Joe,
Far as I know, what Mazmart does with their pump is get a new one from Mazda and changes out the propeller. I know Mazmart doesn't change out the propeller on use pumps at all... mainly because issues like this might arise and they don't want to deal with it. My guess is that if you bought a new pump from Mazda, they might change out the propellers from bad one to the new one. I think that's a good deed from mazmart, but I can't speak for them
