Music Hall mmf-7 spins faster


I have a Music Hall mmf-7 turntable (EAR 834P phono preamp) and it spins faster than normal. I bought a new motor and a new belt from Roy Hall, but it didn't change a thing. I borrowed my friends' motor (he has an mmf-7.1): no change... I even bought a Pro-Ject Speed Box (on Roy Hall's advice): it still spins faster. My cartridge is a Sumiko Blackbird. I really don't know what much else to do: any ideas? Did someone run into this problem?

I am desperate.
lrmellon
Well, I'll wait until I receive the new motor some time next week.

And, Dweller, I emailed (member) TVAD asking him to participate in the dialogue. Let's wait and see what he will bring to the discussion. Thanks.
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I jus tried my friend's mmf-7.1 in my system and it played beautifully: no speed problems whatsoever. I have offered him to buy it and he agreed (he is going back to Rega).

But, I still need to make the mmf-7 work: I'll give it to my older daughter (now a college student) who has a keen interest in audio (I guess the apple didn't fall far from the tree).
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Nope, not at all; he was very happy with his mmf-7.1: just the upgrade bug. I simply asked at the perfect time.

You seem not really happy with Music Hall turntables: may I know why?