SL 190 150 v-max hammer. 21 M Prop around 2900 rpms. Set-up is factory with the addition of a SE 300 foil.

When pulling skier around 20 mph----2900 rpms and turn fairly sharp. Skier behind so nothing really aggressive. It feels like the prop loses its bite in the water. Actually feels like it completely stops pulling. I can advance the throttle and it will rev up and finally catch. Pulls smooth through nice wide sweeping turns. Just where the creek isn't as wide I need to come around a little quicker.

that doesn't work well for pulling a skier.

Any advice?