"This easy-start NorthStar pressure washer pump is designed for fast changeover, even in the field. Pre-plumbed and pre-tested. Fits 4-bolt engine face plates. Bolts not included use existing bolts from old pump to install new pump. HP 5, Fuel Type Gasoline, Max. PSI 3,000, Shaft Diameter in. 3/4, GPM 2 1/2, Application Pressure washer pump. Direct drive 140F max. inlet water temp 140F max. output water temp Chemical injector Thermal protector Adjustable pressure SAE30 non-detergent pump oil included"