DEWALT Honda GX390 4200-PSI 4-GPM Belt Drive Gas Pressure Washer-DH4240B - The Home Depot


Model # DH4240B

Internet # 202066580

Store SKU # 268912

Honda GX390 4200-PSI 4-GPM Belt Drive Gas Pressure Washer

DEWALT Honda GX390 4200-PSI 4-GPM Belt Drive Gas Pressure Washer

This item has been discontinued.
The Home Depot no longer carries this specific product.

$1,299.00 / each


Model # DH4240B

Internet # 202066580

Store SKU # 268912

These DEWALT machines are guaranteed tough. Built tough to meet the rigorous demands of the cleaning professional or anyone who expects the most out their machine. Perfect for deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services. Our gas-powered machines are equipped with Honda GX OHV commercial series engines. These engines set the standard for durability and long life. The Honda engines are paired with AAATM industrial triplex plunger pumps, a brand with a history of over 40-years of innovation. AAATM pumps are equipped with PowerBoost, this patented technology delivers higher pressure to the spray nozzle, resulting in greater impact and cleaning performance. Exceptionally strong welded steel frame body and pneumatic tires for mobility across most any surface. Pro-style quick connect spray wands and nozzles, with professional spray gun, allows users to operate with ease. High pressure hoses are non-marring, kink and abrasion resistant, and utilizes poly and/or steel-braid technologies for exceptional strength and long-life. For those extra dirty jobs, drop the detergent siphoning tube into pressure washer safe detergent and attach the soap applicator nozzle.

California residents: seeProposition 65 information

  • Honda GX390 OHC commercial series engine with oil alert is easy starting, light weight and quiet, yet powerful - engine oil is included
  • AAA by comet industrial triplex plunger pump with ceramic coated pistons and adjustable unloaded for controlled pressure
  • Dual belt-drive system for longer pump and engine life
  • 3/8 in. x 50 ft. high pressure steel-braided hose is non-marring, kink and abrasion resistant, and equipped with quick connectors
  • Pro-style spray wand with 5 quick connect nozzle tips- 0 degree, 15 degree, 25 degree, 40 degree, and soap applicator nozzle
  • Professional spray gun designed to be comfortable and easy to operate - safety lock-out to prevent gun from being accidentally activated
  • Welded steel frame, steel engine plate, solid steel axle and 13 in. pneumatic tires for extreme durability and effortless maneuverability
  • Convenient on-board accessory storage for spray gun/wand, high pressure hose, and nozzles
  • Downstream detergent injection system for convenient use of cleaners
  • Limited warranty - commercial use - 3-year on Honda GX engine, 5-year on AAA pump, 1-year frame components, 90 days on spray accessory items
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Assembled Depth (in.)  36 in  Assembled Height (in.)  26.5 in 
Assembled Width (in.)  23 in  Hose Diameter (In.)  3/8 in 
Hose length (in.)  600  Wheel Diameter (in.)  13 in 
CA (CARB) Compliant  CARB Compliant  Commercial  Yes 
Detergent tank  No  Engine Displacement (cc)  389 
Engine Make  Honda  Engine Type  HONDA GX390 Commercial Series OHV Engine with Oil Alert® 
Foldable handle  No  Fuel tank capacity (gallons)  1.6 
GPM  Hose Material  Reinforced 
Maximum Pressure (PSI)  4200  Number of tips included 
Onboard storage  Yes  PSI Range  3200+ PSI 
Pressure Washer Power Type  Gas  Product Weight (lb.)  200 lb 
Pump Brand  Other  Pump Type  Triplex 
Reconditioned  No  Returnable  30-Day 
Start Type  Manual  Translucent fuel tank  No 
Water capability  Cold  Wheels  Yes 
Warranty / Certifications
Manufacturer Warranty  Limited Warranty - Commercial Use - 3 Years on Honda GX engine, 5 Years on AAA pump, 1 Year frame components, 90 Days on spray accessory items 


Rated 4.3 out of 5 by 15 reviewers.
Rated 5.0 out of 5.0 by belt pressure washer Excellent washer has plenty of pressure to wash and can regulate pressure. February 17, 2015
Rated 4.0 out of 5.0 by very good homeowner unit Bulletproof engine and belt drive to reduce the temperature and vibrations at the pump. But last years model had an external pressure relief system. This one is internal and that was a surprise to me. They also switched from a general pump to something else, and the general is known for its forgiveness in not scavenging the supply hose if the flow is inadequate. Still, for the money, its the best belt drive out there. It also has no external incoming water filter, and that is something I find mandatory. Its only a few bucks to add so its not a deal breaker. February 18, 2014
Rated 4.0 out of 5.0 by Research Pays Off! I had a Karcher 3500PSI Honda Engine for many years, constantly broke down (the pump). Finally decided to try this model. Did a lot of research. Warranty, price, PSI, and its from a company that should backup the product (both Dewalt and HD, yes I know its not made by Dewalt). Used the machine for about 15 hours continuously so far. Results, this is a powerful machine, and seems lightweight for the capacity. The wand uses the plug in's for pressure control width and intensity. Unfortunately, I do not see a valve to control water flow. There is a valve to control detergent flow. Frankly, for the price you aren't going to beat this one. The warranty seems good given that the pump units are prone to breakdown. Instructions were poor. Overall, I am so far pleased. August 14, 2014
Rated 5.0 out of 5.0 by Excellent Machine (noobie here. It didn't start) I purchased two. The fist unit, I was unable to make it work. Reviewer here named "Builder" appear to have had the same problem. Because the unit is not sold at the store and I couldn't wait, I had to order a second one. I had the same problem and it didn't start. At that point, I knew, it's either a terrible product or I'm doing something really wrong. I found the instruction contradicting each other. There are two sets of instructions. One is for the pump and the other for the engine. That was NOT clear to me (first time using a pressure washer and not much experience with gas machines). The instructions said "make sure each time, you check the oil is OK. There is a dot make sure oil is up to that line". Instruction also said, for your convenience, we have already filled it up with oil". So what's the problem? The instruction did not say "make sure BOTH sections of the pressure washer need oil". The instructions did not make this clear. When I checked the oil, oil was fine but there was no engine oil in the machine. Therefore, the machine would not start. I took it to Home Depot and the guy (manager) tested it and couldn't find anything wrong with it so I returned the first unit. I needed a machine so I ask if there is anything else I can try with the second one that I have in my house. He suggested to take it to the larger Home Depot that have a repair center. The guy there checked and asked, "did you put oil?" I said, the instructions said oil has already been added and to check, which I did. Then he said, "what about the engine oil?" and I said "what?" At that point, I just want to put my head in a bucket and hit myself with a brick. He added oil and without the choke pull the trigger and the machine started. Took the machine back home, with no choke, I pulled the trigger and the machine started just fine with one pull. I re-started it multiple times since and it only needs a single pull. Lots of power, easy to start, HEAVY but has wheels. Love it! I just hope it lasts for a while. September 10, 2014
Rated 5.0 out of 5.0 by It is well made It is easy to use and has alot of pressure. It's great that you can adjust the amount of pressure to what you need. I have used it to remove paint on brick walls, and to clean our sidewalks and store fronts. April 4, 2013
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