OEM 2600 PSI Pressure Washer Pump for Troy-Bilt 020415 7/8″ Shaft by | Jul 22, 2026Maximum Flow: 2.2 GPM. Shaft Size: 7/8″. 3 Bolt Pattern: 7 11/16″ x 6 3/16″ x 6 7/16″ from center to center for each bolt hole. Maximum Fluid Temperature: 140° F. Inlet Type: 3/4″ GHA. Outlet Type: 22mm x 14mm.