OK, it wasn't easy. After removing the inducer assembly, I had to remove a set screw that attached the fan blades to the motor shaft. The only way to access it was to open the inducer assembly. However, the plastic blades have a steel center which was frozen on the motor shaft. Long story short, I had to drill the motor shaft completely out and collapse even the thin piece remaining. In the process, it would have been very easy to damage the plastic blades or break them free from the steel center. I was able to reassemble the inducer assembly with the new motor and reinstall it in the furnace. Everything worked fine on the startup test using dip switch 6. I closed up the furnace and it is working well. For most people faced with this problem, I would recommend getting the full inducer assembly and motor combination. However, I was able to save over $200 by only replacing the motor itself.