Sticky tach

May 27, 2003
Recently put new glass and bezel on my old tach (which was working fine, just had broken glass) and now the needle's motion is very sluggish--it tachs up slowly, then either hangs up or returns to idle speed very slowly. I can't see any physical obstruction to the needle on the dial's face, so I assume the problem is internal, or at least below the tach face.

The cable seems to be ok, I greased it and it doesn't have any bad kinks.

Did I mess something up when I put the new bezel & glass on? Any suggestions (short of a $250 rebuild)?