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Karcher G3050OH Review

Karcher G3050OH

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karcher g3050oh

As every homeowner in the United States knows all too well, it is a lot of work keeping up your house and property year after year. There seems to be almost no end to the different chores you have to take care of. The deck needs to be cleaned every so often, peeling paint needs to be scraped off and repainted, and siding easily collects mold and grime that has to be taken care of. And that is just on the house.

Around the yard, there is a whole other set of cleanup chores you have to take care of. This can take hours out of your weekend – but there is no reason it has to. With a residential pressure washer like the Karcher G3050OH, you can take care of all of these cleaning tasks and more quickly and efficiently. No more spending your whole weekend on chores. Now it takes a few hours.

Review Summary

review summaryWhen you own your own home, you want the kind of residential pressure washer that has the kind of power and versatility to allow it to deal with all kinds of different jobs. And you want to be able to take it anywhere you go. If you are washing second story windows with it, you do not want to run out of extension cord before you get halfway around the house. And with a gas powered pressure washer like the Karcher G3050OH, you can toss it in your pickup truck – or even the trunk of your car – and take it with you to the marina to clean off your boat, or to a neighbor’s house to lend a hand.

The Karcher G3050OH has the kind of powerful, Honda- made engine that you know you can count on to deliver reliable power over the long term. And it has a direct-drive axial pump that is designed to provide lots of pressure to the water spray. Because of that, the Karcher G3050OH has a cleaning power rating that is well above average for residential pressure washers. And It has five spray nozzles, so you can get the kind of options you need to tackle all kinds of different jobs with ease.


review specificationsThe Karcher G3050OH is a two wheel residential pressure washer with dimensions of 22 x 23 x 35 inches, so it will be easy to maneuver, especially because it only weighs 72 pounds. Yet it has a 187 cc Honda engine and a direct drive axial pump under the hood.

Dimensions22 x 23 x 35
Engine ManufacturerHonda
EngineGC190 187cc OHC
Power Rating7500
PumpDirect-drive axial
Spray GunCommercial grade
Nozzle5 (0°, 15°, 25°, 40°, soap)
Hose1/4-inch x 25-foot
Hose MaterialPVC/plastic
Wheels10-inch pneumatic
Weight72 pounds
Warranty1 year

Because of that, the Karcher G3050OH can provide a PSI of 3000 and a flow rate of 2.5 gallons per minute, giving it a high cleaning power rating. It has five nozzle options and a commercial grade spray gun, along with a 25 foot hose made of tough PVC plastic.


review descriptionAs soon as you get the Karcher G3050OH out of its box, you will know that you have a special residential pressure washer on your hands. With its gritty, stripped down appearance, powerful Honda engine and direct drive axial pump, it will be very clear that this is a pressure washer that definitely means business. It only takes a few minutes to get the Karcher G3050OH ready to go, too. It comes mostly assembled, and attaching the remaining parts can be done with regular household tools. Then, all you have to do is get it oiled up, fill the gas tank, and you are ready to do some serious cleaning.

That is because the Karcher G3050OH has one of the highest cleaning power ratings you can find on a residential pressure washer – any higher and you would be well into commercial pressure washer territory. This machine has a pressure of 3000 pounds per square inch and a flow rate of 2.5 gallons per minute, giving it a cleaning power rating of 7500. That is well above average for most residential pressure washers, and more than enough to make short work of just about any job you could think to use it for around your home.

Not only does it have a lot of power under the hood, the Karcher G3050OH also has an impressive array of other parts. Its hose is a full 25 feet long to give you a wide range of motion around the machine, and it has a professional-grade spray gun designed to hold up to the toughest conditions. Its frame is made of welded steel, and its hose is made of tough PVC plastic. This is a very solid residential pressure washer, and you will definitely be very pleased with the range of tasks it can complete.


review prosEven though the Karcher G3050OH has a sleek, stripped-down look, there is a lot going on in this great residential pressure washer. It has so many excellent features, in fact, that a list of just five Pros almost seems like it is not enough to capture everything this pressure washer has to offer. But in all of the most important areas, the Karcher G3050OH definitely delivers, so that is what we are going to cover here.

