Are you sure that it even has a tach generator? If it does, it could be
either that or the guage. Try swapping things side to side until the
problem switches sides.

Mike
MU-2


wrote in message
oups.com...
My RPM gauge does not show anything at startup on right engine. Then at
runup it comes to life at high RPM. Then after that it works fine. It
wobbles a bit sometimes in the air. My take is that my tach generator
is the problem. Any other ideas. Also do you know where to get a
replacement unit or overhaul?