Our engineer analysed your situation. They think there are higher
voltage or current in your power supply. Please adjust voltage and
current.
Second reason, please measure resistance in your engine. If it damaged,
it can affect your voltage and currenct.

Luo



写道：

We had met your situation. The problem is your voltage higher. If you
have a higher voltage, the gauge begin working for a while normally,
then it will be burned down. Please check your aircraft's voltage,
power supply system, adjust your voltage lower.
Please check it whether the problem is.

Luo
Mingda aircraft instruments
http://www.ming-da.com

写道：

I've got about 200 hours on my Rotax 582 engine and was flying one day
when the tach quit. I bought a new Westach tach and installed it.
When I started the engine the tach seemed to work just fine but then
after a couple of minutes it quit. Thinking that I had a defective new
tach I sent it back and got a new one. I installed the new one and the
same problem. During the whole time the engine is running fine, I just
don't have the tach working. Has anyone else had this problem? If so
what was the solution? Thanks in advance for any help.

George