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3100PSI 2.8GPM Pressure Washer

Model #6590

Starting At

$599.00 MSRP
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With a powerful Generac OHV horizontal shaft engine and professional-grade triplex pump, this 3100PSI power washer is just right for cleaning around the house, at work, or on the farm.

Professional-grade Triplex Pump

With features like ceramic-coated pistons, the triplex pump is designed for rugged duty and long life


This Generac engine provides maximum cleaning performance and reliability, and has low-oil shutdown to protect the engine


Take your pressure washer over even the most rugged terrain around the house, at work, or on the farm


Take up even less space in your garage or shed during storage, and transport the pressure washer even more easily

Additional Features

Pressure Control Valve – Provides complete control of water pressure for all applications

Brass Quick Change Fittings – Make hose connections even more quickly and effortlessly

35’ Steel-Reinforced Hose – Durable, non-marring hose will not leave scuff marks

Professional Spray Gun – Adjustable side handle provides precise control, and cushion grip and easy-to-pull trigger reduce fatigue and improve comfort during extended use

Welded Roll Cage Frame – Protects the engine and pump while providing grab bars for easier lifting

Five Quick Click™ Nozzle Tips Included – 0 degree, 15 degree, 25 degree, 40 degree, and soap applicator

Detergent Siphon Hose – Use a variety of cleaning solutions to improve results

The Power to

Concrete. Siding. Vehicles. And Much More.

Whether you're washing the driveway or prepping for a painting job, you need the right tool. Enter Generac pressure washers. Our customer research led us to engineer our pressure washers from the ground up, to meet your specific needs.

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Rated 5 out of 5 by from Powerful Tool I was gifted an earlier model. Setup is not bad. All parts were in the box. When ready engine started right up. I was cleaning a deck that I will patch. The powerwasher is great at cleaning out cracks, removing gunk that will hold water and prevent good application of a protective deck coating. I really like the unit. Used muscles that don't normally get a workout. The manual could be better organized. Information is there for most things but it may be distributed around with pieces of information scattered on different pages. The hose is rather stiff. A more flexible hose would be a significant improvement. The wire hose hook flaps around. I will fix with a wire tie. A hook for the detergent tubing on the vertical rail away from the muffler makes sense.
Date published: 2020-06-06
Rated 4 out of 5 by from Not bad Setup is very straight forward and doesn’t require a lot of “know-how” to get it ready. Once I had it assembled, oil and fuel filled up, pump oil checked and air purged, I started to notice some little things. First off the pull cord is in a terrible spot. If you aren’t careful it isn’t hard to scrape your hand on the frame above it (ask me how i know). Once running I found that unless you rev it up to aprox. 1/2-3/4 throttle the pump will stall out the engine and lock it up. I personally like to allow engines a little bit of warm up time at low rpm before going to work. That is doable but you must keep the wand trigger depressed when starting which can be “fun”. I also found that if you set it for its max pressure, it actually stalled the engine out at full throttle during use. Getting it started afterward wouldn’t happen until the pressure was dialed back. Once I found the “sweet spot” it seemed to operate properly. I also found that you need to really ram the nozzles into the wand and make sure they are 100% locked in. 1 time I thought it was and ended up turning it into a rocket. I do like how it is easy to move and how the wand doesn’t feel cheap. Overall the unit isn’t overly loud which is a plus, and the long hose provided does allow for less repositioning during use. I am hoping it will last, time will tell. This is my initial thoughts upon first use.
Date published: 2020-05-14
Rated 5 out of 5 by from Great product Pressure washer is compact and powerful. Have use it on my cars and driveway and the results are amazing. Highly recommend it.
Date published: 2020-04-07
Rated 4 out of 5 by from Love it except for a couple things.. My 6590 3100 psi is used infrequently but starts good and runs great the only negative thing for me is the starter pull location is behind the frame bar making it hard to get to and pull and as with most all pressure washers if the pressure isn't released from the wand prior to cranking it is very difficult to pull... Other than that I love it!!!
Date published: 2019-07-14
Rated 5 out of 5 by from sweet Fantastic washer , on/off switch location is horrible but everything else is perfect ! Now why have my Foam Cannons quit Foaming with it ? Thnx
Date published: 2019-04-24
Rated 5 out of 5 by from One of the Best out on the market The pressure is awesome, the tips give you a wide range of uses and the unit details what each tips should or should not be used for. The unit is easy to put together and works wonderful.
Date published: 2019-01-12
Rated 4 out of 5 by from Poor packaging The unit was delivered on time. The box was destroyed and when I went to move it the bottom fell out. Otherwise the unit was easy to set up and work fine on its trial run.
Date published: 2019-01-08
Rated 3 out of 5 by from Increasingly not happy! This is my third unit from Generac. The first one was used for 4 years and had 5000 hours on it. The second one was defective right out of the box and cost me 3 weeks of down time for my business. Now it has gas in the oil and needs to be repaired. I ordered a third one and just received it. It is missing a vented cap on the water pump. I can only get the part from a Generac Dealer who will order it from Generac and cost me more lost time while I wait for it, because Generac won't supply it to me.
Date published: 2018-12-10
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3100PSI Commercial 6590 is rated 4.5 out of 5 by 34.
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