You have aroused my curiosity by your reply. What's the big deal about how many turns you start with? Yes usually 2-3 turns are sufficient. The main thing is to have it very rich then lean it out some. This guy I sent the reply to didn't know what was rich what way to turn needle etc. If you have read the original post as well as the one after that it was apparent that the purpose was to start rich then go less rich then lean then back to rich throughtout several tanks. What has it to do with your caterpillar certification? I was an aircraft mechanic in Navy during WW2, does that mean anything? NO!!I have been building flying RC since single channel escapements through all phases of equipment changes. and now includeing electrics. Does that mean anything? I would think so??? However, as I have said there are still things I can learn and often do. I'm on this forum to try to help those just beginning. If someone decides to be pickyune about 2-3-4 turns on needle they fail to see the intent. Yes ABC motors require different technique to some degree and think I mentioned that there will be differences with different motors. Basically though perhaps the most important thing is read manual if you have one. If not choose what you individually consider your best response to post and play it safe.