Rodney, I have a Kenmore 158.16510 as well - it's a great machine! The motor is a little more powerful than usual, I think. I got lucky and mine sewed fine right from the get-go...if you need photos of any innards or parts or anything just let me know! I tracked down a manual too, let me know if you need any photos of that. (I don't have a scanner.)
I like it, I think it's an attractive machine. Sweet and simple!