Commercial Hot Water Pressure Washer 4000 PSI 4.0 GPM 420cc Gas Electric Start by | Jul 22, 2026Engine Type: 420cc Gasoline Engine. 1 × 420cc Gasoline Engine (Pre-installed). Starting System: Electric Start + Recoil Start. Water Flow: 4.0 GPM. ✔ Fast Hot Water Cleaning System. Pump: Imported Italian AR Triplex Pump.