Have you tried just exercising it a bit? Running through the speeds 50 to 100 times has helped many a shutter who's only real issue is that they haven't been worked enough. Don't get me wrong - it probably could use a good CLA from a professional, but, being a cheapskate, I often have found the exercise method, or a quick dose of either naptha (lighter fluid) or spray electronics cleaner to be enough of a fix for my old shutters. The Ilex is a marvel of mass manufacturing, not the precision machine that European makers were producing, but a good, solid workhorse nonetheless. Here's what SKGrimes has on them.