Back wrenching on the machine. Pulled and resealed the steering gear so the machine doesn't hemmorage oil all over now. A friend of mine who works in John Deere Dealer Technical Assistance Center called out a leaky throttle shaft on the running symptoms. There is significant play in the throttle shaft, more than 1/16. Going to try to tighten it up and or seal it. It isn't a significant leak, but it's enough to pay attention to it.