The only thing I could see was some wear on the back on the impeller was
worn. There is a star shaped hub that has six paddles attached to it so
that they can move about 45 degrees. The back of these seems to be worn
where they rub against the housing of the motor.

The impellor was free to rotate 180 degrees on the shaft that connects it to
the magnet.



"Pszemol" wrote in message
...
"PaulB" wrote in message
. com...
I have one of those and one for my skimmer. They work well enough, but
my
Rio 2500s stopped restarting after three months like clockwork. This
could
easily crash my tank if the power went off for a short time while I was
at
work. I could have bought an Iwaki for the money I spent on replacement
pumps and impellers, and saved money.

Have you inspected the impeller when in non-starting mode?
Whas it still like the new one is: build from two, loose pieces
or these two pieces stuck together? This half-turn of the free
move the wheel has around the magnetic core is crucial to pump
reliable re-start. Dirty maxi-jet and mini-jet with impellers
stuck into one piece have trobles starting as well.