Santi.. first of all.. care cleaner will not clean the jets if thats the problem. The Welch plugs covering the jets need to be removed and the jets cleaned. Then new plugs put back. I would start at 1 1/2 turns out for the hi and lo speed needles. Its a fair starting place. You adjust your engine to run by its performance more than following turns of the needles. Your engine should idle well, transition from lo to high speed evenly and not be lean at the hi end. Thats my advice from 10 years working in the chain saw industry.. Regards BobH.