Simpson 3000 PSI Pressure Washer Reviews [Gas-Powered]

Last Updated on October 19, 2026

The Simpson MS60805-S 3000 PSI gas pressure washer is built for residential cleaning. Equipped with a Honda engine and an OEM Technologies axial cam pump, this pressure washer produces up to 3000 PSI at 2.4 GPM. It also features a durable steel frame, large wheels, and a 25-foot hose for cleaning larger areas. Read this Simpson 3000 PSI pressure washer review to learn more about its features, performance, pros, and cons.

Whether you’re cleaning sidewalks, driveways, trucks, decks, or fencing, this machine provides enough cleaning power for many demanding household tasks. Simpson pressure washers are known for their sturdy construction and range of residential and professional models. Simpson is a U.S.-based brand, although individual components may come from different manufacturers.

The MS60805-S is an older MegaShot model that Simpson currently lists as discontinued. Earlier versions used the Honda GCV160 engine, while later versions featured the GCV170. Both versions were rated at 3000 PSI and 2.4 GPM. If you’re buying one in 2026, check the engine and model information on the actual machine.

Technical Specifications of the Simpson MS60805-S 3000 PSI Gas Pressure Washer

With a 3000 PSI pressure rating and 2.4 GPM water flow, this model provides a good balance of cleaning force and water volume. However, the actual cleaning performance depends on the nozzle, water supply, surface condition, and operating technique.

Simpson 3000 PSI Pressure Washer Reviews 2026: MegaShot MS60805-S

[toc]

Durable Steel Construction

Gas pressure washers generally experience more vibration and outdoor wear than electric pressure washers. Therefore, durability is important when choosing a gas-powered model.

The Simpson MS60805-S features a welded steel frame with a powder-coated finish. The frame supports the engine and pump while helping protect important components during normal use and transportation.

Its compact design also makes storage easier than many larger commercial machines. However, the washer should still be kept in a dry, well-ventilated storage area when not in use.

Powerful Honda GCV160 or GCV170 Engine

One of the main advantages of this pressure washer is its Honda residential engine. Earlier MS60805-S versions used the GCV160, while later versions were equipped with the GCV170.

Both versions provide enough power to support the washer’s rated 3000 PSI and 2.4 GPM output. Multiplying these figures gives 7200 cleaning units, a comparison figure commonly used when evaluating pressure washers.

This cleaning capacity is suitable for removing stubborn dirt, mud, and grime from many outdoor surfaces. It is particularly useful for homeowners who regularly clean concrete, walkways, and large patios.

However, gas engines produce more noise and require additional maintenance compared with electric models. They also produce carbon monoxide, so the machine must never be operated indoors, inside a garage, or near openings where exhaust fumes could enter a building.

4 Quick-Connect Nozzle Tips

Unlike some smaller electric pressure washers, such as the Ryobi 1700 PSI model, the Simpson MS60805-S includes four quick-connect spray nozzles.

• 0° nozzle: Produces a highly concentrated stream for limited, heavy-duty applications. It can seriously damage surfaces and cause injury if used improperly.
• 15° nozzle: Suitable for stubborn dirt on compatible hard surfaces.
• 40° nozzle: Provides a wider spray for lighter cleaning and more delicate surfaces.
• Soap nozzle: Applies compatible cleaning detergent using a low-pressure spray.

These nozzle choices make the unit versatile for cleaning driveways, patios, fencing, and certain outdoor equipment. Always test a small area before washing painted surfaces, wood, or vehicles.

For lighter cleaning tasks, you may prefer an electric model such as the Greenworks 2000 PSI pressure washer.

Maintenance-Free Axial Cam Pump

The pump is one of the most important parts of any pressure washer. The Simpson MS60805-S features an OEM Technologies axial cam pump designed for residential use.

The manufacturer describes this pump as maintenance-free because it does not require routine internal oil changes by the owner. It also includes thermal relief protection to help prevent excessive heat buildup.

