Pressure Washer Pump – Horizontal 3/4″ Shaft – MAX 3000 PSI, 2.5 GPM, Oil Sealed by | Jul 22, 2026►Hole Distance to hole is 2 9/16″. ►Key width 3/16″. ►Depth 2 5/8″. ⚠ Will not fit Shafts By Older GC160 Honda Engines. Plunger: Stainless Steel. Plunger seals: Oil Seals. Max Flow Rate (gallon/min): 2.5GPM.