  1. High PSI and flow rate : Of course I had to start with the high pressure and flow rate on the Karcher G3050OH. These are some of the most important stats on a residential pressure washer, and this is the first area in which this excellent machine really delivers. With a pressure of 3000 pounds per square inch and a flow rate of 2.5 gallons per minute, the Karcher G3050OH is one of the most powerful residential pressure washers available today.
  2. Compact, lightweight design : In spite of all of the pressure and flow rate the Karcher G3050OH has to offer, it is still a surprisingly compact and lightweight machine, weighing only 72 pounds and measuring at just 22 x 23 x 35 inches. This is what you want in a residential pressure washer; it will be much easier to maneuver it around your yard and house. It will also be a lot easier to find enough storage space for it.
  3. Commercial grade parts : And even though the Karcher G3050OH is classed as a residential pressure washer, it is still designed with commercial grade, long lasting, durable parts. It has a professional grade wand, brass fittings, and stainless steel parts. Its wheels are 10-inch pneumatic tires, and its frame is durable enough to protect it from dings and dents. This residential pressure washer could stand up to the conditions on any job site, and it will certainly survive your yard.
  4. Five nozzle settings : Having lots of options is very important when you are buying a pressure washer to use around the home, because there are so many different kinds of jobs you can use it for. Whether you need to use the very highest setting to blast tough oil stains out of your driveway, or select a gentler spray to wash your windows or car, the Karcher G3050OH has what you need to get the job done right.
  5. High quality engine : All of that cleaning power is backed up by an engine that is very well designed – and you can count on that because it has the name to back it up. The engine on the Karcher G3050OH is made by Honda, a trusted leader in the business, and one you know that you can rely on to provide lots of power over the long term. And should you ever need a repair, Honda will make it easy.

Any one of these outstanding features would almost be enough on its own to earn a very high quality review for the Karcher G3050OH, and taken together, they make this one of the best residential pressure washers on the market today. It has the kind of PSI and flow rate you need for the toughest jobs, is made of the most durable parts, and yet is compact, lightweight, and easy for anyone to start up and use.


review consNow, even though the Karcher G3050OH has all of those great Pros, I would not be giving a complete review if I did not include a few areas in which it is a bit less than perfect. While I do not think any of the drawbacks I am about to discuss take away from all of its outstanding pros in any way, I think they are worth discussing in detail so you know what you’re getting.

  1. Not for sale in California : The fact that the Karcher G3050OH is not compliant with California Air Resources Board emissions standards is disappointing – for the most part because it means there are a lot of readers out there who will not have the opportunity to use it. This is very unfortunate because it is such a great machine, but it is not a design flaw. Noncompliance with the strict CARB regulations is not at all uncommon for gas pressure washers.
  2. Noisy and produces fumes : While the superior Honda engine on the Karcher G3050OH is very powerful and fairly compact, considering all of the power it provides to the machine’s pump, it has a not uncommon design that tends to be noisy and produce fumes. Because of this, if you are ever using the Karcher G3050OH in an enclosed space, make sure it is well ventilated, or else you will have to wear a respirator. Again, not a real drawback, but a word of advice.
  3. Cold water spray only : One of the real perks to owning a gas powered residential pressure washer is the fact that these machines are able to produce hot as well as cold water sprays – but unfortunately this feature is not nearly as common as I would like it to be. The Karcher G3050OH is one of the models that only produces cold water spray, which is limiting. But with its high PSI and soap option, this won’t take away too much.
  4. PVC hose can kink easily : The true advantage to a hose made from PVC plastic is the fact that it can withstand very high pressures without cracking its seams or developing the kind of leaks that would debilitate a lesser material. The main drawback is that PVC plastic is very stiff, and if the hose is kept rolled up for any length of time, it will tend to develop kinks. This is not a design flaw, just part of PVC hoses.
  5. Unit has to be winterized : Again, this is not a design flaw so much as it is a piece of healthy advice. You will have to either take the Karcher G3050OH indoors over the winter and keep it in a heated area – which is not hard to do since it so compact and light – or else winterize it. This involves making sure all of the water is out of the pump and hose before winter sets in so it doesn’t freeze.

