Quote Originally Posted by NTFDAY View Post
I'd venture to say that they replaced the circuit board, doubt if they replaced individual component(s), and you ended up with another defective board. The only other thing I can think of that could cause your problem would be voltage spikes from your ignition.
Ken,
They said they did not replace anything, saying that it was simply "out of calibration" which made it sound like a potentiometer adjustment or something similar, but they told me that the adjustment could not be made without totally disassembling the unit. I asked what would cause the tach to go "out of cal" after operating for a year dead on, and the tech said that he did not see anything in the documentation to point to anything specific, but he did mention the possibility of voltage spikes causing problems, like "...charging the battery without disconnecting a cable". I believe that I have a component that is bad, or that goes out of range with time/heat, and then after a period may cool or ??? I'm hoping they offer me a new one at cost, as I really want to keep a matching set of gauges, and buying the six gauge set again would be the pits!!