Simpson Clean Machine 3400 PSI Gas Pressure Washer
- Pressure Washer
- 2.5 gallons
- Gas
- 1
A 3400 PSI gas pressure washer with a maintenance-free pump and low-profile frame, sized for regular homeowner cleaning jobs rather than commercial use.
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How it ranks among the 20 pressure washers we track
4.3★ across 2,000 Amazon ratings, Bayesian-smoothed toward the category average.
2,000 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
300+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 20 pressure washers we track - how the scorecard works · full pressure washers data report. Confidence: high - strong rating volume and complete data.Updated 7 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Simpson Clean Machine CM61083 is a gas pressure washer rated at 3400 PSI and 2.5 GPM, built around a 208cc CRX engine and an axial cam pump, with a 25-foot hose and four quick-connect nozzle tips.
This is a cold-water, homeowner-grade machine rather than a commercial unit, and Simpson notes it is not for sale in California, likely worth checking before ordering there. The low-oil shutdown on the engine and thermal relief valve on the pump both guard against the two most common ways small pressure washers get damaged: running dry on oil and overheating when the trigger sits idle.
- 3400 PSI / 2.5 GPM
- 208cc CRX engine
- OEM Technologies axial cam pump
- 25-foot MorFlex hose
Who it's for
Homeowners cleaning decks, driveways, siding, fencing, and outdoor furniture themselves. Not built for daily commercial cleaning contracts, and not sold in California per the listing.
Strengths and trade-offs
Drawn from this product's published specifications.
- 3400 PSI and 2.5 GPM for faster cleaning
- Maintenance-free pump with thermal relief valve
- Low-oil shutdown protects the engine
- 10-inch pneumatic tires ease transport
- Not compliant for sale in California
- At 64 lb it still takes some effort to maneuver over rough ground
Performance notes
The axial cam pump is described as maintenance-free, so it should not need the periodic oil changes some pumps require, and its thermal relief valve vents heat if the gun sits closed too long so the pump doesn't overheat. Four quick-connect tips, at 0, 15, and 40 degrees plus a soap nozzle, cover jobs from concentrated stripping to gentle rinsing.
Specifications
| Brand | Simpson |
|---|---|
| Model | CM61083 |
| Dimensions & fit | |
| Item Weight | 61 pounds |
| Item Dimensions L x W x H | 37 × 30 × 21 inches |
| Hose Length | 25 feet |
| Capacity & performance | |
| Tank Volume | 2.5 gallons |
| Maximum Flow Rate | 2.5 gpm |
| Power & efficiency | |
| Power Source | Gas |
| Construction & materials | |
| Color | Black |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Manufacturer Warranty Description | 2 years |
| Other details | |
| Item Type Name | Gas Pressure Washer, 2.5 GPM Residential Power Washer, Cold Water, 25' Hose, Clean Machine, 49-State Compliant (CM61083) |
| Maximum Pressure | 3400 psi |
| Specification Met | CETA, oem |
How it compares
This product against the closest alternatives we track in pressure washers.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Simpson Clean Machine 3400 PSI Gas Pressure WasherThis product | 4.3 / 5 | 2,000 | 4.3 / 5 |
| STA-BIL Pump ProtectorSTA-BIL | 4.8 / 5 | 7,800 | 4.8 / 5 |
| Westinghouse ePX3500 Electric Pressure WasherWestinghouse | 4.6 / 5 | 9,000 | 4.6 / 5 |
| 35pcs Air Pump Needle35pcs | 4.6 / 5 | 1,800 | 4.5 / 5 |
| CRAFTSMAN Electric Pressure WasherCraftsman | 4.3 / 5 | 3,500 | 4.5 / 5 |
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Questions about the Simpson CM61083
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is the Simpson CM61083 sold in California?
No, the listing states it is 49-state compliant and not for sale in California.
Does the pump need regular maintenance?
Simpson describes the axial cam pump as maintenance-free.
How long is the included hose?
It comes with a 25-foot MorFlex high-pressure hose.