Generac OneWash 3,100 PSI, 2.8 GPM, 4-in-1 PowerDial, Gas Powered Pressure Washer Generac 212cc OHV engine rated largest, most powerful engine in its class PowerDial Variable-Pressure Control -Easily adjust the intensity of the spray to clean a wide range of surfaces with a single, easy-to-use control Consolidated Control Panel – All controls are efficiently located in a single location Comfort-grip Handle – Provides greater comfort for ease-of-use. Easy-to-pull inverted trigger reduces fatigue