pete - i put my head to the computer screen hoping it would tell me exactly what "doesn't work right" means, but nothing happened. Do you think you could be a little more specific about what is wrong? A needle is pretty basic. Before you start you slowly turn it in gently counting how many turns - easiest to do 1/2 - 1 - 1 1/2 - 2 - just under 2 1/2. Then write it down. Once the needle is removed and I am guessing some Berryman's B12 or Gumout carb spray was run into the hole? Then you screw it back in gently until it stops then count out the number of turns you wrote down to get it back to where it was. As a general rule only, if you didn't count the turns, set it to 2 1/2 from full in. Do not tighten it hard. Also some carbs have a high speed needle and some have a low speed needle and some have both. You need to tell us what kind of carb and what it is going on, make. year if known, model and serial number. Also - what was the original problem you had?