10 Best Gas Power Washers 2025 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 KB65132 King Brute is a high-powered gas pressure washer designed for industrial use. With a robust 4000 PSI and 4.0 GPM flow rate, powered by a reliable CRX 420 engine, it is capable of tackling heavy-duty cleaning tasks such as removing grease and oil stains from machinery and vehicles. The durable AAA triplex plunger pump ensures long-term performance, aided by features like low-oil shutdown for engine protection.

It includes premium accessories like a heat-resistant spray gun, insulated wand, and four quick-connect nozzle tips, enhancing its versatility and user comfort. The 50-foot hose provides extensive reach, and its sturdy steel frame with powder-coated finish ensures durability against rough handling and harsh environments. The unit is equipped with four large pneumatic tires for ease of movement across various terrains, although its substantial weight of 396 pounds may pose portability challenges for some users.

Additionally, the dual fuel tank system, with separate capacities for gasoline and diesel, supports prolonged operation without frequent refueling. Its design and specifications suggest it is most suitable for professionals and industries requiring powerful and efficient pressure washing capabilities. Its high weight and larger dimensions may be less convenient for everyday residential use. This machine is intended for rigorous industrial applications, offering reliability and high performance but requiring considerations for its heavy and substantial build.

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.