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.
The average life expectancy after diagnosis of Alzheimer's is about seven to 10 years. However, there is some evidence that patients with early-onset Alzheimer's progress faster (four-to six-year average life expectancy). Moreover, there is great variability from patient to patient, so these numbers are very loose.