Honda® GX390 engine delivers 389ccs of cleaning power. Adjustable AR triplex pump allows user to adjust pressure between 300-4200 PSI. 4.0 Max GPM per PWMA PW101-2010. Fully welded durable frame. 50' flexible hose for fewer kinks, easier storage and extended reach. 13" pneumatic wheels for easy maneuverability. 5 quick-connect spray nozzles (0, 15, 25, 40 degree and soap) provide cleaning versatility. Siphon hose boosts detergent directly into the water stream.