Honda GX390 OHV Commercial Series Engine With Oil Alert® •Starts easy, runs smoothly, & delivers high output; engine oil is included •Delivers up to 4200 PSI to handle large jobs efficiently
CAT® Industrial Triplex Plunger Pump •Triplex pumps run cooler & last longer than axial pumps; can be rebuilt •Develops up to 4 gallons per minute to clean quickly
Professional Grade Aluminum Platform •Brushed extruded aluminum tubing is strong & lightweight •10 year Factory Warranty on frame components
Dial-N-Wash® Spray Gun •Adjust pressure from 1000 PSI to MAX PSI with a simple twist •Safety lock-out to prevent gun from being accidentally activated
Pro-Style Spray Wand With 5 Quick Connect Nozzle Tips •0°, 15°, 25°, 40°, & soap applicator nozzles shape the spray
3/8" x 50' High Pressure Steel-Braided Hose •Non-marring, kink & abrasion resistant hose lets you work in a wide area
Siphon Tube Detergent Injection •Lets you use a wide variety of pressure washer-safe cleaners
Engine
Engine Brand
Honda GX
Starter
Recoil
CC
389 CC
Fuel Tank Size
6.4 quarts
Consumer Engine Warranty
3 Years
Commercial Engine Warranty
3 Years
Pump
Pump Brand
Cat
Pump Type
Triplex Plunger
Adjustable Pressure
Yes
Chemical Injection
Siphon Tube
Water Temperature
Cold
Pump Consumer Warranty
2 Years
Pump Commercial Warranty
2 Years
Water Pressure
4200 PSI
Water Flow
4 GPM
Housing
Frame Type
Aluminum
Wheels
Pneumatic
Hose
Hose Storage
Hook
Hose Length
50 Feet
Hose Material
Rubber
Hose Diameter
3/8 Inch
Hose Connections
Quick-Connect
Spray Gun
Spray Gun Connection
Quick-Connect
Spray Gun Grade
Professional
Spray Gun Wand
Single Wand
Spray Tips
Quick Connect Tips (5)
Turbo Nozzle
Sold Separately
Overview
Weight
124 Pounds
Product Length
40 Inches
Product Width
24 Inches
Product Height
26 Inches
Consumer Warranty
1 Year
Commercial Warranty
1 Year
UPC
879399001345
Model
ALH4240
Download Documents
No documents available at this time
2 Questions
Q: Hi Mike, Is the pressure of this model adjustable only through the gun or can you adjust the pressure on this cat pump as well? by Mark from Missouri on March 08, 2016
A: There is a regulator between the spray gun and spray lance to allow you to dial down your pressure. There is ALSO an unloader valve on the CAT pump allowing you to adjust the pressure there as well. by Brian, Product Expert
Q: Hi Mike. Do you know what model/part CAT pump is in the ALH4240? Thank you by Cliff from New Hampshire on March 17, 2015
82% of respondents would recommend this product to a friend
17 Reviews
Sort by
Cooper G. Denton, TX
Purchased 4/20/15
2 Reviews
Most Helpful Positive Review
REVIEWED
MAY.
12
2015
Awesome Bank For Your Buck
This is a great deal for a really high quality pressure washer. You cant beat this combo of Honda and Cat. This thing comes with everything you need. It is basically fully assembled right out of the box. All I had to do was put the handle on it, put oil in the motor (supplied), add gasoline and I was done. It started on the first pull.
This thing has a crazy amount of power. I was skeptical about the pressure regulation on the wand but it turned out to be one of the most convenient features. The soap suction tube works great also. The aluminum frame is a nice feature as well.
Overall I am very happy with the purchase I believe this pressure washer will last me a VERY long time. This has ample power to take care of anything around the house/ranch. It makes the pressure washers at Lowes and Home Depot look like toys.
This is a great deal for a really high quality pressure washer. You cant beat this combo of Honda and Cat. This thing comes with everything you need. It is basically fully assembled right out of the box. All I had to do was put the handle on it, put oil in the motor (supplied), add gasoline and I was done. It started on the first pull.
This thing has a crazy amount of power. I was skeptical about the pressure regulation on the wand but it turned out to be one of the most convenient... more
Pros:Durable, Easy To Use, Price, Exceeded Expectations
Cooper Recommends This Simpson Product
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73
James F. Lafayette, IN
Purchased 5/30/17
REVIEWED
JUL.
17
2017
Great Pressure Washer, Plenty Of Power
If you want enough power and volume of water to do about any cleaning job, this would be one to check out. I use mine for Business, I have two of them, run them every day ( no weekends ).
