10 Best Gas Power Washers 2026 in the United States

The Simpson PS4240 PowerShot is a strong contender in the gas-powered pressure washer category, especially for professional use. It delivers 4200 PSI and 4.0 GPM, which provides a powerful and efficient cleaning experience suitable for demanding tasks like deck cleaning, wood restoration, and paint preparation. The Honda GX390 engine is known for reliability and ease of starting, making it a solid choice for contractors. The unit includes a heavy-duty AAA industrial triplex plunger pump with thermal relief to avoid overheating, which adds to its durability during extended jobs.

The SIMPSON PowerShot PS60869 is a solid choice if you need a powerful and reliable gas pressure washer for serious cleaning tasks. It delivers 4000 PSI, which is strong enough to handle tough jobs like deck cleaning, wood restoration, and paint prep. With a flow rate of 3.5 gallons per minute, it moves plenty of water to clean surfaces efficiently. The Honda GX270 engine is a big plus, known for easy starting and dependable performance, which is helpful if you’re using it regularly or for professional work.

The Westinghouse WPX3800 is a robust gas-powered pressure washer delivering 3800 PSI and a water flow of 3.6 gallons per minute, making it strong enough for cleaning driveways, decks, cars, fences, and patio furniture. Its 274cc engine is a reliable 4-stroke that starts with a simple pull and requires little maintenance. The washer includes a useful 0.8-gallon onboard soap tank, which helps apply detergent effectively for tougher cleaning tasks. You get a 35-foot hose that allows good reach around your work area, plus five quick-connect nozzles providing different spray patterns (from a narrow 0° jet for tough spots to a wider 40° fan for gentle cleaning).