NY 17F then turned to the south in Hornell, overlapping NY 21 (now NY 36) south to the village of Canisteo. Within the village, it intersected with NY 248 at  before separating from NY 21 and continuing eastward out of Canisteo.
NY 17F traveled southward in Hornell, intersecting with NY 21 (now NY 36) south to the village of Canisteo.  It then separated from NY 21 and continued east out of Canisteo after crossing NY 248 within the village.