The Honda engine has brute power and the triple stage Cat pump kicks out 4.5 gal per minute. Water volume is every bit as important as pressure in most cleaning jobs. This unit comes with a wand that has a variable pressure front grip adjustment. If you are cleaning your car and don't want to blow the stripes off of it, crank down the pressure, you still have plenty of volume to safely use.
I use a 20 inch surface cleaner at full power on concrete with great results. Starts easy, good run time on a tank of gas. Not really a machine for a beginner, use the correct wand tip for the job, (it comes with 4 different ones) this thing has enough power to blow things apart if not properly used. Also works well with extension wands up to 24 feet.
If you want enough power and volume of water to do about any cleaning job, this would be one to check out. I use mine for Business, I have two of them, run them every day ( no weekends ).
The Honda engine has brute power and the triple stage Cat pump kicks out 4.5 gal per minute. Water volume is every bit as important as pressure in most cleaning jobs. This unit comes with a wand that has a variable pressure front grip adjustment. If you are cleaning your car and don't want to blow the... more
Pros:High Quality, I'd Buy It Again, Durable, Reliable
Cons:Expensive
James Recommends This Simpson Product
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00
Christopher H. Perrineville, NJ
Purchased 5/29/17
2 Reviews
REVIEWED
JUN.
22
2017
What Did You Expect
Awesomeness, hope she runs forever. Bought the General Pump power nozzle, cleaning the s... out of everything.
Pros:Easy To Use, I'd Buy It Again, High Quality, Features
Cons:Wish it came with a little man to powerwash for me while i drink
Christopher Recommends This Simpson Product
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00
Michael C. Mattawan, MI
Purchased 4/30/17
REVIEWED
MAY.
22
2017
The Beast!
If you have the money, this is the best! You have to be a little careful. It will take paint off very quickly. It blew the stickers right off my UTV and tractor. There is a dial to turn it up or down.
When power washing our front door water came through the seals and got all over the house.
This will save you time and effort, but again be careful, it's got a lot of power compared to lesser washers.
I wear ear protection while using this product. It is loud.
Pros:Easy To Use, Features, High Quality, I'd Buy It Again
Cons:Heavy, Expensive, Loud
Michael Recommends This Simpson Product
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00
Ronald H. Houston, TX
Purchased 4/14/17
REVIEWED
MAY.
09
2017
Power Washing With Ease
Powerful and easy to use. Best Power Washer I have ever used. Actually performs twice as fast as my previous washer.
Pros:Easy To Use, I'd Buy It Again, High Quality, Price
Ronald Recommends This Simpson Product
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00
Randy A. Van Wert, OH
Purchased 4/7/17
REVIEWED
MAY.
02
2017
This Is A Professional Pressure Washer
Received the Simpson pressure washer, by freight carrier, with no damage. Took all of about 10 minutes to assemble, filled crankcase with oil (supplied with the unit) and filled the gas tank.
Quality of the unit is excellent. Very well built, and just a bit on the heavy side. But, this is a professional pressure washer. As soon as you crank up this baby, and pull the trigger for the first time you quickly realize that this isn't like any pressure washers you may have purchased from your home improvement store.
Very powerful spray pressure. The adjustable pressure control on the handle is very handy feature. I started out washing concrete at high pressure, and could simply turn the pressure control down to low to power wash the siding on the house.
I also purchased the Simpson surface cleaner device for this unit and wow! Amazing combination to quickly make concrete look like new. This Simpson power washer will reduce my power washing time tremendously! Everyone will want to exercise caution with this much pressure. You could quickly do damage to practically any surface if you are not careful. Remember the pressure is adjustable with the pressure control knob on the spray wand and the speed of the engine.
I am Very happy with this pressure washer. With the Honda engine and the Cat pump this will likely be the last pressure washer I have to purchase. I bought this 4200psi Simpson pressure washer to replace a 12 year old Troy-bilt 2550psi pressure washer. I am not a contractor.
Received the Simpson pressure washer, by freight carrier, with no damage. Took all of about 10 minutes to assemble, filled crankcase with oil (supplied with the unit) and filled the gas tank.
Quality of the unit is excellent. Very well built, and just a bit on the heavy side. But, this is a professional pressure washer. As soon as you crank up this baby, and pull the trigger for the first time you quickly realize that this isn't like any pressure washers you may have purchased from your... more
Pros:Easy To Use, Exceeded Expectations, High Quality, I'd Buy It Again
Cons:Heavy, Expensive
Randy Recommends This Simpson Product
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00
Michael I. Lawrence, PA
Purchased 4/3/17
2 Reviews
REVIEWED
APR.
26
2017
Wow
Wow this thing has a ridiculous amount of power. I have an excavating company and I used it to clean the mud from the tracks of the skid loaders and excavator.
So fast and powerful. I'm a big guy and I was impressed when I pulled the trigger it pushed my arm back..haha.
