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Old 03-27-2020, 02:37 PM
FlyingFox FlyingFox is offline
Join Date: Apr 2015
Location: Fort Myers
Posts: 9
Default Dual PMAGs, G3X Configurations

Anyone with dual PMAGs, using Garmin G3X, that has configured the RPM settings in the configuration section for accurate RPM, please share the configuration, or email me your configuration,

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Old 03-27-2020, 03:02 PM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,855

I have, are you using the rpm reading from both pmags or just one?
RV-14A #140376
N196 (Flying)
2019 Bronze Lindy
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Old 03-27-2020, 03:14 PM
FlyingFox FlyingFox is offline
Join Date: Apr 2015
Location: Fort Myers
Posts: 9
Default Just the left PMAG

Just the left PMAG,
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Old 03-27-2020, 03:17 PM
FlyingFox FlyingFox is offline
Join Date: Apr 2015
Location: Fort Myers
Posts: 9

Currently, set to: electronics ignition, 2 pulses per revolution.
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Old 09-08-2021, 04:10 PM
Eric Minnis Eric Minnis is offline
Join Date: Feb 2020
Location: Burlington, NC
Posts: 93

I know it is an older post but I am having a hard time with this. It is the last item to get working properly on my new build.

Single G3X is installed with a GEA-24 engine monitor module.
I am running dual P-mags on a Lycoming IO-320
The Ignition switch is a specific unit purchased from Stein for this ignition. It provides for 3 positions. Off, On and Test. I've used them often.
The engine runs great and the P-Mags test and operate as they should.

I have configured the G3X to RPM 1 for the Electronic Ignition option with 2 pulses per rev. The P-mags are new and latest software.
I am going from pin 6 on the P-mag to pin 8 on the GEA-24.

P-MAG wiring and set up was followed as was the G3X Install Manual.

I can not get a tach reading on the G3X to save my life. Today, I even swapped the pin 6 output between the P-mags and still nothing. I've done all the basic things like making sure pin 8 in the right spot and that all wiring if free of resistance and shorts, opens etc.

This has always been easy in the past and is my 5th or 6th G3X install. Could I have a bad GEA-24??

If anyone has any ideas I am all ears. This is literally the last set up item I have before first flight.
RV-7, XP-O-360 in process
Clip Wing Taylorcraft, IO-320
Dues paid
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Old 09-09-2021, 05:01 AM
MED MED is offline
Join Date: Jul 2015
Location: Aiken, SC
Posts: 813

Just a thought, but the tach wire to the p-mag is a shielded wire with a very small insulated inner wire. You need to remove the outer insulation, the shielding, and also the insulation on the tiny inner wire before connecting to the p-mag plug. It will probably work, then. Ask me how I know.
Miss March 2020
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