SIMPSON PowerShot HONDA GX390 Engine 4200-PSI 4-GPM Cold Water Gas Pressure washer with 5 Spray Tips

Name: SIMPSON PowerShot HONDA GX390 Engine 4200-PSI 4-GPM Cold Water Gas Pressure washer with 5 Spray Tips
Brand: SIMPSON
SKU: 1000120331
Price: 1199 USD
Availability: InStock
Rating: 4.6 (743 reviews)

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4.6

743

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Designed for professional cleaning, this SIMPSON PowerShot pressure washer delivers 4200 PSI at 4.0 GPM for strong cold-water cleaning performance. The HONDA GX390 engine provides dependable gas-powered performance and includes low-oil shutdown for added protection. A AAA industrial triplex pump pairs with the direct-drive system to support reliable operation on demanding jobs. The welded steel frame with a powder-coated finish provides durability and corrosion resistance. With its included high-pressure hose, spray gun, quick-connect nozzles, and durable tires, it is well equipped for deck cleaning, wood restoration, paint preparation, graffiti removal, equipment cleaning, and other professional cleaning services.

Delivers 4200 PSI at 4.0 GPM for deck cleaning, wood restoration, paint preparation, graffiti removal, equipment cleaning, and other professional cleaning services
HONDA GX390 engine features low-oil shutdown for added engine protection
AAA triplex pump with an integrated unloader and thermal relief valve; direct drive
Welded steel frame with a powder-coated finish provides durability and corrosion resistance
50 ft x 3/8 in Monster dual-braided high-pressure hose is kink- and abrasion-resistant with a non-marring polyurethane outer jacket and QC fittings; spray gun with rear-load QC connection
13 in premium pneumatic tires provide maneuverability across a variety of terrain
Includes five quick-connect nozzle tips: 0°, 15°, 25°, 40°, and soap for a variety of cleaning applications
CETA Certified
3-year limited commercial engine warranty; 5-year limited commercial pump warranty; 10-year limited commercial frame warranty

General
Package Contents	Pressure washer, hose, spray gun, spray lance, spray nozzles, siphon tube with filter, engine oil, owner's manual, and quick setup guide	Start Type	Manual/Pull start
Type	Pressure washer	Wheel Type	Pneumatic
Usage	Heavy-duty	Power Source	Gas
Grade	Commercial/Residential	Series Name	PowerShot HONDA GX390 Engine
Hose Material	Steel	Wheel Material	Rubber
Nozzle Type	Pro style tips with quick disconnect	Color/Finish Family	Black
Pump Type	Triplex	Manufacturer Color/Finish	Black

Dimensions
Depth (Inches)	38	Fuel Capacity (Gallons)	1.6
Height (Inches)	29	Hose Diameter	3/8-in
Weight (lbs.)	136	Hose Length (Feet)	50
Width (Inches)	23.5	Wheel Diameter (Inches)	13
Amperage	0	Engine Oil Capacity (oz.)	37.12
Cord Length (Feet)	0	Battery Amp Hours	0

Features
Brushless	Yes	Engine Series	GX390
Variable PSI	No	Engine Torque (Foot/lbs.)	9.1
Water Temperature	Cold	Number of Batteries Included	0
Wheels Included	Yes	Pressure Rating (PSI)	4200
Reconditioned	No	Quick Connect Tips	Yes
Water Tank	No	Chemical/Detergent Injection	Yes
Includes Surface Cleaner	No	Flow Rate (GPM)	4
Soap Applicator Included	No	Lowe's Exclusive	No
Adjustable Wand	No	Engine Oil Included	Yes
Battery Recharge Time (Hours)	0	Engine Horsepower	0
Battery Run Time (Hours)	0	Recommended Engine Oil	10W-30
Corded/Cordless	Cordless	Number of Spray Tips Included	5
Detergent Tank Options	None	Interchangeable Wands	Yes
Engine Brand	Honda	Integrated Storage	No
Engine Displacement (Cu. Centimeters)	389