However, maintenance-free does not mean the pump can be neglected. You still need to provide enough water, keep the inlet filter clean, and avoid running the unit dry.

Do not leave the machine operating with the spray trigger released for extended periods. Excessive bypass operation can overheat the pump.

Related article: If you want an electric alternative, read our Sun Joe SPX3500 induction motor pressure washer review.

25-Foot MorFlex Hose

The 25-foot MorFlex high-pressure hose is flexible, abrasion-resistant, and designed to resist marking surfaces during normal use.

Its length provides a convenient working range, so you won’t need to move the washer constantly while cleaning smaller driveways or patios.

If you need additional reach, you can use a compatible pressure-rated extension hose. However, the hose must meet the machine’s pressure specifications and use suitable fittings. Longer hoses can also cause additional pressure loss.

12-Inch Never-Flat Wheels

The Simpson 3000 PSI pressure washer weighs approximately 56 pounds, making it heavier than many compact electric units.

Fortunately, the machine comes with two large 12-inch never-flat wheels that make transportation easier. Because the tires do not rely on air pressure, you don’t have to worry about inflating them.

The wheels work well across many typical outdoor surfaces, although uneven or rocky ground can still make maneuvering more difficult.

Check Price on Amazon

Detergent Application System

The Simpson MS60805-S uses a detergent siphoning system for applying compatible pressure-washer cleaning solutions. Unlike some newer models, the standard MS60805-S is not specified with an integrated detergent tank.

To apply detergent, connect the detergent siphon tube to a suitable cleaning solution and use the low-pressure soap nozzle. The detergent system generally will not draw soap correctly when a high-pressure nozzle is installed.

Always use detergent approved for pressure washers. Avoid bleach and other chemicals that are not specifically permitted by the manufacturer, as they may damage seals and pump components.

For comparison, you can also explore the Simpson MegaShot MSH3125 3200 PSI model.

5-Year Frame Warranty and 2-Year Honda Engine Warranty

The original MS60805-S warranty included five years of limited coverage for the frame, two years for the Honda engine, and one year for the pump.

These warranty periods were attractive for a residential pressure washer. However, coverage depends on the warranty conditions, purchase date, and whether the unit qualifies as a new consumer purchase.

Since Simpson lists the MS60805-S as discontinued, buyers in 2026 should confirm warranty eligibility and replacement-part availability before purchasing remaining inventory or a used machine.

What We Liked About the Simpson 3000 PSI Gas Pressure Washer

• 3000 PSI and 2.4 GPM ratings provide strong cleaning performance for residential jobs.
• Four quick-connect nozzles support different cleaning applications.
• Durable powder-coated steel frame helps protect the engine and pump.
• Honda engine provides reliable power when properly maintained.
• Large 12-inch never-flat wheels make transportation easier.
• 25-foot MorFlex hose offers convenient cleaning reach.
• OEM Technologies axial cam pump does not require routine pump oil changes.
• Original limited warranty included five years of frame coverage.

What We Didn’t Like About the Simpson MS60805-S Pressure Washer

• The gas engine produces more noise and exhaust than electric pressure washers.
• It requires regular engine maintenance, including oil changes and fuel-system care.
• There is no built-in pressure adjustment dial, so cleaning intensity must be controlled through nozzle selection and operating distance.
• The standard model uses detergent siphoning rather than an onboard detergent tank.
• It is heavier than many residential electric models.
• The MS60805-S has been discontinued, which may complicate finding new inventory or replacement parts.

If you want another gas-powered option, our Generac 3100 PSI review covers a different residential pressure washer worth comparing.

Simpson 3000 PSI Pressure Washer Comparison Table

Simpson has offered several pressure washers with similar performance ratings. Because engine and pump configurations vary by model and production year, it is important to compare exact model numbers rather than pressure ratings alone.

Important: The MS60805-S and MSH3125 have different model specifications, even though both belong to Simpson’s MegaShot family. Engine configurations may also differ between older and newer production runs.

