bad impeller
Here is another who has had the same problem with replacement, after market, knockoff? Oberdorfer impeller wannabe. Mine didn't last as long as yours, but rather lost a blade almost immediatly. I bought the thing in Annapolis at what used to be the "Viking Boat Supply". What I learned from this is to be careful about what you see in the aftermarket. Now I always take an old unit with me to the store to compare dimensions.
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