No the shaft should not spin. The impeller should spin freely over the shaft however. When I clean my pumps or powerheads I always do a spin test with the impeller. I hold the shaft at the ends and then spin the magnet. If it spins freely and lasts a while, then all is good. If it stops after a turn or two then there is gunk or calcium in between the shaft and the groove and I either use the shaft itself to scratch it out from the inside of the magnet or sit in in a tub of vinegar for a bit to soften up the gunk buildup.
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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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11-07-2012, 04:24 PM
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