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Last April the unit was serviced with I believe an OpAmp to allow RPM and Fuel Flow reading. Recently I got around to replacing my Dynon CHT/EGT Probes with ungrounded and removed the Dynon gear and...

Thanks Jonathan.
I'll send it in.

Here are the results of the test. There is no resistor in series with the wire from the pmag.
I started up and didn't have RPM. I do seeing counts with that and they run up to 1000 and go back to 0...

Jonathan,
I'm still not getting RPM while my FD180 works on either Pmag and a T-30 tach functions correctly.
I'm curious about the RPM Ground that I assume is used with a mag sensor install only. ...

Thanks for responding Jonathon
I originally tried the 12v mode on the each pmag using pin 33 the result was no rpm. I added diodes to each with the same result.

Fuel Flow: I initially used my...

I have a NOS AFS4500 that I purchased and am having problems with getting certain engine instruments to function.
I had a Dynon FD180 and D10A in my aircraft so the pinouts were very similar on the...

That makes more sense.
Thanks Jonathan

I've installed a 4500 into my aircraft and have a floscan fuel flow transducer. It had a K factor of 30,000 which was accurate in my previous legacy Dynon panel. Is there a starting point K factor to...

Thanks Jonathan. That's what I figured. I'll just keep what I've got and use the switch.

I have a backup alternator and use a dual mechanical shunt system in my RV-7. I use a selector switch to send the primary or secondary shunt information to the single ammeter input. It's worked fine...

Thanks Shawn. I'll just swap it out.

Any chance the Crossbow magnetometer is equivalent to Dynon Legacy mag? The units are identical size with same pinouts. It would save some work installing module.

I'm swapping from a Dynon FD/180 - D10A system to a never installed AFS4500. I've got a FLoscan Fuel Flow that requires 12 volts and works perfectly and don't want to swap out. Is there any +12v Out...