Mel, I suspect you know Williams engines run like rabbits! My 70 tonner stops and starts abruptly, like other Williams engines I own. I solve this problem by putting on a train that is heavy enough to increase the starting voltage. You still need to be very gentle with the throttle, however.
The motors in Williams engines are wired in parallel. I heard some folks slow them down by wiring them in series. The tech I use rewired my B&M BL2 in series, but he said it ran too slow so he changed it back to parallel.
I consider this a minor problem. Williams engines are still a great value for conventional operators, in my opinion.
John
