If you have a wobbly-feeling pinball flipper, there’s a good chance the bushing is either worn or broken. In this two-part video I go over how to remove the flipper assembly and replace the bushings so you can get nice, snappy, flipper action.
This general technique applies to most flipper assemblies with only a few minor detail changes. Some bushings were screwed into the flipper assembly (especially with Gottliebs) and others were connect to the flipper assembly plates themselves (as in later WPC games).