undo t 5 bolts, remove lower unit, remove pump cover, slide old impeller off & replace with new one. Mske sure wesr plates & gaskets are good & replaced in correct order. put a little grease on top of unit & that's it.
The symptoms of Alzheimer's disease worsen over time, although the rate at which the disease progresses varies. On average, a person with Alzheimer's lives four to eight years after diagnosis, but can live as long as 20 years, depending on other factors.
This leads to death of nerve cells and consequent atrophy (shrinking) of the brain over time. What is the course of Alzheimerâs disease? Alzheimerâs disease generally progresses in a linear fashion over an average of seven years (as long as 20 years in some cases) from onset until death.