AR RRV4G40D-F24 VRT3 Direct Drive Pressure Washer Pump 4000 PSI 4.0 GPM This is a great replacement pump for your worn out pump. This unit is designed for daily use and it is perfect for contractors.. This pump is capable of producing up to 4000PSI at 4.0 GPM but it will work great on any gas pressure washers with a 1" shaft.The pump includes an external bypass unloader, a thermal relief valve, and male quick connect. This pump is completly rebuildable from the valves to the packings and unloader. These new pumps feature a new rod design, large side cover sight glass, ceramic plungers, high quality high-pressure seals, new, low-pressure seal with scraper (patented), two piece plunger guides, forged brass high efficiency head design and new styling. It will fit most HORIZONTAL shaft engines with a 1" diameter shaft. The pump bolts to the motor with a 4 bolt pattern and bolts up on 8 to 13 horsepower Honda MotorsSpecifications:†Max. Volume: 4.0 GPM†Max. Discharge Pressure: 4,000 PSI†Max. Pump Speed: 3,400 RPM†Shaft Diameter: 1†Hollow†Max. Horsepower Requirements: 14.55 GHP†Max. Fluid Temp.: 140° F†Unloader Inlet: 3/4" GH (garden hose)†Unloader Outlet: 3/8" Male Plugâ€Weight: 20.10 lb.Fits Delta model : DTH3635, Ridgid model : RD80770, Suitable replacement for 67DX39G1I, Fits Honda GX390 Engines with a 1" Output Shaft