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Simpson Cleaning ALH4240 Aluminum Series 4200 PSI Gas Pressure Washer, 4.0 GPM, HONDA GX390 Engine, Includes Spray Gun and Extension Wand, 5 QC Nozzle Tips, 3/8-inch x 50-foot Monster Hose, (49 State)

  • Based on 1,387 reviews
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Availability: In Stock.
Fulfilled by Xsite Sales Store

Arrives Apr 9 – Apr 11
Order within 27 minutes
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Style: 4200 PSI 4.0 GPM


Features

  • Price For: Each Pressure Washer Flow Rate: 4 gpm Item: Pressure Washer Pressure Washer Duty Rating: Industrial Duty Power Type: Gas Detergent Injection System: Yes Pressure Washer Water Type: Cold Engine Brand: Honda Operating Pressure: 4200 psi Pressure Washer Style: Cart Duty Rating: Industrial Duty Operating Pressure (PSI): 4200 psi
  • Country of Origin (subject to change): United States

Description

The SIMPSON Aluminum Series pressure washer 4200 PSI at 4. 0 GPM is great for construction, equipment upkeep, and facility and fleet maintenance cleaning. With a powerful HONDA GX390 engine, reliable CAT triplex pump, and ultra lightweight aircraft grade aluminum frame, this pressure washer is the optimum blend of maneuverability and performance. The ALH4240 also comes with a 50’ hose, ergonomic spray gun, and 5 Quick Connect nozzles. Designed to meet the rigorous demands of the cleaning professional, the SIMPSON Aluminum Series frame is crafted of 100% aircraft grade aluminum, making it lighter in weight than most steel frame pressure washer designs. Perfect for contractors who specialize in deck cleaning, wood restoration, paint preparation, graffiti removal and all other professional cleaning services. The SIMPSON Aluminum Series designed for optimum performance in the harshest environments. 10 Year Limited Frame Warranty, 5 Year Limited Pump Warranty, 3 Year Limited Engine Warranty. Includes: Pressure Washer, Hose, Gun, Wand, 5 Quick connect nozzle tips, Detergent siphon tube with filter, Engine Oil, Quick start set up guide, Owner's manual.

Brand: SIMPSON


Power Source: Gasoline


Color: Red


Maximum Pressure: 4200 Pound per Square Inch


Item Weight: 124 Pounds


Hose Length: 50 Inches


Product Dimensions: 38"L x 23.5"W x 29"H


Tank Volume: 2.5 Gallons


Maximum Flow Rate: 4 Gallons Per Minute


Brand: SIMPSON


Power Source: Gasoline


Color: Red


Maximum Pressure: 4200 Pound per Square Inch


Item Weight: 124 Pounds


Hose Length: 50 Inches


Product Dimensions: 38"L x 23.5"W x 29"H


Tank Volume: 2.5 Gallons


Maximum Flow Rate: 4 Gallons Per Minute


Item Weight: 124 pounds


Manufacturer: SIMPSON


Item model number: ALH4240


Is Discontinued By Manufacturer: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 9 – Apr 11

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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Top Amazon Reviews


  • Excellent pressure washer, Amazon service and delivery was 5 star!
Style: 3400 PSI Pressure Washer
Researched a new pressure washer for weeks. I looked at all sorts of online suppliers and Amazon had exactly the model with the engine I was looking at that matched my requirements. Delivery was fast, the pressure washer was in perfect condition and once I got the oil into the engine and gassed it up, the engine started on the first pull. The engine is shipped without oil but oil is included. The hydraulic pump has oil in it but be SURE to remove the small black plug from the center of the red hydraulic pump cover or you can damage the pump. I did have one issue on arrival that has been reported by other Amazon customers. See the photo of the wheel with the arrow pointing at the retainer clip. That clip came off almost instantly. I removed the axle and both wheels and used a triangular file to cut the notch in the axle a bit deeper on both sides to hold the retainer clip. Sloppy manufacturing on the part of Simpson. I’ve used a very similar but smaller version of this Simpson pressure washer for decades. Honda engine is the only way to go and the Cat pump has seal rebuild kits. The 5 pressure tips included cover most situations and pay attention to using the right tip for the right job. The 3400 psi model is ideal for most homeowner purposes including siding, concrete, and patio cleanup. NEVER point the water stream at skin, other people or animals. A 3400 psi water jet up close can cause severe tissue and damage skin in an instant. Wear work shoes with safety toes and eye protection. As a long time owner of machine exactly like this one there are a few things owners need to do to ensure quick starts and trouble free service. I read many low star reviews focused on hard starting. It’s not the machine, it’s the owner and their failure to follow some simple maintenance rules. This is key - ALWAYS run the fuel out of the carb when you’re done even if the machine will only sit for a few days. Use ethanol free gas with fuel stabilizer. Failure to use stabilizer and run the carb dry will cause 90% of hard starting problems. Change the engine oil and the hydraulic pump oil more often than required and use the proper oils. Check the air filter and the fluids regularly. I really like Simpson machines with Honda engines. I’ve had tremendous longevity and cleaning outcomes from these machines and I highly recommend them. ... show more
Reviewed in the United States on February 12, 2024 by Rolidnot Rolidnot