Warranty
Warranty	3-year limited

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	CARB Compliant	No
Safety Listing	Not safety listed

Miscellaneous
UNSPSC	47121800

Check out the Best Selling Pressure Washers on Lowes.com

Review

4.6 out of 5

743 Reviews

87% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

+ 28

What Customers Are Saying

Customers overwhelmingly praise this pressure washer for its exceptional 4200-4400 PSI power and durability, with most highlighting its ability to cut cleaning time in half on driveways, concrete, and siding. The Honda GX390 engine earns consistent praise for reliable starts and longevity confidence. Reviewers emphasize the heavy-duty construction and professional-grade build quality. A small number report warranty service challenges, pump leaks, and note the unit is heavy and requires manual consultation for maintenance. Despite minor drawbacks, most customers consider it an excellent investment for serious cleaning tasks.

Customer review summary generated by AI, including incentivized reviews.

744 Customer Reviews

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Efficient

New to the pressure washing world. And everyone was saying get a Simpson to start out. Well ended up getting one and now I see the what everyone was raving over. Strong, durable, and efficient.

Cam the cleaner’sSeptember 29, 2026

From simpsoncleaning.com

Incredible power,

Engine started first pull after going through the prep steps. Power and volume is impressive. Overall, the machine looks and feels to be high quality.

BryzarrSeptember 28, 2026

From simpsoncleaning.com

Awesome machine, easy to use

I took this thing off the truck and right to work. Great Product.

HanoverSeptember 23, 2026

From simpsoncleaning.com

Good power

Happy we bought it works great easy setup powerful easy to use for my wife too. Price was great

DeanG224September 23, 2026

From simpsoncleaning.com

Great pressure washer!

I just recently bought it and have used it twice at my home so far! It’s very awesome so far and was easy to put together and understand how to use! The manual was very helpful! I cannot wait to use this at customers homes! Highly recommend this model!

MP5 shooterSeptember 23, 2026

From simpsoncleaning.com

Solid Build

Just unboxed this today. Seems very solid. Easy to put together and get going.

rdriskillSeptember 22, 2026

From simpsoncleaning.com

Great power well built.

I recently purchased this model after reading many reviews. The unit is well built and I liked the Honda motor, which was the main attraction for me. The pump has a ton of power and the 4 gal/min is just what I need for powerwashing concrete. I definitely recommend this washer.

Vinny PSeptember 22, 2026

From simpsoncleaning.com

Nice unit!

Perfect! Easy to use and does a great job on all tasks.

KDW61September 21, 2026

From simpsoncleaning.com

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86c2ltcHNvbg/2bd401d2-646f-5789-8130-2ca99427e191

Excellent for gum removal on concrete!

We love our Simpson machine! Throughout the years I e worked with several models and they have never let me down! I love the fact that the can remove the old dried up gum from the school grounds without damaging the concrete! The size of the machine makes them extremely portable and easy to move too! Simpson is the brand for us!

AnitaCHS123September 21, 2026

From simpsoncleaning.com

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86c2ltcHNvbg/ff2f51c6-eab1-50be-baea-e4b4e1880a4d

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86c2ltcHNvbg/4ea8f5bf-51e5-5041-8d80-016d1fa08dbd

It's a beast!!!

After months of researching I finally pulled the trigger, it has been the best decision I have made. The warranty is best in the business. I feel like it's in beast mode every time I start it up! Don't look any further!!

Mike_MikeSeptember 21, 2026

From simpsoncleaning.com

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		Name	Current Item SIMPSONPowerShot HONDA GX390 Engine 4200-PSI 4-GPM Cold Water Gas Pressure washer with 5 Spray Tips
		Ratings	742
		Usage	Heavy-duty
		Pressure Rating (PSI)	4200
		Engine Brand	Honda
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