This pressure washer has an unloader valve that can be adjusted to allow for a lower pressure. Our pressure washer gauge, item #32154 would aid in accurately adjusting the pressure.
Free Gift Card Details
$100 Order
$250 Order
$500 Order
$1000 Order
- The promotion will be automatically applied on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $100 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax and shipping.
- Free gift cards will be issued in the form of e-gift cards only, not physical gift cards.
- E-gift cards will be sent to the email address used in your billing address when your order ships or is picked up.
- Free e-gift cards expire 11/01/26.
- Promo code not valid on prior purchases or on Honda and STIHL products and cannot be combined with other promotional offers.
- Valid online and in participating retail stores.
- Limited-time offer. Subject to change without notice.
Powerhorse Portable Gas Cold Water Pressure Washer, 4000 PSI, 4.0 GPM, Model #1574200

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Click or Tap image to Zoom
This item is no longer available.
- Powerhorse 420cc OHV engine with low oil shutdown
- Annovi Reverberi direct drive triplex pump
- Stainless steel ceramic-coated plungers
- Brass manifold
- Easy Start for convenience
See full description
Description
Key Specs
Reviews
Q & A
Accessories
Warranty
Compare
Product Summary
What's Included
- (1) Pressure washer (1) 35ft. quick-connect hose (1) Lance and gun (5) Quick-connect nozzles
Downloads

