The word marcha has many meanings, most of which have to do with either marching or motion. The one meaning I learned this week, which is not in the dictionary I most often consult, is for a car starter motor. The word I most often seen written is arranque to mean a starter, but locally the mechanics all call it a marcha.
The only reason this comes up is that I had problems with my starter this week. Each place I consulted about parts or repair referred to it as a marcha, though they knew what I meant when I called it an arranque.