Common Simpson 3000 PSI Pressure Washer Problems and Solutions

Gas pressure washers can occasionally experience starting, water-pressure, and pump problems. The following troubleshooting table covers common issues.

Simpson 3000 PSI Pressure Washer Pros and Cons Table

How to Maintain a Simpson 3000 PSI Pressure Washer

Proper maintenance can help your pressure washer perform consistently and avoid unnecessary repairs.

• Check engine oil: Inspect the oil level before use and change it according to the Honda engine maintenance schedule.
• Use fresh gasoline: Follow the engine manufacturer’s fuel recommendations and avoid gasoline containing more than 10% ethanol.
• Inspect the inlet filter: Remove debris that could restrict water flow.
• Clean spray nozzles: Clear blockages only after shutting off the engine and releasing trapped pressure.
• Check the high-pressure hose: Replace damaged hoses rather than attempting temporary repairs.
• Winterize the pump: Follow Simpson’s storage instructions and use a suitable pump protector when freezing temperatures are possible.
• Store properly: Allow the engine to cool before storage and follow fuel-storage recommendations.

Never operate a gas pressure washer without a sufficient water supply. Running the pump dry can cause serious damage.

Summary

The Simpson MS60805-S 3000 PSI gas pressure washer is best suited for homeowners who regularly handle demanding outdoor cleaning tasks. With 3000 PSI at 2.4 GPM, it provides 7200 cleaning units and enough washing power for driveways, patios, sidewalks, and other suitable surfaces.

Its durable steel frame, Honda engine, MorFlex hose, and never-flat wheels make it a practical residential machine. The axial cam pump also reduces routine pump maintenance requirements.

However, it is louder and heavier than electric models. If quiet operation and easy storage are priorities, consider Greenworks electric pressure washers instead.

Since Simpson has discontinued the MS60805-S, its value in 2026 depends on the condition, asking price, parts availability, and warranty eligibility. If you find a well-maintained unit at a reasonable price, it can still serve as a capable residential pressure washer.

Frequently Asked Questions

If I add an extension hose, will the pressure remain the same?

No. Adding a longer high-pressure hose creates additional friction and can reduce pressure at the nozzle. The actual pressure loss depends on the hose diameter, length, fittings, and water flow. A correctly rated extension hose with an appropriate internal diameter helps minimize the loss. Always confirm compatibility with the pressure washer before adding one.

Can I use hot water with the Simpson MS60805-S?

No. The MS60805-S is designed for cold-water operation. Using water hotter than the manufacturer’s permitted inlet temperature can damage seals, hoses, and pump components. Follow the temperature limit stated in the manual for your exact machine.

Which is more important: PSI or GPM?

Both are important. PSI measures water pressure, while GPM measures the volume of water delivered each minute. Higher pressure helps loosen stubborn dirt, while greater water flow helps rinse debris away. Multiplying PSI by GPM provides a basic cleaning-units comparison, although it does not fully describe real-world cleaning performance.

Does the Simpson MS60805-S have a Honda engine?

Yes. Earlier versions used the Honda GCV160, while later versions featured the Honda GCV170. Check the engine identification label before ordering replacement parts because components may differ between engine versions.

Is the Simpson 3000 PSI pressure washer suitable for washing cars?

It can be used for vehicle washing with a suitable wide-angle nozzle, enough distance, and careful technique. However, 3000 PSI can damage paint, seals, and other vehicle components if the spray is concentrated or held too close. A lower-pressure washer is often more convenient for routine car washing.

Is the Simpson MS60805-S still available in 2026?

Simpson lists the MS60805-S as discontinued. Some sellers may still have older inventory, refurbished units, or used machines. Before purchasing, confirm the exact model, engine version, accessories, and availability of replacement parts.

Still have a question after reading this Simpson 3000 PSI Pressure Washer Reviews article? Comment below.