Simpson

PowerShot 4000 PSI at 3.5 GPM HONDA® GX270 with Triplex Pump Cold Water Professional Gas Pressure Washer

|424 ratings
Item # 990374290
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Smart summary

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  • Professional Power: This PowerShot Series gas pressure washer delivers heavy-duty 4000 PSI at 3.5 GPM, designed for rigorous professional cleaning tasks like deck, wood, and graffiti removal.
  • Reliable Engine: Features a 49-State compliant, premium HONDA GX270 engine with high-quality components for optimum performance, an easy start mechanism, and a low oil shutdown feature.
  • Advanced Pump: Equipped with an AAA triplex pump, integrating an unloader and a thermal relief valve for consistent and protected pressure washing.
  • Durable Hose: Includes a 50 ft. Monster dual braided high-pressure hose, kink and abrasion-resistant, with a non-marring polyurethane outer jacket and QC fittings.
  • Robust Build: Built with a welded steel frame and powder-coated finish, ensuring enhanced durability and excellent corrosion resistance.
  • Terrain Mobility: Equipped with 13-inch premium pneumatic tires for easy maneuverability across diverse terrains, enhancing portability for professional use.
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5 out of 5 stars
5 out of 5 Stars. 8 reviews
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powershot 4000 psi at 3.5 gpm honda® gx270 with triplex pump cold water professional gas pressure washer three-quarter front view shows welded powder-coated steel frame, HONDA GX270 engine with white tank and red recoil housing, AAA triplex pump, coiled 50 ft. dual-braided hose on reel, 13 in. pneumatic tires, wand with quick-connect fitting and pistol grip. Often used by contractors for deck, siding and graffiti cleaning.
PowerShot 4000 PSI at 3.5 GPM HONDA® GX270 with Triplex Pump Cold Water Professional Gas Pressure Washer
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About this item

Product details

SIMPSON® PowerShot™ Series: For the Cleaning Professionals

Designed to meet the rigorous demands of the cleaning professional, the SIMPSON® PowerShot™ Series delivers heavy-duty pressure washing with flow and reliability. This series is the perfect choice for contractors specializing in deck cleaning, wood restoration, paint preparation, graffiti removal, and all other professional cleaning services. With the PowerShot™ Series, tackle the toughest cleaning tasks with confidence.

Premium HONDA® Engine for Optimum Performance

The PowerShot™ Series is equipped with a premium HONDA® engine that is 49-State compliant. Built with high-quality components, this engine is designed for optimum performance. The HONDA® engine is renowned for its easy start mechanism, ensuring a smooth and hassle-free cleaning experience. With the PowerShot™ Series, you get a combination of power, performance, and reliability.

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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: 120 lbs.

    • Member ratings & reviews

    4.8 out of 5 stars
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    424 ratings424 reviews
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    1. 5 stars85% (359)
    2. 4 stars11% (47)
    3. 3 stars2% (8)
    4. 2 stars1% (3)
    5. 1 star2% (7)
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    Showing 1-3 of 424 reviews

    Sep 1, 2026
    Reviewer name: J. Stewart
    5 out of 5 stars
    5 out of 5 stars review

    Verified Purchase

    Excellent pressure washer!

    [This review was collected as part of a promotion.] This is a great pressure washer. I was tired of smaller, less powerful pressure washers with an unreliable engine. This pressure washer with a Honda engine starts on the first pull every time, and runs until it is out of gas.

    Review from simpsoncleaning.com
    Helpful?64SZ32HSEACH13627100966
    Jul 14, 2026
    Reviewer name: power washing pro
    5 out of 5 stars
    5 out of 5 stars review

    Verified Purchase

    love our Simpson

    Love our Simpson, bought it a few weeks ago and uh. The job. and it was great and getting ready to use it again on another job and hopefully get to the where you 're looking at getting the same results And it was great and getting ready to use it again on another job and hopefully get to the where you're looking at getting the same results. best simpson i ever bought Best Simpson I ever bought.

    Review from simpsoncleaning.com
    Helpful?64SZ32HSEACH13627100966
    Jun 1, 2026
    Reviewer name: Mist it
    5 out of 5 stars
    5 out of 5 stars review

    Verified Purchase

    Great Pressure Washer

    [This review was collected as part of a promotion.] Pressure washer has plenty of power, adjustable pressure valve is great to regulate for different applications. Only complaint is the chemical syphon did not work regardless of having the soap tip on or not, purchased separate down stream injector that worked great. Best to use a separate down stream injector long term. Very happy with the build quality and performance of the unit.

    Review from simpsoncleaning.com
    Helpful?64SZ32HSEACH13627100966

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