3/4″ Pressure Washer Pump 2600-3400 PSI 2.5 GPM Fits Honda Simpson Gas by | Jul 22, 2026Simply Replace it and Revive your Pressure Washer! ※►Diagonal distance between screw holes is 3 5/8″. ►Hole Distance to hole is 2 9/16″. ►Key width 3/16″. ►Depth 2 5/8″. There is no pressure relief before starting the engine.