A hand-portable spreader blows particles, such as salt or sand, over an outdoor surface to increase friction. A start-up circuit is also provided. The method includes joining a first component and a second component. A plurality of second guide trenches is defined in the limiting wheel and inclinedly extends from the driving roller recess in a second direction opposite to the first direction. Alternatively, the control system may include a driving lever and a driven lever that are connected to a carburetor throttling valve and an air valve for controlling the flow rate of the air-fuel mixture and the scavenging air, respectively. The circular covers fit over a nut and bolt head or nut on the opposite sides of the joined flanges while a lock, such as a padlock, secures the shafts together.