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Hi All, I have an EDM 900 that is giving me crazy temp readings. I have been working with JPI support on it and am on my second probe, second location (now in fresh air inlet) and still the thing doesn't work. So......while I troubleshoot it; does anyone have a *cheap* but *functional and accurate* round windshield gauge I could use while I get this mess straightened out? I need something to pinch hit for fall IMC for obvious reasons.

What's the best way to remove a coat of paint from the OAT probe? Does anyone have a picture of what it should look like in the unpainted state? Don't want to liberally apply MEK to what turns out to be a plastic seal or anything....

Hey all - I need to relocate my OAT sensor from my pilot side air vent to the factory location on the passenger side wing on my 78 J. I have a JPI 730 and the existing sensor is the JPI 3in stick probe. I would rather install the mooney factory button sensor but not sure it will work with the JPI. I called JPI and they said maybe but can't say for sure. Is anyone running the mooney factory sensor with a JPI engine monitor? Thanks for your help!

Guys! Need your help again with some issues on my 1989 M20J MSE. Few months ago I had a major electrical failure (you can read here), and now, after lots of avionics repair, we're getting things as they were before, little by little. But still got some annoying troubles: - We had our R1 Eletronics International Tach replaced by a new one, but now we have approx. 30-60 RPM error, for example, at T/O, full power, full high RPM, the tach displays 2730-2740, and once the plane starts rolling, it may rise to 2760. We have no reasons to believe that the prop its really at more than 2700 since with the old R1 it never excedded it, and any adjustment was made at the governor, and we had checked rotational speed with a Tuning Fork (is this the right english term to reffer to it?) and it indicated 2700, full power, full rpm. We had not replaced the mag sensors, though, we are using the old ones. Do you think this could be the problem? - We replaced our Gauge Cluster, but sometimes, when you push PTT (both sides), the oil pressure indication drop till yellow arc. This happens on both radios (GNS430 and KX155), on transmitting modes. It seems to happen with frequencies higher than 130,00 MHz, but I'm not sure of this and if it has anything to do with it. - Our EGT/OAT (B & D P/N 0230-003, Mooney P/N 880001-509) is out of work: I know it gets energized, because it is noticeable when I pull the CB, but it just give wrong indications such as -30°C when the real OAT its like 30°C, and no rise in EGT at all while leaning. - Finally, the interior lights seem to be flashing at very high frequency, slower when the engine is at slower speeds, and higher, when the engine is at higher speeds. During flight its almost imperceptible, but during taxi its quite clear. Some general info: its a 28V system, SN 24-3139. We have replaced the Voltage Regulator and tested it several times in the plane (direct in the VR and with a multimeter through the cig lighter) and it seems pretty steady on the correct range. And at last, but not least, I am (as does the plane) in Brazil, so all of these nice avionics shops you guys indicates here at Mooneyspace are sadly unavailable for me! So, any help will be much appreciated!!! Tércio