6 wires? 4 speeds....hummmm.....can be done...but what you just described,
is a 3 speed motor....

One wire for common, 3 for speeds, and 2 for the cap....
if you had ONE for the cap, with the cap being fed off a hot....I can see
it...
You are right, there is a 7th wire for common, I just did not count it. Then
2 wires for the cap and 4 wires for speed.

One word of warning....if you DO use Grainger...(shudder) do NOT get a
Dayton motor....AOSmith or GE. Grainger is not the cheapest place to get
one, and the Grainger here will NOT sell to a homeowner. Just be prepared.
The original was a GE motor, so I'll try to stick with GE if possible

Thanks a lot .