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Customer reviews for PowerShot 4200 PSI at 4.0 GPM HONDA® GX390 with Industrial Triplex Pump Cold Water Professional Gas Pressure Washer for
PowerShot 4200 PSI at 4.0 GPM HONDA® GX390 with Industrial Triplex Pump Cold Water Professional Gas Pressure Washer
4.7 out of 5 stars
stars
679 ratings679 reviews
  1. 5 stars84% (570)
  2. 4 stars12% (81)
  3. 3 stars1% (9)
  4. 2 stars1% (4)
  5. 1 star2% (15)
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Showing 1-10 of 679 reviews
Nov 8, 2026
Reviewer name: Milksr masher
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Simple to use my little giant!

I had purchased the headshot 3100psi in September and it did such a great job my son decided he would buy one . Seeing how close to Christmas we are l gave him mine and I bought the next size up? It's amazing what 300 more psi can do! Both are great machines. If you need a pressure washer, you definitely should try a Simpson product!

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Sep 21, 2026
Reviewer name: AnitaCHS123
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

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!

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Sep 16, 2026
Reviewer name: DTHservices
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great

Ah, perfecto. Entonces sería: I’ve had this pressure washer for 10 years, and it has worked really well. I bought another one because it’s honestly a great pressure washer! O más natural para una reseña: I’ve had this pressure washer for 10 years, and it has worked great. I just bought another one because it’s honestly that good. Highly recommended!

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Oct 8, 2026
Reviewer name: Chris12183
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Tons of Power!

Bought this to clean a 2 story house with very high peaks. The machine did great and no problem getting the stream of water to the peaks. It started on the second pull after getting it unboxed, assembled, and the oil in and started on the first pull each time while starting and stopping it while pressing washing the house. Very glad I pulled the trigger to buy it; it FAR out performs my previous 2GPM 2200PSI machine..night a day between the two. So far it's a great machine!

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Nov 4, 2026
Reviewer name: Ledhead21
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Awesome Pressure Washer

[This review was collected as part of a promotion.] Bout hit on a Monday and it came in on Friday. No have used it for 2-3 hours now with no problems whatsoever.

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Jul 19, 2026
Reviewer name: bricks
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

pressure washing business

[This review was collected as part of a promotion.] This is one of the best pressure washer I have ever used so far. It is easy to set-up and to fix if need be. I am using it for an huge storefront job here soon, also for an HOA. Let me know if you if it hold up.

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Oct 30, 2026
Reviewer name: E1khuntr
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Pressure good, burn hazard

Excellent pressure. Handle could be higher. Noise level normal. One major design flaw: exhaust and pull-start. You must stand directly infront of exhaust to use pull start.

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
Sep 9, 2026
Reviewer name: Property Care Business
3 out of 5 stars
3 out of 5 stars review

Verified Purchase

Works great but .

It worked great for about a month. It's now in the shop because the exhaust was glowing red and it shot an 8 inch flame out of it when I last shut it off. Hopefully just a valve adjustment and I can get it back. Until then my business is at a standstill. It's been down a week so far and I'm worrying about paying my bills.

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
May 31, 2026
Reviewer name: Ben11
3 out of 5 stars
3 out of 5 stars review

Verified Purchase

CHEAP SPARK PLUG

Starting off I could not crank the washer.....After the tenth pull and it was still not firing...I took out the Spark Plug,,, I found that the GAP WAS CLOSED. so I set the gap and pulled again. Started to fire then back fired... Then no fire...Reset the plug... Cranked right up... Did a Great Job on cleaning concrete with the Whirie....Since then, I have replaced the plug..........For the cost of the machine,,,you CHEAPEDOUT on the spark plug......

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
reply from Simpson Team

Hello, Ben11. This certainly isn't normal & we appreciate you bringing the condition of the spark plug to our attention. We're glad you were able to resolve the issue & have since enjoyed a smooth performance. We will be sure to document your experience for our records - thanks for taking the time to review!

Apr 24, 2026
Reviewer name: Mikey D
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Horrible

I just bought this pressure washer and I’ve been trying to get in touch with someone because it has multiple issues….. The chemical injector doesn’t work, the unloader valve cap/pressure regulator cap has popped off twice which isn’t supposed to happen. This product is supposed to be the best on the market and I can’t tell. Horrible experience.

Review from simpsoncleaning.com
Helpful?7AT7XV54Y2LL15224104831
reply from Simpson Team

Hello, Mikey D. This isn't the experience we strive for & we're sorry to hear about the condition of this unit. Try reaching out to our team directly at 877-362-4271 or email us at productsupport@simpsoncleaning.com, and we hope to determine how to get the issues with the injector & unloader valve resolved as quickly as we can. Thanks for sharing this valuable feedback & we hope to be speaking with you very soon!