Simpson

PowerShot 4200 PSI at 4.0 GPM HONDA® GX390 with Industrial Triplex Pump Cold Water Professional Gas Pressure Washer

|609 ratings
Item # 990286907
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Highlights

  • HONDA® GX390 engine is equipped with a low oil shutdown feature
  • AAA® triplex pump has an integrated unloader with a thermal relief valve
  • Monster, 50 ft. dual braided high-pressure hose is kink and abrasion-resistant with a non-marring polyurethane outer jacket with QC fittings
  • Welded steel frame construction with a powder-coated finish for durability and corrosion resistance
  • 13 in. Premium pneumatic tires for ease of maneuverability across various terrain
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    5 out of 5 stars
    5 out of 5 Stars. 8 reviews
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    powershot 4200 psi at 4.0 gpm honda® gx390 with industrial triplex pump cold water professional gas pressure washer three-quarter front view showing powder-coated welded steel frame, HONDA GX390 engine with low-oil shutdown, AAA triplex pump with integrated unloader, coiled 50 ft. dual-braided high-pressure hose with QC fittings, and 13 in. pneumatic tires; often used by contractors for deck cleaning, paint prep, and graffiti removal.
    PowerShot 4200 PSI at 4.0 GPM HONDA® GX390 with Industrial Triplex Pump Cold Water Professional Gas Pressure Washer
    Hero image 0 of PowerShot 4200 PSI at 4.0 GPM HONDA® GX390 with Industrial Triplex Pump Cold Water Professional Gas Pressure Washer, 0 of 17

    About this item

    Product details

    Superior Cleaning Power

    The SIMPSON® PowerShot™ Series is specifically designed to withstand the rigorous demands of professional cleaning. These heavy-duty pressure washers offer outstanding flow and unbeatable reliability, making them the ideal choice for contractors specializing in deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services.

    High-Quality Engine

    Each SIMPSON® PowerShot™ pressure washer is equipped with a premium HONDA® engine that is 49-State compliant. These engines are constructed with high-quality components to ensure optimum performance. They are also renowned for their easy-start feature, which makes them a favorite among professionals.

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    Specifications

  • 5 Quick connect nozzle tips, 0°, 15°, 25°, 40° and soap nozzle to use for a variety of cleaning applications
  • Unit Dimensions: L 38 in. x W 23.5 in. x H 29 in.
  • Unit Weight: 136 lbs.
  • Images shown may vary from the actual unit
  • This product is not for sale in California

    • Member ratings & reviews

    4.7 out of 5 stars
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    609 ratings609 reviews
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    1. 5 stars83% (507)
    2. 4 stars12% (76)
    3. 3 stars1% (7)
    4. 2 stars1% (4)
    5. 1 star2% (15)
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    Showing 1-3 of 609 reviews

    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
    Jul 3, 2026
    Reviewer name: Donnie8478
    5 out of 5 stars
    5 out of 5 stars review

    Verified Purchase

    Powerful

    I bought the Simpson pressure because I wanted more cleaning power for my house siding, sidewalks and driveway. I previously had a 15 year old 3500 psi that the pump died. It didn’t cost much more to buy a new 4400 Simpson than a new pump. There is a world in the cleaning ability of the Simpson. I would highly recommend this pressure washer to anyone that has heavy duty cleaning Donnie Murphy

    Review from simpsoncleaning.com
    Helpful?7AT7XV54Y2LL15224104831
    Jun 7, 2026
    Reviewer name: Alan Burton
    5 out of 5 stars
    5 out of 5 stars review

    Verified Purchase

    A rock solid pressure washer

    [This review was collected as part of a promotion.] As soon as I unpacked my pressure washer it was obvious that it was constructed from quality materials. Everything about it looked solid and well built. I'm certain I will get years of service out of this machine with proper maintenance. It's everything I expected and more.

    Review from simpsoncleaning.com
    Helpful?7AT7XV54Y2LL15224104831

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