
A gas engine trades the wall outlet for a recoil pull, and what you get back is reach and grunt the cord-bound crowd can't match - no extension cable snaking across a muddy driveway. These ten machines land, so the gap between a once-a-season patio rinse and a tool you'll run hard every weekend is smaller than you'd expect. The trick is reading the PSI and GPM numbers against the surfaces you actually need to blast clean.
Output is where this lineup separates itself. The Westinghouse WPX3400 tops the chart at 3400 PSI and 2.6 GPM, the Amerisun climbs to 3800 PSI at 2.5 GPM, and the Simpson Clean Machine matches 3400 PSI at 2.5 GPM - serious numbers built for driveways, siding, and fences caked in real grime. A handful of electric models sneak into the comparison too, like the wallet-friendly Westinghouse ePX3500 at 2500 max PSI, so you can see exactly what stepping up to a gas engine buys you. To rank these ten, we pulled the current Amazon specs, The WPX3400 earned the top slot on the strongest gas spec sheet in the group; cheaper picks scored on value, and the heavier rigs had to justify their bulk. Skip to the verdict for the quick call, or read each write-up for the trade-offs that matter to your jobs.
The short version: Our top pick is the Westinghouse WPX3400 Gas Pressure Washer, which leads the field on raw output - 3400 PSI and 2.6 GPM from a 212cc 4-stroke OHV engine, plus a five-nozzle set and never-flat 12-inch wheels. For the best value, the Westinghouse ePX3500 Electric Pressure Washer is the cheapest unit here by a wide margin and still brings 2500 max PSI, a 25-foot braided hose, and a 20-ounce soap tank in a 19-pound frame.


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The Westinghouse WPX3400 posts the highest combined output in the guide: 3400 PSI and 2.6 GPM from a 212cc 4-stroke OHV engine. It comes ready to work with a 25-foot Super-Flex hose, five quick-connect nozzles, an onboard soap tank, and 12-inch never-flat wheels on a steel frame. That blend of power and complete kit is why it edges out everything else here.
The Westinghouse WPX3200 trails the top pick by a hair on paper - 3200 PSI and 2.5 GPM against the WPX3400's 3400/2.6 - while sharing the same 212cc OHV engine and steel-frame build. It adds a half-gallon onboard soap tank, a 25-foot Super-Flex hose, and a five-nozzle set, with a maintenance-free axial cam pump for low upkeep. For most buyers that small spec drop won't be noticeable on the driveway.
Landing at #3, the Greenworks 3000 PSI is electric, not gas - it runs a 14-amp TruBrushless motor rated at 3000 PSI and 2.0 GPM, with cleaning units listed at 3300 C.U. Greenworks says its JettFlow tech delivers up to 50% more flow for reaching higher areas, and it ships with a rugged metal gun, a 25-foot kink-resistant Uberflex hose, and a five-tip set including turbo and soap nozzles. Independently verified PSI and GPM claims add some confidence to the numbers.
, the Westinghouse ePX3500 is the cheapest machine in the guide and our value pick, ranked #4. It's an electric unit delivering 2500 max PSI and 1.76 max GPM, but it earns its spot on portability and convenience: 16.5 inches tall, 19 pounds, four 360-degree quick-lock wheels, and anti-tipping technology. A 20-ounce onboard soap tank, a 25-foot braided hose, and an auto-stop pump round it out, all under a 3-year warranty.
The Simpson Clean Machine ranks #5 and matches the top tier on pressure with 3400 PSI at 2.5 GPM. Its 208cc CRX engine starts easily and includes low-oil shutdown, while the OEM Technologies axial cam pump is maintenance-free with a thermal relief valve. A 25-foot MorFlex non-marring hose, four quick-connect tips, and 10-inch pneumatic tires for gravel make it a practical pick for homeowners with uneven terrain. It's 49-state compliant.
The Westinghouse WPX3200e is the electric counterpart to the gas WPX3200, listing 3200 max PSI and 1.76 max GPM (2800 rated PSI, 1.1 rated GPM). A 13-amp universal motor with a 35-foot power cord drives a maintenance-free axial cam pump, and it carries a.61-gallon soap tank, a 25-foot Super-Flex hose, five nozzles, and 10-inch never-flat wheels. It shares the gas line's accessory loadout without the fuel.
At #7 and, the Westinghouse WPX3000e is electric, delivering 3000 max PSI and 1.76 max GPM (2600 rated PSI, 1.1 rated GPM). It pairs a 120V AC motor with a maintenance-free axial three-piston auto-stop pump, and ships with a 25-foot Super-Flex hose, a metal spray gun, five nozzles, a 35-foot Gfci cord, and 10-inch never-flat wheels. A solid mid-range electric for buyers who'd rather skip fuel and noise.
