variable speed maybe
Without seeing a wiring diagram to this unit I can't be of much help.. Your furnace is built by KEEPRITE but sold by SEARS as a KENMORE... It's possible the orange & yellow wires of the old motor were used to control the blower motor by variable speed... KEEPRITE uses this feature on some models for a more constant comfort temp. range... You could probably abandon these 2wires in place and your new motor will work just fine but if it were my furnace I would want to keep it as original as possible.. It may be best to call a pro to your home to make this repair...
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