3HP 4-Stroke Engine Gas Powered Water Transfer Pump Portable Petrol High Flow US. This gasoline engine water pump engine can quickly transfer clear water at speeds up to 35 GPM (gallons per minute). The gas engine on the pump makes it ideal for use during power outages and at remote jobsites. Powerful 79.8cc 4-stroke overhead valve gas engine, low oil alert, recoil start. Multiuse, The pump is suitable for garden lawn watering, field pumping, drainage operations, clothing crops, green seedlings, irrigation and fertilization, etc.Engine type: single-cylinder, air-cooled, 4-stroke gasoline engine. Maximum power and speed: 3HP, 3700r/min. Fuel tank volume: 0.95gallon. Engine oil tank volume: 0.16gallon. Water pump inlet: 1 (25mm).