Simpson Clean Machine 3400 PSI Gas Pressure Washer w/ 15" Surface Cleaner

The SIMPSON Clean Machine gas pressure washer provides homeowners with a high-powered solution for cleaning exterior surfaces. Powered by a 208 cc CRX engine paired with a 3400 PSI axial cam pump, this machine generates the output needed to tackle built-up grime on driveways, sidewalks, walls, fencing, patio furniture, and vehicles. Its included 15-inch surface cleaner helps cover large flat areas quickly while minimizing overspray.

At the core of the setup is an OEM Technologies maintenance-free axial cam pump outputting 2.5 GPM, equipped with a thermal relief valve to prevent overheating during long jobs. The engine includes a low-oil shutdown feature to help protect internal components from damage. For surface cleaning, the kit includes a steel shroud with dual stainless steel nozzles that provides ten times more coverage than a standard spray nozzle, making driveway and patio washing significantly faster.

Mobility and stability are handled by a balanced welded steel frame with a powder-coated finish for corrosion resistance. Large 10-inch pneumatic tires roll across uneven surfaces such as gravel, grass, and curbs without getting stuck. The package comes equipped with an ergonomic M22 spray gun, a 16-inch wand, a 25-foot non-marring abrasion-resistant hose, and four quick-connect nozzle tips ranging from 0 degrees to a soap applicator.

There are a few limits to keep in mind. This unit weighs 64 pounds and measures 37 inches long by 30 inches wide by 21 inches high, requiring dedicated storage space and some effort to lift into vehicles. Additionally, the 49-state compliant engine means this model is not available for sale in California. The 25-foot hose length also means you may need to relocate the machine when working around larger structures.

Verdict: This SIMPSON gas pressure washer is a solid choice for homeowners looking to clean driveways, sidings, and outdoor equipment efficiently. Its included surface cleaner attachment and heavy-duty frame make short work of large outdoor projects.

• Engine: 208 cc CRX engine with low-oil shutdown
• Pump: Maintenance-free OEM Technologies axial cam pump (3400 PSI, 2.5 GPM)
• Tires: 10-inch pneumatic tires
• Hose: 25-foot non-marring, abrasion-resistant hose
• Dimensions: 37 inches L x 30 inches W x 21 inches H
• Weight: 64 pounds
• Included Accessories: 15-inch surface cleaner, M22 spray gun, 16-inch wand, 4 quick-connect nozzles (0°, 15°, 40°, soap)

A great fit if you:

• Need to clean flat surfaces like driveways and sidewalks using a dedicated 15-inch surface cleaner attachment
• Want a gas-powered pressure washer with pneumatic tires to roll across grass and gravel
• Require multiple nozzle tips for tasks ranging from delicate car washing to intense surface cleaning

Consider something else if you:

• Live in California, as this 49-state compliant model cannot be sold there
• Prefer a lightweight unit under 64 pounds that is easier to lift and store

Can this pressure washer be purchased in California?
No, this model is 49-state compliant and is not available for sale in California.

What accessories come in the box?
The kit includes a 15-inch surface cleaner, an ergonomic M22 spray gun, a 16-inch spray wand, a 25-foot non-marring hose, and four quick-connect nozzles (0 degrees, 15 degrees, 40 degrees, and a soap nozzle).

How does the engine protect itself if oil runs low?
The 208 cc CRX engine includes an integrated low-oil shutdown feature that protects the engine when oil levels drop.

How large is the surface cleaner, and what makes it fast?
The included surface cleaner is 15 inches wide and features dual stainless steel nozzles inside a steel shroud, offering ten times more coverage than a standard spray nozzle.