Packing was excellent!!
Pros:Easy To Use, Fast, I'd Buy It Again
Michael Recommends This Simpson Product
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00
Ray T.
Purchased 9/29/16
REVIEWED
OCT.
21
2016
Awesome Power!
This machine is just awesome - what used to take days now takes hours. I'm really happy with it. It was easy to set-up and get started cleaning without too much time and with no trouble.
More details...
The Honda engine seems to take a long time to warm-up but I assume it's because it's a big engine. It's awfully rough when warming-up, too, and the whole unit shakes quite violently. When it finally gets going, it's smooth and there's plenty of power.
The ability to adjust PSI via the wand is a must. At full PSI, it's difficult to manage changing hands/arms, which is necessary regularly. And, you can easily switch from cleaning wood to concrete by just turning the dial. It's a great feature. I'm not sure what I'll do when it breaks.
The hose is heavy and somewhat inflexible but that goes with its 4500 PSI rating. I bought an extra hose, too, for 100 ft total and it's heavy dragging it all around, not to mention how much more weight it adds to the unit when moving it all around and storing it.
I don't know what a turbo nozzle is not standard issue - I got one of those, too, and it's unbelievable.
I'm running out of things to clean, now.
This machine is just awesome - what used to take days now takes hours. I'm really happy with it. It was easy to set-up and get started cleaning without too much time and with no trouble.
More details...
The Honda engine seems to take a long time to warm-up but I assume it's because it's a big engine. It's awfully rough when warming-up, too, and the whole unit shakes quite violently. When it finally gets going, it's smooth and there's plenty of power.
Pros:Exceeded Expectations, Features, Fast, High Quality
Ray Recommends This Simpson Product
Product Expert
Ray,
The Pressure Regulator is sold separately, so it can be added to many existing systems or replace one that's worn out.
Pressure washer sales are very price-sensitive, so manufacturers try to cram the most quality in the smallest price they can- a few dollars shaved here or added there can make a big difference in sales. Keeping the turbo nozzle as an accessory lets folks get used to their pressure washer's abilities and then decide if they need more hard surface cleaning, and allows the manufacturers to compete on fairly equal ground.
I purchased this washer to clean my house and farm equipment. It has done a great job. I have washed the house, driveway, mower, truck and trailer. I am very impressed with the performance of this machine. I would recommend it to anyone needing a pressure washer.
Pros:Durable, Easy To Use, Exceeded Expectations, Reliable
Cons:Expensive
Mike Recommends This Simpson Product
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198
Nathan V. Flagstaff, AZ
Purchased 1/19/16
REVIEWED
FEB.
16
2016
Mixed Feelings
Pressure washer wand started leaking badly within two hours of very first use. Need to send back, but also need the machine!
Overall, the pressure washer has good power, but it's too early to tell about the overall quality. Very disappointed that I have to deal with the wand situation.
Pros:Easy To Use, Fast, Easy To Store
Cons:Low Quality, Bad Wand
Nathan Does Not Recommend This Product
Product Expert
Nathan,
I am sorry you're having an issue with your wand leaking- I understand how disappointing that can be! First of all, would you please check the wand/handle connection to make sure there isn't something caught in the threads to cause the leak, and that the wand is seated snugly when it's connected to the handle?
If all is well there, then please contact Zac Dawson at Simpson: 1-847-621-8954 or via email at zdawson@fna-group.com. He will be happy to help you in any way possible. If you would please have the serial number of your pressure washer handy when you call, or include it in your email the folks at Simpson will find it helpful.
I don't believe they will have you send the wand back; they should send out a replacement promptly so you lose as little cleaning time as possible.
If there's anything else I can assist with, please feel free to contact me directly at 800-710-7499. We appreciate your business, and apologize for any inconvenience.
I needed a power washer with allot of psi to remove some material from my deck and this pressure washer fit the bill. Took a little longer than I expected to get it as it came direct from the factory. When I got it and assembled it (which was easy), I filled the oil and gas up and it started first pull. I have only used it about 10 hrs total but it works great.
The adjustable pressure feature is really nice. probably more than the average homeowner needs but I like to go over not under. I agree with other reviews the handle needs to be about 12" higher to make it easier to roll around. it is a solid unit with a big engine and pump.
I needed a power washer with allot of psi to remove some material from my deck and this pressure washer fit the bill. Took a little longer than I expected to get it as it came direct from the factory. When I got it and assembled it (which was easy), I filled the oil and gas up and it started first pull. I have only used it about 10 hrs total but it works great.
The adjustable pressure feature is really nice. probably more than the average homeowner needs but I like to go over not under. I... more
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Great Pressure Washer, Plenty Of Power
