So are you running a Carter TQ carb?
If so, make sure you are venting it to the charcoal carnister and make sure that at idle throttle setting the vent valve is actually open. There is a specific pre-set you need to adjust for. Any carb rebuild instructions have the dimensions.
Heck, if you can find the carb # I will look this up for you, I have quite a few different docs around here.
Thanks Diplomat, I'll check and confirm the carb # and type.
Not sure what you mean by the vent valve.
Let me take a look .