  • 5 Star Performance, Zero Star Packaging
Style: 4200 PSI 4.0 GPM
This is my first pressure washer and I wanted to get a good one. Sure, I could save some coin buying a lesser unit, but I didn't want to spend all weekend cleaning my driveway and patio. I'm glad I got the big one. Mine was slightly damaged during shipping; more on that later. After adding the included oil and filling the tank with fresh gasoline, I fed the pump some hose water and pulled the recoil starter. It fired right up, as a Honda should! I started off with the rotary head (rated for 4.0 GPM) and it immediately began to clear the scum from my driveway. The engine is well muffled for such a large displacement, by the way. The 50 foot hose is adequate for most residential needs, but adding a 100 footer to the accessories pile would help for cleaning off rockeries and brickwork around the backyard. This is the Evergreen State after all and moss is EVERYWHERE! Moss has met it's match with this unit, but I digress.. The 4500 PSI rated hose is of a 3/8" size, and it's burly but not too unwieldy; there is a price for power. I found the hose needs a bit of attention to deliberately lay out according to your intended cleaning path because loops and twists are not easily handled without setting down the wand, walking back to the problem and uncoiling it manually. Again, it's par for the course here. The big Honda 390 pushes 4 gallons per minute with serious authority; it's easy to get cavalier with the wand but care must be used when getting close to wood as it will tear it up in no time flat, especially with a turbo head. Reducing the pressure and flow with the regulator on the wand proved invaluable around delicate structures and planter areas; I can't imagine using this machine without it. I really love the aluminum base and frame. It's nice to know that it will never rust and weight has been kept to a minimum. As for the CAT pump, what's not to like? Industrial duty and rebuildable, it's the best money can buy. And when it comes to pressure washers, it's really all about the pump. I can also say that if your plans for a pressure washer consist primarily of auto or boat washing, this unit is overkill extreme. An electric Karcher or similar machine would be much better suited to you. If you value your time as much as your money and want to spend more of it enjoying your property then cleaning it, this is the one to get! Now about the damage. The courier that delivered the box to my house had noted that they received it with the cardboard already torn and plastic shipping wrap bandaging up the sad sight. A brief inspection didn't show anything wrong, but as soon as the courier left, I noticed the frame had gotten bent and the handle wouldn't slide on. I decided to just bend the post back in place enough to slide the handle on and live with it. Thankfully the engine proper didn't sustain any blows. I've given the unit 5 stars because I think it deserves it, but Simpson has got to do something about their packaging. It's totally inappropriate to ship a 1300 dollar 125 pound machine in a 2 dollar single corrugated cardboard box. The machine was essentially swimming in a paper sack by the time it made it to my driveway. The wand and tube were simply dropped in the box without any extra protection and the fact that they weren't damaged or missing is nothing short of a miracle. In summary, I would say that if you order one of these, you're rolling the dice when it comes to damage. Be prepared to refuse the shipment or hassle with aftermath from a significant impact. ... show more
Reviewed in the United States on June 18, 2017 by Sam Vert Sam Vert

  • Excellent pressure washer to get started with.
Style: 3400 PSI Pressure Washer
Excellent machine to get started with, making some extra money.14" surface cleaner works well with this 2.5 gpm machine. Do a few jobs then upgrade to a belt drive or gear drive 4 gpm machine. Unless you have to funds to purchase a 4 gpm right off the bat ,with a 16" surface cleaner..Make sure you're down streaming with 10% or 12% sodium hypochlorite from your local pool supply. No need to water it down with this machine imo. Let it soak for 5 to 10 mins and blow it off. Let the bleach do the work. If you are pressure washing/soft washing without SH , you are doing it wrong. I found that out real quick... Make sure you change the engine oil (w/10w30 or 15w40) and pump oil (cat pump oil) after about 50 hours.It will last years. ... show more
Reviewed in the United States on January 7, 2024 by John

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