Still working on my first project -- a Gottlieb Target Alpha -- and have really weak flippers, especially the upper ones (and especially the upper right). I've just replaced the plunger assemblies, bushings and coil tubes on all 4 flippers with brand-new parts.

The bottom flippers are fair -- they generally get the ball to the top of the playfield (but not always).

The real problem is the top mini-flippers, and especially the upper right. The upper right barely moves the ball at all - it just seems to die when it hits a ball. (Which is strange, because when I test the flipper with my hand, it feels fairly strong and then goes into "hold" mode just fine.) I've checked and there is absolutely no flipper drag, and everything beneath the playfield seems loose and free, with no binding. The return spring is snappy but with only enough tension to return the flipper. I've tried adjusting the EOS switch so that it breaks at the very end of the stoke, but that hasn't seemed to make any difference.

FYI, the flipper coils are all Gottlieb A-5141, which is spec.

Any ideas?

14v and 28v (low/high) on all 4.

Is it possible the coil is only operating on the lower, "hold" phase? Is there any easy way to test for this?

Gentlemen - I found the problem with the upper-right flipper (which was the one that was clearly not working right). The fishpaper between the leaves had split and was resting against the contact -- so while the switch looked closed, it was actually holding the switch open (low power). I think the other flippers are all operating correctly and that I just need to upgrade to the more powerful 5141 'orange' coils.

I appreciate the help.