Karcher introduced its top-of-the-line X Series of electric pressure washers in 2011, including the 2,000-psi, 1.4-gpm K5.740. The series features a newly designed axial cam pump made of a material Karcher calls N-Cor; PressureWashersDirect.com describes it as a corrosion-resistant polymer. The K5.740 and the 1,800-psi X Series 3.740 (*Est. $240) also have water-cooled induction motors. Karcher's rapid-exchange program is in force during the one-year warranty period. If you'd prefer to pay less for an equivalent amount of cleaning power, the electric AR Blue Clean AR383 (*Est. $165) gets good reviews; it has a less durable universal motor but a better-quality pump.
Product experts at PressureWashersDirect.com recommend the Karcher K5.740 as the best in the category of extra-large electric pressure washers, and a few owners rate and review it on the site, too. Amazon.com sells a slightly more compact pressure washer that's otherwise mechanically identical to the K5.740 under the model number K5.540 (*Est. $270), and a handful of owners post reviews there.
1. PressureWashers Direct.com
Mikenis writes an explanation of why the Karcher X Series K5.740 is identified as the best choice among extra-large electric pressure washers. He cites both the new water-cooled induction motor and the newly designed axial cam pump.
Review: Karcher X Series 2000 PSI (Electric-Cold Water) Pressure Washer, Bill Mikenis
2. PressureWashers Direct.com
About 10 owners rate and review the Karcher K5.740 on the site, rating it an average of 4.5 stars out of 5. One writes, "I use it for washing the car, cleaning the BBQ, and cleaning the concrete and deck. The supplied nozzles cover the range needed for these tasks." The most common complaint is about the quick-connect hose connector; one person recommends that you just go ahead and buy brass connectors.
Review: Karcher X Series 2000 PSI (Electric-Cold Water) Pressure Washer, Contributors to PressureWashersDirect.com
About a dozen people rate and review the Karcher X Series K5.540, which has slightly smaller dimensions, but is mechanically the same pressure washer as the 5.740 sold by PressureWashersDirect.com. All but one of them rate it either 4 or 5 stars; the person who gives it a lower rating writes that it fell forward the first time he used it, breaking the quick-connect hose connector.
Review: Karcher K 5.540 X-Series 2,000 PSI Electric Pressure Washer With Hose Reel, Contributors to Amazon.com