Reattaching the recoil spring to the rope pulley

A friend's chainsaw starter cord stopped retracting. He took the winder cover off and apart. He brought me the housing, the rope pulley, and the recoil spring. He doesn't think he lost anything, but isn't sure. I've repacked the coil into the winder cover, but can't find where the small loop at the inner end of the spring is supposed to engage in the starter cord pulley piece. Is there another piece missing?