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Is this a common problem with Mag pumps? (1 Viewer)

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cobraden

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Spring near TC Jester and Cypresswood
I have checked out 2 used mag pumps in the last week that I was going to buy. When I took off the impeller housing to check the impeller I found the hole that the impeller spins in was worn and not round any more. (See pic) Is this a common problem in with the mag pumps?
 
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