It's an A.O Smith 1 HP pump. I have taken the whole assembly apart except for the motor itself--I don't know enough to be comfortable taking that part apart--and everything outside the motor appears to work fine. I'm going to look up an old post of mine and edit this one with the link about the impeller, but if I'm mistaken the impeller on this pump isn't supposed to turn. If that's true, should I be able to turn the shaft from the outside of the motor? There's a part of the shaft that sticks out a few inches from the motor that the impeller screws onto. Should that part turn?

Janet

Edit: Here's the thread from last year that describes the impeller situation--specifically my post #9. I think this motor is now about 4 years old. http://www.poolforum.com/pf2/showthr...acing+impeller