2 Inch below bottom of filler neck to avoid spillage

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. Heavy duty welded steel construction with steel axle frame

Brand: SIMPSON


Power Source: Gasoline


Color: Black


Maximum Pressure: 4200 Pound per Square Inch


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


Brand: SIMPSON


Power Source: Gasoline


Color: Black


Maximum Pressure: 4200 Pound per Square Inch


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


UPC: 879399000713


Item Weight: 141 pounds


Manufacturer: SIMPSON


Country of Origin: USA


Item model number: PS4240H-SP


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 6

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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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
    • Perfect product.
Style: 4400 PSI
Review Image by Nicholas M. Nicholas M.
This Simpson 4.0 GPM 4,400 PSI pressure washer is great! I've used this for my company and it the best purchase I've ever made. Gives great pressure, and is very easy to move around. Fits my hose great with the quick connects. Amazing deal for the price.
Reviewed in the United States on July 23, 2025 by Nicholas M. Nicholas M.
    • Save your money - don’t buy Simpson
Style: 3300 PSI Honda GX200
Review Image by Matt horgan Matt horgan
Review Image by Matt horgan Matt horgan
Have written and updated this four times now and still not showing up in reviews for some reason. Last attempt. I originally posted some comments and described the failure of my machine; withholding full review unit seeing how Simpson supports their products. Now I’m documenting the answer to that… Here is how Simpson pitches this machine: “ The SIMPSON® PowerShot™ Series is designed to meet the rigorous demands of the cleaning pro. Heavy-duty pressure washers with flow and reliability.” They go on to say how this is a great tool for contractors. And this is why I bought this model - though I’m only using it around my home, I wanted a product designed to provide long lasting performance, reliability and durability. Well, friends - this isn’t it. After only two years my pressure washer pump has failed; it has water leaking into the pump oil and Simpson Customer Service informed me it’s caused by a leaking seal or piston issue - and these are wear items so they won’t cover it. The rigorous demands of the cleaning pro is interpreted to mean wearing out after two years is acceptable. I’m a mechanical engineer and worked for 30 years in the HD diesel engine industry so I am familiar with mechanical products, duty cycles and wear. This product failing at two years is “premature wear” especially in light of the relatively light duty cycle it’s experienced. Contractors could not afford to spend money on a product that fails in two years. So if you’re considering a purchase I recommend you save some money and opt for one of the many lower priced options available. I’ve been using a good number of tools from Harbor Freight as of late with good results. Lower priced and performing well —————————————————————— Original post: I bought this two years ago and it’s performed well, but yesterday I looked at the sight glass to check pump oil and couldn’t see anything; the glass looked white. So this morning I drained the pump oil and it came out milky white as shown. My understanding is this means water has gotten into the pump mechanism and based on the color and froth - especially after sitting overnight - I don’t think this could be from a little internal condensation, but from a bad seal in the pump. I imagine this would quickly cause damage to the pump, too, so assume warranty service is at minimum a complete rebuild or replacement of pump. I’ve drained and replaced the oil before and it was fine. I emailed customer support this morning on how to obtain warranty service as this should have a 5-year warranty on the pump. I will revisit review after seeing how they respond. Coincidentally - this afternoon I am due to receive a new pump for my old Excell pressure washer with Honda engine. Engine is still fine and pump gave out after more than a decade. And it was an oil-less pump so never had to service it. So by tomorrow sometime I should have that one back up and running with an upgraded pump. ... show more
Reviewed in the United States on July 2, 2024 by Matt horgan Matt horgan
    • Great quality product. Works better than expected.
Style: 3300 PSI Honda GX200
Tried two other gasoline power washers from another brand from a big box store. Both malfunctioned within an hour of starting them. Both were returned. This Simpson is a horse. Started on the second pull of the starter rope and runs like a dream. Very smooth operation. Honda engine technology and attention to detail are worth the price here. The pump works great. Variable pressure available via the large knob on the top of the pump. Have used it around the house several times. Each time the engine starts on the first pull. It makes pressure immediately and provides enough pressure to really clean the concrete driveway or whatever else you intend to clean. It does make more pressure than most garden variety electric pressure washers, so beware. If you've had a plug in electric model in the past, this one will make considerably more pressure than most if not all of those. Overall we are very pleased with this purchase, pleased with the Honda engine and the Simpson brand overall. Highly recommended. ... show more
Reviewed in the United States on October 25, 2024 by Amazon Customer

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