"Dan Luke" c172rgATbellsouthDOTnet wrote in message ...

Their advice: "Ignore it; it's always been
like that."

Seems very reasonable. I have a CHT gauge in my Mooney that reads 20
degrees low (we tested the gauge to determine this). I'm not willing
to send Mooney $2000 of my money for a new gauge cluster (especially
since I have an EDM). So my advice to anyone flying my Mooney is to
just acknowledge that it reads low and use the EDM instead. In your
Archer, if the gauge ever read zero, it would get your attention. If
it read higher than the high it usually reads, it would get your
attention. Seems like the gauge is doing its job. We're not trying to
measure down to the milliamp here, those types of debugging are best
done on the ground with real equipment.

-Robert