Guys: I have researched the forums for an answer, it is not there or I missed it. I am considering a P-Mag for the right side of my Lyc O-360 powered -9A and need to know if the newer 114 P-Mag is compatible with the D-180. Ideally, I would like to simply hook the existing right P-lead to the P-Mag get the RPM indication and be able to do a mag check with my standard, off, left, right, both start, key ignition switch. I also realize that if this is possible, I would have to remove the grounding lug from the right mag side of the ignition switch for the start mode. Thanks, Dan
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P-Mag tach hook up with D-180
- Thread starter 65xx
- Start date
Yes the D180 is compatible with the 114 P-mag.
No you cannot use the P-Mag plead as the tach source.
You must use the tach output of the P-mag.
You will need to ensure your pulses per revolution are set the same on the P-mag and the D180. There are separate parameters for each tach input on the D180. They can be different.
You can directly connect the tach output of the P-mag to the tach input of the D-180 without any resistor inline.
If you keep the impuse mag on the left and add a P-mag to the right, you should remove the jumper from your start switch to ensure that you start on both the mag and the P-mag. If you do this you will be amazed at how easy your engine will start. If you leave the jumper in, you will not be starting with the P-mag and that takes away one of the major advantages of the P-mag.
The tach signal is present on the P-mag even when the P-mag P-lead is grounded....
No you cannot use the P-Mag plead as the tach source.
You must use the tach output of the P-mag.
You will need to ensure your pulses per revolution are set the same on the P-mag and the D180. There are separate parameters for each tach input on the D180. They can be different.
You can directly connect the tach output of the P-mag to the tach input of the D-180 without any resistor inline.
If you keep the impuse mag on the left and add a P-mag to the right, you should remove the jumper from your start switch to ensure that you start on both the mag and the P-mag. If you do this you will be amazed at how easy your engine will start. If you leave the jumper in, you will not be starting with the P-mag and that takes away one of the major advantages of the P-mag.
The tach signal is present on the P-mag even when the P-mag P-lead is grounded....
Thanks for the info, well stated and comprehensive. One more question, will I have to add an on/off switch on the P-mag side to do the pre-takeoff mag check. Or will it be the same procedure as now with standard mags and ACS key switch? Thanks, Dan
EmagAir recommends a separate P-mag power switch so you can check the internal alternator operation. If you do not have a way to turn off the external power to the P-mag, you really can't check it.
The keyswitch will only be dealing with the P-lead...
The keyswitch will only be dealing with the P-lead...