The special issue was prepared with the aim to design and build a spray of water by using the engines. The characteristics of a structure made of steel 25 * 25 mm. (2 ") long, 80 centimeters wide, 46 centimeters high, 110 cm and used as a 1.2 hp with speed 7000 rpm test the actual work. The liquid sprayer's engine prototype. For performance and actual performance by spraying herbicide on plantations area 6603 square meters found effective in actual working prototype is 1.02 acres / hour.