If you are experiencing awkward ideling from your .46 engine then it is most likely set too lean. Rc collector has posted the recommended settings in the above post. It would be a good idea to start off a bit rich on the bottom end, 2 turns in from flush. The bottom end needle is VERY sensative, much more sensative then that of the main needle. Depending on your location, weather etc. you may have to run the bottom end at a richer setting then the recommended 2 1/2 in. Then your next step would be to adjust the idle screw.

Regards,
CEN RACING