Mi-T-M Gh-3004-Sm30 3500 Psi Pressure Washer, 3.5 Gpm, Hot Water, 8 Hp by | Jul 22, 20268 hp electric motor, 230 V three-phase power. – Belt-driven pump rated for up to 20 hours of weekly use. Key Features – Diesel/kerosene-fueled burner heating water between 200°F and 300°F. Electrical Outlets.