As you can see, I do not think that any of the above Cons really constitutes a serious problem with the Karcher G3050OH. In fact, every one of these is simply par for the course when you own a gas powered residential pressure washer. I do wish it had a cold water option, but you can’t always get that on a gas pressure washer. As for the rest of them, they are not really problems.

Product Comparison

review comparisonNow, while Pros and Cons lists about a machine’s product specs are very useful as a means of figuring out if it is the right kind of model for your needs, they do not do everything in terms of helping you to settle on one or another. Comparison shopping is really the best way to do this quickly and efficiently. The following table compares product specs on the Karcher G3050OH with two similar models.

 Karcher G3050OHKarcher
Simpson PS3228-SSimpson
BlackMax BM80919MOBlackMax
Dimensions22 x 23 x 3534 x 20 x 2523 x 22 x 37.5
Engine ManufacturerHondaHondaHonda
EngineGC190 187cc OHCGX200 OHVGCV160 161cc OHC
Power Rating750089606210
PumpDirect-drive axialAAA industrial triplex plungerAxial cam
Spray GunCommercial gradePro-stylePro-style
Nozzle5 (0°, 15°, 25°, 40°, soap)5 (0°, 15°, 25°, 40°, soap)6 (0°, 15°, 25°, 40°, soap)
Hose1/4-inch x 25-foot5/16-inch x 25-foot1/4-inch x 25-foot
Hose MaterialPVC/plasticHigh pressure poly-braidedSteel reinforced,
non-marring rubber
Wheels10-inch pneumatic10-inch pneumatic12-inch never flat
Weight72 pounds84 pounds65 pounds
Warranty1 year1 year1 year

While the Karcher G3050OH is the smallest and one of the lightest of the three models, it still manages to have the kind of powerful engine and very high cleaning power rating that makes it downright competitive with a larger, more expensive commercial model. And as you can see, it absolutely blows away the other residential pressure washer in almost every category. Overall, I think that the Karcher G3050OH is probably the best of the three.


review conclusionWhen you are buying a new product that you intend to use around your house for many years to come, you want to make sure you are getting the very best one for your price range. It’s important, then, to be thorough. So let’s take another look at those Pros and Cons lists.

Conclusion Pros

  1. High PSI and flow rate.
  2. Compact, lightweight design.
  3. Commercial grade parts.
  4. Five nozzle settings.
  5. High quality engine.

With its high PSI and flow rate, the Karcher G3050OH is one of the most powerful residential pressure washers on the market today. And it still manages to have a compact design and not weigh very much, even though it has commercial grade parts and a superior engine.

Conclusion Cons

  1. Not for sale in California.
  2. Noisy and produces fumes.
  3. Cold water spray only.
  4. PVC hose can kink easily.
  5. Unit has to be winterized.

I do not think that any of these Cons are so serious that they take away too much from all of the great features the Karcher G3050OH has to offer. Most of them are what you would expect on a gas pressure washer, and the rest are not real problems in my opinion.

Final Word

What are the most important things to look for in a residential pressure washer? Well, the PSI and flow rate – and with them the cleaning power rating – are going to determine the machine’s toughness against serious stains. And its versatility is going to determine how many different kinds of jobs you can use it for. But you also want a pressure washer that is made of durable parts, that is reliable, and that is not too heavy or bulky.

In all of these areas, the Karcher G3050OH absolutely delivers. In most of them it is head and shoulders above most other residential pressure washers. In fact, it can compete with a lot of average commercial pressure washers as well. This is the kind of robust, serious pressure washer that you want in your garage. That is because you know you will be able to rely on it over the long term.

Best Price

review pricesWhile the design and ability of a pressure washer are definitely two of the most important areas to look at when you are considering which one to buy, let’s face it: in this economy, you also want to be very careful about how much you are spending on a new appliance. Well, with the Karcher G3050OH, you will not have to. It is certainly not the cheapest residential pressure washer on the market, but with all it has to offer, it shouldn’t be. But it’s also not the most expensive. All things considered, this is a solid pressure washer at a fair price.

Karcher G3050OH

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