Looking at them on E-bay and saw a couple needed a "transmitter", anyone using one of these ?? :shruggy:
Used one years ago when that's all there was. The used Sun EB-9 sender is readily available but will it work? Some of them had a mercury battery that might be hard to come by nowadays.
In any case, the Tach man tackman.com can repair them.
Looks like more trouble than a new one.