You may also like. Gas-Powered Backpack Sprayer 8-Gallon 8500r/m 25.4cc 2-Stroke TU26 Engine. Description: The knapsack power sprayer, also known as the sprayer, is a series of high pressure sprayers. Powered by a two-stroke gasoline engine, the high-pressure piston pump is the working source. The spray height of the special spray gun can reach 6-8 […]