I know this is an old thread, but the problem discussed earlier in this thread about the engine cutting out isn't solved with needle valves or oil mixtures It's a air venting issue with the metering chamber of the carb. That's why it happens when you roll to the right. Anyway, I've fixed my 61TS by making an adapter plate so I can rotate the carb 90 degrees with the metering chamber down. Fixed the problem and the engine runs great now.

Here's a link to describe my change:

https://www.rcgroups.com/forums/show...ostcount=10431