Not having looked inside a Rio 2100 for a long time (I do have one kicking around somewhere though), does the impeller come off its shaft at all? If so, maybe there is some calcium buildup on the shaft itself that is causing the difficulties ... the impeller may look outwardly clean but unable to spin on the shaft. Something to look into perhaps?
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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