The Westinghouse WPX3000 Gas ranks #8, pairing 3000 PSI and 2.3 GPM with the familiar 212cc 4-stroke OHV engine and recoil start. It trims the kit slightly versus its pricier siblings - a 25-foot Super-Flex hose and four quick-connect nozzles (0, 25, 40, and soap) rather than five - and leans on a soap nozzle instead of an onboard tank. Still a capable gas option for buyers who want real engine power without the flagship
The Amerisun posts the top pressure figure here - 3800 PSI - at 2.5 GPM, driven by a 212cc 4-stroke OHV engine with air cooling. It ships with five quick-connect nozzles (0, 15, 25, 40, and soap), 10-inch never-flat wheels, and a reinforced steel frame Amerisun bills as commercial-grade. It's the heaviest unit in the lineup at about 68 pounds, which tempers the convenience but speaks to the build.
The Mutaomay 3500PSI closes our ranking at #10. Per its, it's a gas-powered washer rated at 3500 PSI and 2.3 GPM, built around a 212cc engine with four adjustable nozzles and a 25-foot high-pressure hose for cleaning walls, terraces, vehicles, and garden surfaces. It's a no-frills, lower-cost way into gas-engine pressure washing for buyers who don't need a name-brand build.
Don't start with the biggest PSI number - start with the surfaces you clean and how often. The specs that pull these ten apart, from engine displacement to nozzle count, all trace back to that. Here's how to weigh each one for a gas washer.
The Westinghouse WPX3400 Gas Pressure Washer takes the top spot on the strongest gas spec sheet in the group - 3400 PSI and 2.6 GPM, a 212cc OHV engine, a five-nozzle set, and 12-inch never-flat wheels - which is plenty for driveways, fences, and siding. For value, the Westinghouse ePX3500 is the cheapest unit here and still delivers 2500 max PSI, a 25-foot braided hose, and a 20-ounce soap tank in a 19-pound body, all under a 3-year warranty. If outright pressure is the goal, the Amerisun 3800 PSI hits the highest number in the lineup at 2.5 GPM - just know it's the heaviest at about 68 pounds. Be honest about the work: a 3400-or-3800-PSI gas rig is overkill for the occasional car wash, where a lighter electric does the job with less noise and no fuel.
The Westinghouse WPX3400 Gas Pressure Washer leads our comparison of ten models. It pairs 3400 PSI and 2.6 GPM - the highest combined output here - with a 212cc 4-stroke Westinghouse OHV engine, a 25-foot abrasion-resistant hose, five quick-connect nozzles, and 12-inch never-flat wheels, all backed by a 3-year limited warranty.
Among the gas models, the Amerisun 3800 PSI and Mutaomay 3500PSI sit at the low end each, while the higher-output Westinghouse WPX3400 and WPX3200 anchor the top. Spend more for higher PSI and GPM, a larger nozzle set, and onboard soap storage.
These ten range from 2500 max PSI on the electric ePX3500 up to 3800 PSI on the Amerisun. For cars and patio furniture, lower pressure is safer; for driveways, concrete, and stubborn siding grime, the 3400-PSI Westinghouse WPX3400 or Simpson Clean Machine clears jobs faster. Higher pressure on delicate surfaces can do damage, so pick the tip and pressure to match the task.
This guide includes both. The gas units, like the WPX3400 at 3400 PSI and 2.6 GPM, move more water and need no power cord, which suits large driveways and frequent heavy cleaning. The electric Westinghouse ePX3500 is lighter (19 pounds), quieter, and far cheaper - better for occasional car and patio work where you have an outlet nearby.
Several share a 212cc 4-stroke Westinghouse OHV horizontal-shaft engine with recoil start - that's the WPX3400, WPX3200, and WPX3000 Gas. The Simpson Clean Machine runs a 208cc CRX engine with low-oil shutdown, and the Amerisun uses a 212cc 4-stroke OHV engine with air cooling. All start with a recoil pull rather than electric ignition.
Most of these ship with a 25-foot abrasion-resistant hose. The WPX3400, WPX3200, Simpson, and Amerisun each include a five-nozzle set (typically 0, 15, 25, 40 degrees plus soap), while the Westinghouse WPX3000 Gas comes with four nozzles and the Mutaomay lists four adjustable nozzles. Use the wide-angle tips for cars and the narrow ones for concrete.