RE: Rebuilt T-15 won't start.
Nope, I didn't take out the pin for the picture. That's an as-is shot. So the pin is indeed missing; I have shaken the engine about and heard no rattling, it turns over without any grinding or odd behavior, so it looks like I just lost it when I pulled the engine apart the first time. D'oh. Annoying thing is that I rebuilt it over 6 months ago, so that thing is most likely looooong gone. Definitely going to have to pay closer attention next time.
Thanks for the help guys! Looks nice and cheap on Tower so I'll pick up a new one.