I wrote last week about adjusting a Mid Continent clock that was running
slow. The factory said it could not be adjusted.
As it turned out, on my Cessna 172, it was not the clock at fault afterall,
but a corroded fuse holder mounted on the firewall in the engine
compartment. Only 2.5 volts were getting to the clock and the circuit had
6000 olms resistance showing on it. Other times, no voltage would get to the
clock and yet the fuse was not blown. After cleaning the fuse holder, 12.5
volts were detected in the circuit, and the clock runs perfectly now.
Tom