I am trying to clean up a few of the niggling faults on my -71. The tach has worked intermittently for years and I have searched all the posts but have not found this specific problem. I disconnected the lower end of the cable at the bell housing to pull the cluster out. I believe that the problem is that the needle return spring overpowers the signal driving the rpm indication. If i tap on the top of the instrument panel while it is running it will indicate for a while but then it drops off again. It usually works when it is cold and then it drops to zero again. Does anybody have a fix? How does the teleflex cable rpm get converted to an electronic signal? The lighting on the left side of the cluster is also intermittent but not to the same degree.
irrops.
irrops.
