Those telltales do clog easily, however, because the motor has a telltale stream doesn't mean the impeller is good.
When was the last time the impeller was changed? If 3 years or more, it is time to replace it. You will want to replace as a minimum, the impeller, SS wearplate and 2 gaskets. If the pump cover shows any scratches, replace that. If you find water in the gearcase, or any melting of the pump base replace it as well.