Doug, it certainly sounds like the motor is open circuit across at least two of the windings. Measurinf resistance across a motor when spun by hand is not a good sign in this case, as it implies there is some induction going on.

I would rip the motor out and bin it, the costs of rewinding a 7.5hp against the cost of replacing, and the time involved...more economoical to replace..well it is here in the UK anyway [Linked Image]

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