Thanks for the responses, guys! First off, I DID contact Sears, they, in so many words told me they don't warranty "close -out" items. Great! Thanks Sears, I'll never buy anything from you again, even after doing so for nearly 60 years!.
Secondly, I DID contact Kohler and they were actually worse than Sears as far as not wanting to know you. I spoke with one rep who wanted some additional info/pictures which I promptly sent. ZERO response from her after 2 weeks. Decided to follow-up and no one had heard of her (the rep) nor was there any record of me calling, reporting etc, EVEN though I had a ticket # which they claim wasn't valid. Incredible. Kohler by far has the absolute worst customer service I have ever experienced.
So I'm left to my own devices here, and figured I'd bite the bullet and re-install another motor. As far as the wiring goes, yes--that is a concern of mine as to which replacement motor I should buy. It cannpot be that hard, but if I hit a wall, I may just decide to part this tractor out. What a shame...I actually liked how it drove, the tight steering etc.