[TomM]

Mine actually went out as well. Had been acting up (bouncing around and pegging off the scale). Had the mags rebuilt for the engine overhaul and he checked the pickup and said it was fine. Reinstalled and did the same thing. Mechanic checked the wires to the tach and they were good.....frustrated I just replaced it with an Aerospace Logic electronic tach at annual (now). They make a "front/rear" labeled version. Trouble shooting can suck up a lot of time and when I cant do it myself, I draw the line when the finances just dont make sense.

When I get my plane back (next week) I would be more than happy to send you one of my pickups if you think that would be of help to troubleshoot this issue.