Thanks for starting this thread, I'm almost ready to pull the 'disassemble' pin and the springs are about a month out. Looks like motor pull next week. Side note, I've not completely gone through the carbs yet, but I'll likely do that later today. I'll let you know on the status if your interested in the 6139S. I would definitely do a rebuild. I think it's been sitting about 20+ years. It's moving much better than the 4972S, which is still getting treatments of Blaster.
