how does the impeller relate to the water pump? if the inspection noted that the water pump needed to be replaced, does this mean the water wasn't circulating? shouldn't they have told me not to run the boat until it was replaced? seems like a pretty big deal.
yes, there was a screaching, not too loud, when i ran the boat. this was the reason i asked them to check the blower (thinking it was the blower). would most mechanics diagnose the problem if they heard a screaching?