"Solid rust"?

OK, that's new info. How does a "solidly rusted armature" make any noise at all?

Anyhow, you're right, about the Canadian vs US pool thing. I was going to recommend a Hayward above-ground pump that's a better alternative to the one you're looking at . . . but shipping to Canada is $180 Cdn.

Basically, there's no way to get there, from here. I tend to forget between threads, just how hard it is to help non-US pool owners: the test kits aren't available; the chemicals aren't available; the equipment isn't available.

All that's left is providing general or conceptual information, but unfortunately trying to answer specific questions inevitably ends up wasting your time and ours.

Sorry. Good luck with the pump.