OK Here is the problem First I have to say I MESSED up I went to ajust the low speed needle better know as the mixture metering screw On my TT39 . I would like to know is there a way I can turn it all the way in then back it out so many turns to get at lest close to a idle and to get the motor started as of now I can't start the motor at all cause I messed up the setting. I have to high speed ok out 3 turns then in 3/4 turn that was working good till I messed with the low speed one . as of now like I said I have to give it almost half throttle to get it started when it does start . Again how do you reset the low needle screw. How many turns after its close all the way does any one know HELP HELP HELP. Fuel being used is 15% nitro 20% lube. Thank You Ed