Originally Posted by njskier
Just to add a comment, if those impellers were a new install spray them with binding lube or soapy water solution so they don't start-up dry.
I also recommend replacing with the new green ones.......they work better for me than the yellow ones, esp for the KGB tank.
How much binding lube/soapy water is needed when coating a new ballast pump impeller before insertion?
How are most guys installing their actual ballast pumps? Impeller facing up or impeller facing down?