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http://www.metalwebnews.com/howto/el.../elec-mtr.html

~Roy wrote:

It has to do with rotation of a motor....
Motor is a simple aquarium pump, submerged type, powered by AC current
of 115 VAC........2 wire power cord. Armature is the typical magnetic
type. Seems folks are dreaming that they can reverse rotation by
reversing the plug in the recepticle.......SOme have even gone to the
extremes of filing down the wide blade on the polarized plugs so they
can put plug in either way and think they are reversing
direction......Is it possible to change rotation of a AC motor like
this or not? If not, how about an explanatin why, and if it is doable,
an explanation as to how would also be appreciated........No other
mods to motor, just simply reversing plug orientation to reverse motor
rotation.....Not any need to get into the fact that the pump probbaly
would not work or work properly with a wrong rotation due to volute
design etc........

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This is worth repeating for benefit of all newbies!
Jo Ann asked Dr. Solo to remind people that while she has retired from selling GF (and sold
the business to Ken Fischer http://dandyorandas.com/) she has NOT retired from
helping people with sick GF and koi FOR FREE. 251-649-4790 phoning is best for
diagnosis. but, can try email put "help sick fish" in subject. Get your fish at Dandy Orandas
Dandy Orandas Dandy Orandas........you guys got that DANDY ORANDAS