I FOUND THE MARBLE!! :biggrin: I was gonna try to open up the crankcase, but I didn't have a special tool, so I was surveying the situation and noticed something. A scratch on the starter clutch mechanism. It looked like that monster on the the airplane wing from the Twilight Zone movie had scratched it. I then noticed (page 52 in the manual) the starter driven wheel (about as big as a CD with holes in it) had some chunk of metal in one of the hole and part of the casting of the engine was a little mangled as it jammed between the gear and the wall. I was able to knock it free a little bit and for the first time, I could turn the engine!!! :2tup: Small victory, but at least I now know that that was was had jammed it.
The only problem is, I have no idea where that piece came from. It looks like a pin with a mushroom type head about maybe 8 mm in diameter. It kinda looks like a button head screw without the threads.