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.

This washer comes with five quick-connect nozzles (0°, 15°, 25°, 40°, and soap), allowing flexibility for different cleaning needs. The 50-foot hose is both kink- and abrasion-resistant, enhancing usability without frequent interruptions. Portability is decent given its 141-pound weight, thanks to a sturdy welded steel frame and 13-inch pneumatic tires that help navigate various terrains. However, due to its weight, it’s less convenient for casual or light-duty users who might prefer something lighter.

The detergent system is integrated with a dedicated nozzle for soap application, which is practical for removing tough grime. One minor practical note is the fuel tank design, requiring careful filling to avoid spillage. The Simpson PS4240 is well suited for professionals or serious DIYers who need high power and reliability, but its heavier build and fuel handling might be less ideal for occasional users.

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.

It comes with five quick-connect nozzles, giving you flexibility for different spray patterns—from gentle rinsing to powerful blasting. The 50-foot hose is long enough to reach many areas without constantly moving the machine. This SIMPSON model fits well for contractors or serious home users who want dependable strong cleaning power and good nozzle options.

If portability and built-in detergent use are top priorities, you may want to consider those factors before deciding.

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).

The frame is built of steel and mounted on large, never-flat wheels for easier movement despite the unit weighing 91 pounds. This makes it fairly portable for a machine of its size. Included are helpful extras like engine oil and a quick start guide to get you going right away. On the downside, the weight and size may be a bit much if you need something very lightweight or compact. While powerful, this model might be more than what’s needed for small or occasional tasks, and gas engines require more upkeep than electric ones.

Additionally, some users might find the fuel odor noticeable at first. If you have medium to heavy-duty cleaning needs around your home or vehicles and prefer the freedom of a gasoline engine without depending on outlets, this pressure washer delivers solid performance and flexibility.