I live in a condo complex which employs a professional landscaping service to take care of garden area around the house. They all use equipment that is powered by two-stroke engines: leaf blowers, chain saws, hedge trimmers, lawnmowers, lawn edge trimmers.
With the leaf blowers and lawn edge trimmers they constantly play with the throttle, going between maximum and idle. I don't understand this really, is it impossible to hold them at half throttle?
The sound of the two-stroke engine itself is annoying, but the change in the throttle makes the sound really hard to ignore. What is the motivation for using those devices this way?