I have the Grand Rapids EIS. It came with wiring for the CHT but included in the package were two CHT probes that go under the spark plugs ala' ContinentalLycoming style. I'm using a Rotax 912 that already has probes in the #2 & #3 cylinders. I am not sure which wire would attach to the probe and then what to do with the remaining wire. I've read everything I can find from Grand Rapids regarding this and can't find anything that explains how to use the Rotax probes and I'd really rather not use the "under the spark plug" sensors. I wrote to GR and their explanation was so far off topic that it made no sense to me. I tried to call but they are in Michigan and are not at work. I've included a picture here (not sure why it turned sideways when I inserted it):
20200525_111128[1].jpg
I'm looking for someone that has a GR-EIS and has successfully accomplished my quest.
Thanks in advance,
Fred