Features + Benefits

- Powerhorse 420cc OHV engine with low oil shutdown
- Annovi Reverberi direct drive triplex pump
- Stainless steel ceramic-coated plungers
- Brass manifold
- Easy Start for convenience
- Unloader valve provides adjustable pressure
- Includes 5 quick-connect nozzles
- Quick-connect 35ft. 3/8in. hose, lance and gun
Key Specs
| Attribute | Specification |
|---|---|
item# | 1574200 |
Brand | Powerhorse |
Manufacturer's Warranty | 2 year limited warranty |
Ship Weight | 144.0 LB |
Pressure | 4,000 PSI |
Flow | 4 GPM |
Engine Model | DH420 |
Engine Displacement | 420 cc |
Fuel Type | Gasoline |
Pump | AR Triplex |
Drive Style | Direct |
Number of Tips Included | 4 |
Adjustable Pressure | Yes |
Gross Torque | 2,500 ft-lbs. |
Engine Oil Included | No |
| Attribute | Specification |
|---|---|
Engine Oil Type | SAE 10w-30 |
Fuel Capacity | 1.7 Gal |
Max. Inlet Water Temp | 140 °F |
Orifice Size | 4 |
Chemical Injector | Yes |
Hose Length | 35 ft |
Coupler Size | 3/8 in |
Nozzle Type | Quick-connect |
Quick Connect Nozzle | Yes |
Pump Oil Included | Yes |
Pump Oil Type | SAE 30 Nondetergent |
Low Oil Shutdown | Yes |
Thermal Protector | Yes |
Product Weight | lb |
Dimensions L x W x H (in.) | 29.0 x 24.0 x 46.0 in |
Reviews
Questions & Answers
Questions
-
· 7 years ago
Is pressure adjustable?
I want to use this with a surface cleaner that has a maximum pressure rating of 3500psi. Is the pressure adjustable so the surface cleaner isn't damaged?
-
PowerhorseExpert6· 3 years ago
Helpful?
-
thedirtbikekidofconroe· 6 years ago
Yes. It comes with a built in unloader valve which allows you to adjust the pressure.
Helpful?
-
-
· 2 years ago
what is the little black box on the side of the engine with 2 lines coming out of the breather box
1 answer-
PowerhorseExpert11· 2 years ago
This will be the positive and negative leads to the control box assembly.
Helpful?
-
-
· 3 years ago
Does this pressure washer take a special kind of pump oil or have its own reservoir for the pump oil?
1 answer-
PowerhorseExpert29· 3 years ago
The pump will be shipped with oil in it. You will need to check the oil level prior to starting for the first time. If the pump needs to be filled or topped off, SAE15W-40 non-detergent pump oil, or SAE 30W non-detergent pump oil can be used.
Helpful?
-
-
· 3 years ago
Does this have a compatible hose reel that can be mounted?
1 answer-
PowerhorseExpert12· 3 years ago
At this time, we do not offer a hose reel that can be mounted on this Powerhorse pressure washer.
Helpful?
-
-
· 4 years ago
Can I use a foam cannon with this pressure washer? Item number 112978. I can't tell why some washers do not recommend using foam cannons, and some say it is fine. What's the difference?
1 answer-
PowerhorseExpert12· 4 years ago
The foam cannon, item 112978, can be used with this pressure washer. It is rated for use with pressure washers up to 4000 PSI and 6.5 GPM. This pressure washer produces 4000 PSI and 4.0 GPM.
Helpful?
-
-
· 4 years ago
What’s the replacement carburetor for this unit
1 answer-
PowerhorseExpert6· 3 years ago
The replacement carburetor kit, part number 798766 would be available through our sister company, Jacks Small Engines. Please visit www.jackssmallengines.com for price and availability.
Helpful?
-
-
· 4 years ago
how does the chemical injector work?
1 answer-
PowerhorseExpert6· 4 years ago
You would insert the chemical hose onto the injector to pull the chemical from the onboard chemical tank to the pump.
Helpful?
-
-
· 5 years ago
Can you run bleach?
1 answer-
PowerhorseExpert6· 3 years ago
This model is not recommended for bleach. Certain chemicals, such as bleach or those containing
muriatic acid will cause pump damage, if introduced upstream through the pump's water inlet. See our Northstar soft wash system, item #157140 that can be used with bleach.Helpful?
-
-
· 5 years ago
What is the ratio for the downstream injector and can chlorine be put in it?
1 answer-
PowerhorseExpert7· 5 years ago
Mix 1 part chemical to 10 parts water. Chlorine cannot be used with this.
Helpful?
-
-
· 5 years ago
What's the capacity of the chemical tank? How much cleaning solution does it hold?
1 answer-
PowerhorseExpert29· 5 years ago
The chemical tank on this pressure washer will hold 1.2 Liters of a cleaning solution.
Helpful?
-
Accessories We Recommend
This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.
NorthStar Nonmarking Pressure Washer Hose, 4000 PSI, 50ft. x 3/8in.
Item # 42945
Order today to get this price.
NorthStar Nonmarking Pressure Washer Hose, 4000 PSI, 50ft. x 3/8in.
Item # 42945
Order today to get this price.
Warranty
Manufacturer's Warranty
2 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
Compare with Most Popular in Gas-Cold Water Pressure Washers
See All Gas-Cold Water Pressure Washers
See All Powerhorse Gas-Cold Water Pressure Washers
Currently Viewing This Product
Shipping: Sold Out
Item # 638651
$2119.99Shipping:
Not availableIn Store Only:
Item # 638641
$1399.99Reg $1499.99Save $100.00Order today to get this price.
Shipping:
Not availableIn Store Only:
Item # 638631
$909.99Reg $979.99Save $70.00Order today to get this price.
Shipping:
Not availableIn Store Only:
Specifications
4,000 PSI
4,200 PSI
3,200 PSI
2,700 PSI
4 GPM
4 GPM
3 GPM
2.7 GPM
DH420
800
600
400
420 cc
429 cc
208 cc
196 cc
Gasoline
Gasoline
Gasoline
Gasoline
AR Triplex
Triple
Triple
Brass manifold
Direct
Direct
Direct
Direct
4
4
4
4
Yes
No
Yes
Yes
2,500 ft-lbs.
-
-
-
No
Yes
Yes
Yes
SAE 10w-30
10w-30
10w 30
10w 30
1.7 Gal
1.3 Gal
1.2 Gal
1 Gal
140 °F
-
-
-
4
-
-
-
Yes
Yes
Yes
Yes
35 ft
50 ft
40 ft
25 ft
3/8 in
-
-
-
Quick-connect
stainless steel nozzles
Brass
Brass
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SAE 30 Nondetergent
-
-
-
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
lb
168.0000 lb
118.0000 lb
90 lb
29.0 x 24.0 x 46.0 in
33.0 x 31.0 x 32.0 in
32.75 x 29.0 x 28.0 in
-
-
Kohler
Kohler
Kohler
-
Manual
Pull
Pull
-
-
-
No














