Simpson Aluminum Series 4200 PSI Gas Pressure Washer, 2.5 GPM, Honda GX390 | Gas Power Washer For Professionals. CAT Triplex Pump, 50' Hose, Aluminum Frame, 5 Nozzles. 49-State Compliant. ALH4240

My unit arrived in absolutely perfect condition, secured to a small pallet and delivered by R&L Carriers. Assembly was straightforward and only required that the handle be attached using the provided hardware. After reading other reviews, I took a few minutes to check nuts and bolts on the frame and did find some that needed to be tightened a bit. I took special care not to over tighten anything since the frame is made of aluminum. The engine mounting bolts were all secure and didn’t require any additional adjustment. I poured in the supplied quart of AMSOIL, removed the vent plug from the pump as described in the manual and added fuel. This unit is the real deal! After a 30 minute washing session of my block retaining wall at medium throttle, I shut the unit down and gave a quick visual inspection of the engine and pump to check for leaks or anything abnormal. I then connected my neighbors commercial surface washer and cleaned my driveway and sidewalk. This unit supplied more than enough pressure and GPM to get the job done. The supplied 50’ hose is fairly stiff as reviews have stated but I’m sure it’s extremely durable. I will likely purchase a 100’ hose like I used with the surface washer in the future. I highly recommend this unit for anyone who needs more than just the “average” pressure washer. I was tired of being disappointed with my old washer.

This power washer is amazing. It does the work in half the time that it took our old power washer to do. Super powerful and the aluminum frame makes it lighter and easier to maneuver. The Honda engine is a beast and the CAT pump is the way to go for longevity. Assembly was easy and it came with the attachments to start working immediately. Highly recommended.

I read the negative reviews that described damage during shipment attributed to inadequate packaging with some trepidation, but based on the number of positive reviews and my certainty that the equipment in and of itself was first class I chose to place the order. I never suspected that anyone would ship a thirteen-hundred-dollar piece of equipment in a single ply cardboard box with no reinforcement or protection and can say without question that I have never received anything so ridiculously packaged in my seventy years on this earth. I inspected the box for damage when it arrived and noted no obvious damage but upon opening the lid it was obvious that the protection it afforded would equate to shipping several dozen eggs in a Ziploc bag, The photos speak for themselves. The aluminum mounting plate is so badly bent that the engine mounting bolts nearly pulled through the plate and the aluminum tubing "frame" is similarly damaged. I spent over an hour and used forty yards of shrink wrap just to get the unit repackaged well enough to survive being picked up by UPS for return. I have chosen to receive a refund rather than take a chance on a replacement unit.

I read a LOT of reviews here on Amazon and other online resources before deciding to make such a sizable investment in this 4200 PSI/4.0 GPM machine. This is not my first pressure washer, but my third actually. Each time I upgraded in both PSI and gallons per minute. This is my first pressure washer that is categorized as commercial use. Having finally taken the time to put this machine to the test, I can honestly say this thing has more than enough power to satisfy the average homeowner or DIY’er. As I said in the title: this thing is a beast! Mine arrived complete and undamaged. Other reviewers reported scratches and dents but that was not my experience at all. Assembly was quick and easy. My shipment contained a quart of Amsoil synthetic 10W-30 for the engine crankcase but I have seen other reviewers that got their oil in a plastic pouch. Once assembled, the crankcase filled with the supplied oil, and the fuel tank filled 1/2 way, I hooked up the garden hose and bled the air out for 30+ seconds as recommended. Set the throttle to half-way and closed the choke and gave the starter a quick pull and it fired right up on the first attempt. After allowing the engine to run at partial throttle with the trigger open to keep the water flowing and the pump cooled for a few minutes, I increased the engine speed to approximately 3/4 and started cleaning the concrete patio as my first project with this unit. The pressure even at less than wide open on the Honda GX390 was more than enough to get the accumulated grime blasted off effortlessly. Next up, I connected my 15” surface cleaner which really sped up the process. The 4240 pressure and water flow are a perfect match for the Karcher 15” surface cleaner. With all of the positive attributes of this machine, there is one thing that I feel is a negative: the hose. It’s more than long enough for most jobs but the stiffness makes moving around with it a real challenge. Given the higher than average PSI capabilities of the ALH-4240 it’s not surprising that the pressure hose is more on the stiff side, but as others have commented, it would be a good idea to upgrade to a better hose. Honestly, at this price point, a better quality hose should come with it. Overall, the ALH-4240 is a great pressure washer that has all of the power that the average person could want for DIY use. The high PSI and GPM make short work out of even the toughest cleaning projects. Time will tell if it lives up to the Simpson advertised claims of dependability and reliability.

Great pressure washer. Has about every feature you could want including aluminum deck and frame, Honda motor and Cat pump. Very pleased with my purchase

This is a great pressure washer! Unfortunately after only a few minutes the washer lost pressure. I did have to contact support but they sent me right over to a warranty partner to fix it. Customer service is great as well

Great power washer - was shocked that it was shipped with Amsoil.... LOVE THAT Well built, easy to assemble the few items that's required and impressed with the unit so far.

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.