Friend Chaqueñito, forget the advice to set it fixed, for something the bendix is driven and retracts after driving the engine rack. If you do not get the spare part, neither do the scraps where the old cars go, I advise you to look for a bendix with the same number of teeth, same length, same axis and the same stria of the previous place where the axis runs, which is so when it is pushed towards the rack, exit already turning to engage the rack. If you do not get it, then buy a new starter motor that the blessix has the same number of teeth and the same path as the original.