Anew prototype device for mechanical control water-hyacinth plants must be adapted using local materials. The attempt was to get rid of water-hyacinth plants from small canals and waterways through season 2013 at El-Shakeiloba village, Elberolos lake, Kafr El-Sheikh Governorate. It was evaluated under different conditions included machine forward speed, gathering reel speed and mean of water level height on field capacity, productivity, gathering efficiency, chopping efficiency, power consumption and operation cost. The results showed that the new prototype device produced maximum of field capacity and productivity of 49.93 m²/min and 6.017 Mg/h recorded with forward speed of 0.5 m/s, gathering reel speed of 0.94 m/s and water level height more than 150 cm. Meanwhile, maximum value of gathering efficiency was 98.82% and minimum value of machine losses was 1.18 % recorded with forward speed of 0.26 m/s, gathering reel speed of 0.94 m/s and water level height more than 150 cm. Besides, maximum of chopping efficiency was 87.41% recorded with forward speed of 0.26 m/s, and gathering reel speed of 0.56 m/s . Whereas, minimum value of power consumption and operation cost were 10.285 kW and 24.55 L.E/h respectively, recorded with forward speed of 0.26 m/s, gathering reel speed of 0.56 m/s and water level height more than 150 cm.