A mower deck insert includes a first cutting chamber, a second cutting chamber, and a discharge passage extending adjacent to the first cutting chamber and the second cutting chamber. The first cutting chamber includes a first axial scroll extending about a first vertical axis. The first axial scroll includes a first upper surface having a first start region and a first end region. The second cutting chamber includes a second axial scroll extending about a second vertical axis. The second axial scroll includes a second upper surface having a second start region and a second end region. The first start region is vertically lower than the first end region, and the second start region is vertically lower than the second end region.Tondeuse qui comporte un carter de coupe présentant sur sa face inférieure une cavité pourvue d'un premier profil intérieur, et un insert de carter monté à l'intérieur de ladite cavité. Ledit insert de carter présente un intérieur d'insert pourvu d'un second profil intérieur différent du premier profil intérieur.
