Winter work

OK Ya'll. With the early onset of wintry conditions many of you have determined that now is the time for repair, renewal and restoration. When it comes to your carburetor don't ignore the fact that it needs to be cleaned and adjusted properly. If you think it is getting close to rebuild time do yourself a favor. Check the Throttle Shaft and the ports it passes through for wear. Optimum size is .3125" for both. After measuring note that a combined wear of .009 is reason to replace/bush both.
Before you try to separate them be aware that often the screws holding the plate, or butterfly to the shaft are split at the tips to lock them in. These tips will have to be removed by either filing them down or cutting them off. CAUTION! Do not strike the shaft itself or you could bend it. As well, prior to applying the torque to unscrew them do the following. Apply your favorite penetrant to each and let sit for a few minutes. Apply the correctly sized blade screwdriver to the slot and with a small hammer give each a couple of firm taps. This will break the corrosion often holding them. This will avoid breaking the head of the screw off. Not everybody has the correct drill bit and drill to safely remove the broken piece. Not following these instruction could see you cursing a blue streak because not only did you break the screw, but now you can't remove the shaft easily without scoring the port.
Before you decide to send the carb off or rebuild it yourself, please take the time to check this so you know what to expect.