PondMaster Model 18 Mag-Drive Replacement Impeller (1071464)
PondMaster Model 18 Mag-Drive Replacement Impeller is a replacement impeller for the PondMaster Mag-Drive series of pumps. Replacement impellers ensure reliable pump performance. Please note that this product may only ship via UPS dimensional weight, which is above its actual weight.
Was not sure if this would fix the problem, but since their seemed to be an attempt by the pump to turn my existing impeller I tried it. It worked and fixed the pump. Much cheaper than a whole new pump. Was disappointed in the shipping time, since it took a week to arrive.