I started up my 611 this morning and all was fine until it started into an 0-72 curve, then it stopped abruptly...as if the power suddenly was cut off. Track power was at or near 18v and signal was a 9-10. This is the only MTH engine I own that has started to behave this way. It happens on the O-72 and 0-60 curves. Once I move it to straight away it performs flawlessly. That means I get about 15 ft of travel than it enters a curve and stops. This phenomenon showed up a few times in the past, rarely, and not consistently as it does now. I'm thinking the problem is unique to this 611 and may have something to do with the tether? I have one other MTH steamer, the Bavarian S 3/6 (20-3398-1) and it does not do this on any of the curves. If there is any test that would identify the issue or fix etc., that I can do...I'm not afraid to open up the shell...I'd like to try to fix it before I haul it off to a Tech. Thanks.
Here's a short clip (FYI it does this going forward or in reverse):
